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—  37 min read

The Ultimate Guide to Construction Programs

By 

Last Updated Nov 6, 2024

By

Last Updated Nov 6, 2024

Construction worker on a jobsite checks the project schedule on a tablet

A successful construction project requires careful project management, with the construction program at its heart.

Think of a construction program as a roadmap detailing who needs to do what, where, when and in what order. It’s all about coordination, planning and a lot of careful decisions.

A well-structured construction program enables construction professionals to manage resources more efficiently, saving both time and money. It also helps anticipate potential hiccups before they become major issues, ensuring that the work stays on track. Finally, a solid construction program ensures that everyone involved – from contractors and suppliers to clients – knows their role and deadlines.

Below, we’ll take a look at the basics of construction programs as well as the principles that lead to a solid program, different methodologies and approaches to programs and common challenges that construction programs face – as well as ways to approach those challenges and improve construction programs overall.

Table of contents

Construction Program Basics

At its core, a construction program is essentially a detailed plan that outlines the timeline, milestones and tasks involved in a construction project.

Once construction begins, the program is a living document that represents the best path to completion for a project that is up against real obstacles like weather, differing site conditions, risk in the construction materials supply chain and labour availability.

Regardless of how the program is represented – be it a Gantt chart, a network diagram or a 3D model – it ultimately shows information about the timing and sequencing of every action that takes the project from beginning to end.

To effectively develop and manage this timetable, construction experts use specific terminology to describe the entirety of the project.

TermDefinition
Project milestonesSpecific points in time within the project program that indicate important stages of the project
DurationThe time to complete a task, usually measured in working days or calendar days
DependenciesRelationships between different tasks, where one task relies on another to start or finish
Lead timeThe amount of time an activity starts prior to another activity starting or completing
Lag timeA delay or waiting period following an activity required for reasons such as drying, curing or settling
FloatThe amount of time that a task can be delayed without delaying the project completion date (also called ‘slack’)
Resource allocationThe process of assigning and managing assets (like labour, materials and equipment) to complete specific tasks
Baseline programThe approved version of a program that can typically be changed only through formal procedures

When creating a construction program, construction project managers typically begin by breaking down the work into several different units (called ‘activities’ or ‘tasks’), estimate durations and arrange all project tasks – taking into account dependencies as well as lead and lag associated with various tasks to overlap and buffer as necessary.

In addition to these basic terms, creating a robust and useful construction program also depends on a number of key principles – like how work is divided up, how activities are sequenced and how resources are allocated.

Principles of Construction Programs

Construction programs are based on key guidelines. These include breaking the project into small tasks also referred to as work breakdown structure (WBS), identifying the most important tasks and deciding where to allocate resources.

Let’s go over some key concepts that determine the most important aspects when it comes to construction programs:

ConceptDefinitionExample
Work breakdown structure (WBS)A detailed breakdown of the total scope of a project into smaller, manageable tasksIn constructing a commercial office building, a WBS might include tasks like ‘Excavate site’, ‘Pour concrete for foundation’, ‘Install structural steel frame’ and ‘Install HVAC system’
Critical pathThe longest series of sequential tasks, which determines the minimum time needed for project completion (any delay in critical path tasks will affect the project’s end date)In the same office building project, the critical path could include sequential tasks like ‘Excavate site’, ‘Pour concrete for foundation’, ‘Install structural steel frame’, ‘Complete exterior walls’ and ‘Install roofing’
Resource allocationThe process of assigning and managing the necessary resources (labour, materials, equipment, etc.) for each taskThe task ‘Install HVAC system’ might involve allocating a speciality contractor’s crew and ordering specific equipment
Risk assessmentThe process of identifying, evaluating and mitigating potential risks in a projectRisks like weather delays, labour shortages and supply constraints affect many project programs
Continuous monitoringRegularly tracking the progress of the project against the program to identify any deviations and take corrective actionsWeekly reviews of the program might reveal that pouring concrete for the foundation is taking longer than expected due to unforeseen site conditions, and the program needs to be adjusted accordingly

Next, we'll take a closer look at each of these concepts and how they contribute to the overall functioning of an excellent construction program.

Work breakdown structure (WBS)

Construction projects are extremely complex, so breaking down the overall project into smaller parts is really important. 

Work breakdown structures (WBS) are used to identify the components that make up the entire project, which is helpful for estimating, tendering out portions of a job to speciality contractors and scheduling tasks.

In essence, a WBS creates a project hierarchy from big (the entire project) to very small (a single task). In practice, it looks like this:

WBS levelDefinitionExample
ProjectThe overall goal of the construction project‘Construct a new office building’
Stage Key stages in the project, typically organised chronologically‘Site Preparation’, ‘Foundation Construction’, ‘Superstructure Construction’, ‘Building Envelope Construction’, ‘Internal Works’, ‘Finishes’, ‘Commissioning and Testing’ and ‘Landscaping’
DeliverableA tangible item that is produced as a part of a phase; each phase has one or more deliverablesFor the ‘Superstructure Construction’ phase, a deliverable could be ‘Erected steel frame of the building’
TaskIndividual activities that need to be completed to produce a deliverableWithin the ‘Erected steel frame of the building’ deliverable, tasks could include ‘Deliver steel beams to site’, ‘Position and align steel beams’ or ‘Weld/bolt beams into place’

In order to use work breakdown structures effectively, construction professionals rely on several key rules:

  • 100% rule: The next level down in the WBS is a complete description of the level above. It means that the lower-level WBS elements should fully and completely define the scope of the higher-level elements, which ensures that no part of the project’s work is left out of the WBS.
  • Mutually exclusive elements: Each element in the WBS is mutually exclusive, or distinct, from all other elements. To prevent duplicated work, there should be no overlap in scope between different elements.
  • Measurable work packages: A group of related tasks at the lowest level of the WBS is called a work package. These packages should be defined such that their completion can be measured and monitored.

Simply creating measurable, mutually exclusive elements that all account for 100% of the project allows construction professionals to ensure that their programs are a complete reflection of the entire project. 

The critical path

With  construction programs , the critical path refers to the series of tasks that take the longest time to finish, and it determines the quickest time the project can be completed. Project managers pay close attention to these tasks since any delays here directly affect the project’s end date.

Determining the critical path requires the following steps:

  1. Listing tasks: First, construction project managers start by listing all tasks needed to complete the project; usually this is taken from the work breakdown structure.
  2. Sequencing tasks: Next, they determine the order in which these tasks must be completed, including dependencies. Some tasks can’t start until others finish, while others can happen simultaneously.
  3. Estimating task durations: For each task, an estimated timeline is established. These estimates are typically based on past experience, industry standards and input from specialists or subcontractors.
  4. Drawing a network diagram: Tasks, dependencies and durations are then plotted on a network diagram that visually represents the order of operations.
  5. Identifying the critical path: The critical path is the sequence of tasks that has the longest total duration. If any task on this path gets delayed, it will push back the project’s finish date.

The identification of the critical path affects the following:

  • Creating programs: Understanding the critical path allows project managers to program activities for the most efficient use of time and resources and helps them to see where there is flexibility in the program (tasks not on the critical path can possibly be delayed or reprogrammed without affecting the overall project timeline) and where there is not (delays to critical path tasks directly impact the project end date).
  • Contract: Often, construction contracts include clauses related to the project timeline, with penalties for late completion and sometimes bonuses for early completion. Identifying the critical path is crucial for making realistic commitments in the contract and for understanding the implications if delays occur.
  • Finances: The critical path affects cash flow, as money is often paid out upon completion of different stages of work. Delays in the critical path can lead to delays in payment, affecting the financial health of the project. Furthermore, delays can lead to higher costs, for example, through longer equipment rental periods, extra labour costs and penalty clauses.

In other words, the critical path is more than just a scheduling tool – it’s also a major factor in the financial health of both head contractors and subcontractors

Resource allocation

Resource allocation involves assigning available resources in the most effective manner to complete project tasks. In construction, resources primarily include labour, equipment and materials.

Here’s the general process:

  1. Identify necessary resources: For each task in the work breakdown structure, project managers identify the necessary resources. This could involve specific trades, specialised equipment or certain materials.
  2. Assess availability and constraints: Next, the availability of these resources and any constraints (like budgetary limits or time restrictions) are determined.
  3. Assign resources: Based on the requirements and constraints, resources are then assigned to tasks in the project program. This involves deciding how many resources are needed for each task and when they will be required.

Resource allocation plays an important role in construction programs, since it influences many other aspects of the project:

  • Overall timeline: The program relies on resource availability. If a needed resource isn’t ready, tasks might be postponed, potentially extending the project’s end date.
  • Budget management: Allocating resources wisely is important for staying within budget, as allocating too many resources can inflate costs, while too few can cause delays and increased expenses.
  • Efficiency: Correct resource allocation can also increase project efficiency. This is because by ensuring that resources are used effectively and not sitting idle, project managers can save time and money and increase overall project productivity.

Allocating resources carefully can actually help mitigate risks before a project even breaks ground. Of course, project managers also have to carefully reallocate resources as the project unfolds and conditions change.

Staying mindful of the critical path and the budget helps project managers wisely use resources while maintaining profitability and on-time completion.

Continuous monitoring

Continuous monitoring in construction allows managers to track progress, identify deviations and make necessary adjustments in a timely manner. Crucially, it involves regular communication with all project stakeholders to ensure everyone stays aligned with the evolving project plan.

Here’s a look at the typical continuous monitoring process:

  1. Tracking project progress: This involves regularly assessing the completion of tasks against the project program, then understanding what’s been accomplished and what still needs to be done.
  2. Comparing actual vs planned performance: The project’s actual progress is compared against the planned program. Any discrepancies can signal potential issues that need attention.
  3. Regular meetings: Regular meetings with all key construction personnel are a crucial part of the monitoring process. These meetings serve to discuss progress, create and share look-ahead programs, address issues and update the project plan as required.
  4. Making necessary adjustments: If discrepancies or issues are identified, necessary changes are made to the project program. This could involve rescheduling tasks, reallocating resources or activating contingency plans.
  5. Updating stakeholders: Whenever there are changes to the project plan, it’s essential to communicate these updates to all relevant stakeholders, including the developer. This ensures everyone is aware of the current project status and any changes in expectations.

Continually monitoring the project program helps keep a project on track – both in terms of timeline and budget.

Keep in mind that the on-the-ground reality of a construction project is always different from the ideal plan that was laid out beforehand, but savvy construction project managers are able to respond to changing circumstances to keep projects on target.

Visualising Construction Programs

Representing the construction program visually enables all stakeholders to understand the plan clearly, facilitates coordination and makes it easier to track project progress. While the construction process is complex, representing it visually can make it more comprehensible and manageable.

Three popular visualisation tools are commonly used in the construction industry today are: 

  1. Gantt charts 
  2. 3D BIM models with scheduling data (also called BIM 4D)

Each offers a unique perspective on the project timeline, tasks and dependencies, empowering project teams to manage the construction process more effectively. In the following sections, we’ll delve into each of these tools and their unique benefits to the construction programming process.

Gantt charts

Gantt charts are likely the most common representation of a construction program used in the industry today. These charts provide a graphical representation of the construction program, displaying all tasks and activities against a timeline.

Each task is represented as a horizontal bar, the length of which represents the planned task duration. The placement of the bar on the timeline indicates the task’s start and end dates. Arrows between bars represent dependencies among tasks.

These charts remain dynamic throughout a project. If a task can be accomplished earlier or faces delays, the chart can be adjusted accordingly, granting a real-time view of the project’s status to all involved. Because Gantt charts show dependencies between tasks, they can improve the coordination of the various tasks and resources required for a complex construction project. This ensures smooth coordination, as it can assist in sequencing activities, ensuring that necessary prerequisite tasks are completed before subsequent work begins.

Here are some key advantages of Gantt charts in construction programs :

  • Visual clarity: Gantt charts offer a clear, visual representation of the program that is easily understood by all stakeholders.
  • Task dependencies: Arrows show the interdependencies between various tasks, which can help prevent scheduling conflicts.
  • Progress tracking: Gantt charts can be updated to reflect the actual progress of tasks, making it easier to compare planned progress with actual progress.
  • Resource planning: They can provide a snapshot of when certain resources will be needed for specific tasks, supporting resource allocation and planning.

Using Gantt charts, construction project managers can visually manage, track and update their project programs, leading to improved project execution and coordination.

Network diagrams

In the realm of construction programs, network diagrams are another key tool.

Network diagrams are graphic representations of the project tasks and their sequential relationships. 

Unlike Gantt charts, which primarily emphasise the timeline, network diagrams emphasise the logical sequence of the tasks and the dependencies between them. They can present a clear sequence of events and how each task links to others, effectively showing the flow of the project. Nodes in the network diagram represent tasks, and arrows represent dependencies, showing the sequence in which tasks must occur. 

Like Gantt charts, network diagrams are also dynamic. As the project progresses and circumstances change, the diagram can be updated to reflect these changes, providing a real-time representation of the project’s progress and any alterations to the sequence of work.

Network diagrams can play a crucial role in coordinating tasks. By showing dependencies, they indicate which tasks need to be completed before others can begin, thereby allowing for more effective workflow planning.

There are several advantages of using network diagrams in construction programs:

  • Task sequencing: Network diagrams highlight the dependencies and sequence of tasks, providing a clear picture of the task flow.
  • Critical path identification: They can help in identifying the critical path – the sequence of tasks that must be completed on time for the project to finish on program.
  • Sensitivity analysis: Network diagrams can indicate which sequences of tasks have some scheduling flexibility (float) and which don’t, providing an understanding of how sensitive the program is to delays in specific tasks.
  • Effective coordination: By providing a visual flow of tasks, network diagrams can assist in coordinating the sequence of work, helping to prevent scheduling conflicts and bottlenecks.

Network diagrams can be used in coordination with Gantt charts. Some project managers use a network diagram to lay out the logical sequence of dependencies for a project, then lay out a timeline with durations using a Gantt chart.

3D models with scheduling data (BIM 4D)

In the evolving sphere of construction, Building Information Modelling 4D (BIM 4D) is emerging as a revolutionary approach, marrying 3D visualisation of the project with detailed scheduling data, thus providing a visual representation of the construction process over time. 

BIM 4D allows project stakeholders to visualise the project as it will be built, helping them understand how the project will progress and how the construction site will look at different stages.

Like Gantt charts and network diagrams, 4D BIM models are updated as construction progresses. As actual construction takes place, the 4D model can be updated to reflect the current project status, which allows stakeholders to see the progress in a highly visual and intuitive format, enhancing understanding and communication.

Using 4D BIM can significantly improve coordination among project stakeholders. By visualising the construction process, it becomes easier to identify potential issues, such as clashes between different components or sequencing issues, before they occur on site.

Here are some advantages of 4D BIM for preparing  construction programs:

  • Visualising construction progress: BIM 4D provides a dynamic view of the project’s progress over time, allowing stakeholders to better visualise and understand the construction process.
  • Improved coordination: Using a model paired with scheduling data can enhance coordination among stakeholders by highlighting potential conflicts or issues, aiding in their early resolution.
  • Efficient resource management: Modelling can assist in planning the use of resources, ensuring that they are available when needed and minimising idle time.

BIM 4D is a powerful tool for visualising the construction program, promoting effective coordination and enhancing communication among project stakeholders. It truly represents the future of construction programming, combining the power of 3D modelling with the time-related data of the construction program.

Program Methodologies

The approach to preparing construction programs can vary significantly, depending on the methodology a project manager employs.

This is because methodologies offer unique perspectives, tools and strategies for planning, managing and controlling the project program. Some may prioritise collaboration and flexibility, while others might emphasise strict task sequencing or the management of repetitive work.

To understand the range of approaches, let’s look at several established construction program methodologies and their distinguishing features:

MethodologyDefinition
Critical Path Method (CPM)A construction program technique that identifies the sequence of tasks that has the longest duration, thereby determining the shortest possible project duration
Last Planner System (LPS)A collaborative, commitment-based planning system that involves the project’s frontline workers (the ‘last planners’) in the program preparation process. In LPS, these workers make commitments to each other about what work will be completed in the next week, improving predictability and efficiency. It promotes a bottom-up approach, where the ones executing the work have a major say in the planning
Program Evaluation and Review Technique (PERT)A statistical tool that uses a weighted average of three times (optimistic, most likely and pessimistic) to estimate each task duration, thereby handling uncertainty in the project program
Line of Balance (LOB)A method for products that require repetitive work, such as high-rise buildings. It illustrates the rate at which units must be completed per time period to avoid disruption and shows where multiple crews are needed

It’s worth noting that these methodologies are not mutually exclusive, and a construction project may use more than one method at the same time. For instance, a project might apply the Critical Path Method for overall program development and the Last Planner System to enhance frontline worker engagement 

Each methodology offers its unique advantages and can contribute to the robustness and resilience of the construction program. The choice depends on various factors, including the project’s complexity, the team’s expertise and the developer’s preferences and requirements.

Critical path method (CPM)

The Critical Path Method (CPM) is a staple in the world of preparing construction programs, often adopted for its ability to effectively visualise and manage project timelines. CPM is a type of ‘push planning’, where project managers establish the work program and ‘push’ tasks forward based on the project’s needs and deadlines.

In practice, CPM begins with the identification of all the individual tasks or activities required to complete the project. These tasks are then sequenced according to their dependencies, and the duration of each task is estimated. The result is a network diagram that clearly shows the ‘critical path’ – i.e. the sequence of tasks that determines the minimum duration of the project.

Tasks on the critical path have zero ‘float’, meaning any delay in these tasks will directly impact the project completion date. Being able to identify the critical path means CPM lets project managers prioritise tasks and direct resources effectively and appropriately.

However, like any other methodology, CPM comes with its own set of strengths and weaknesses. Here are some examples:

AdvantagesDrawbacksStrategies to address drawbacks
Offers a clear visualisation of the project timeline, enabling easy tracking and managementAssumes fixed and certain task durations, which often doesn’t reflect real-world conditionsUse historical data and expert judgment to provide more accurate task duration estimates
Identifies critical tasks, allowing for prioritisation and efficient resource allocationOveremphasises task sequences and may overlook resource constraintsCombine CPM with other methodologies that focus on resource allocation, such as the Last Planner System
Simplicity and straightforwardness make it user-friendly and easy to understandDoesn’t fully account for uncertainties and unexpected changes in the projectImplement risk management practices and continuously update the program to reflect real-time changes

Although CPM is widely used, it's rarely the only planning tool in a construction project's toolbox. Often, it is integrated with other methodologies, each selected to complement the others and to address the unique complexities and requirements of the project. This balanced, multi-method approach can mitigate the drawbacks of each individual method and leverage their advantages, leading to more resilient and effective project scheduling.

Last planner system (LPS)

The Last Planner System (LPS) is a collaborative, commitment-based planning system that integrates should-can-will-did planning (pull planning) with constraint analysis, look-ahead scheduling and weekly work planning. Originating from the principles of Lean Construction, it puts the decision-making process into the hands of the people carrying out the tasks – the ‘last planners’.

In practice, LPS employs a series of collaborative meetings involving key project stakeholders, where tasks are backward programmed from a milestone or project completion date. This ‘pull’ approach ensures that work is planned based on the readiness and the capacity of the workforce – not pushed onto them without consideration of existing conditions.

Here are the advantages and drawbacks of the Last Planner System, as well as possible ways to handle these drawbacks:

AdvantagesDrawbacksHandling drawbacks
Greater control and commitment from the people executing the tasksRequires a high level of collaboration and trust among team membersFoster a collaborative environment and build trust among team members
Improved team communication and coordinationCan be time-consuming to implement and manageInvest time in training and implementing the system
Better risk management and reduced uncertaintySuccess highly depends on the active participation of all team membersEncourage and incentivise active participation

The Last Planner System works best when team members are willing to commit to their responsibilities and are happy to proactively discuss constraints and changes.

This is particularly true in complex projects with multiple interdependent tasks and overlapping trades, such as commercial construction projects or large infrastructure projects, where programs need to be coordinated between multiple stakeholders.

Program evaluation and review technique (PERT)

The Program Evaluation and Review Technique (PERT) is a statistical tool that was designed to analyse the duration of tasks involved in completing a project and is particularly useful in projects where the duration of tasks is uncertain.

In construction, PERT can be a valuable tool to manage the inherent uncertainty of construction processes.

PERT begins with three estimates for each construction task:

  • Optimistic time (O): The minimum possible time required to accomplish a task, assuming everything proceeds better than is normally expected.
  • Pessimistic time (P): The maximum possible time required to accomplish a task, assuming everything goes wrong (but excluding major catastrophes).
  • Most likely time (M): The best estimate of the time required to accomplish a task, assuming everything proceeds as normal.

Using those estimates, a project manager can use a formula – (O + 4M + P) / 6 – to determine the expected time and variance for each task, helping them create a more realistic program and account for potential shifts in task durations.

PERT helps with risk mitigation in construction programming by assigning a time range to each activity rather than a fixed duration, allowing for more realistic scheduling.

Furthermore, the variance calculation gives project managers insight into which activities have the most risk associated with their completion times, enabling targeted risk management efforts.

This approach has both advantages and drawbacks, detailed below:

Advantages of PERTDrawbacks of PERTStrategies to handle drawbacks
Provides a structured framework for estimating task durations and identifying critical activitiesAssumes a probability distribution for task durations that may not be accurate for all tasksComplement PERT with other scheduling methods to validate estimates and address uncertainties
Helps to mitigate risk by identifying the activities that carry the highest risk associated with their completion timesRequires three estimates for each activity, which can be time-consuming to gatherEnsure a clear communication channel with all involved parties to make the estimation process efficient
Offers a statistical approach to program estimation, which can be more accurate and realistic than deterministic methodsRelies heavily on the accuracy of estimates, as inaccurate estimates can lead to unrealistic programsInvest in regular training for project estimators and use past project data to improve the accuracy of estimates

Like other scheduling methodologies, PERT can be used in tandem with other techniques to take advantage of its strengths while compensating for its weaknesses. 

For instance, combining PERT with the Critical Path Method (CPM) allows for a more rigorous analysis of the project program, blending PERT’s probabilistic approach with CPM’s deterministic model.

Additionally, PERT’s focus on risk assessment aligns well with the proactive approach of methodologies like Lean Construction or the Last Planner System. These methods promote a collaborative planning process and emphasise ongoing learning and adaptation.

Line of balance (LOB)

For projects involving repetitive tasks that span multiple units or locations, such as the construction of identical units in a high-rise building or a housing development, a unique methodology called the Line of Balance (LOB) emerges as a beneficial approach.

Line of Balance, which is also sometimes known as flowline or repetitive scheduling method, is a graphical tool used to optimise the scheduling and management of these repetitive tasks. This method displays the rate at which these tasks need to be performed to maintain a continuous flow of work, thereby balancing resources and ensuring steady progress.

LOB scheduling presents a visual depiction of programmed work and actual work done. The program is represented on a chart with two axes:

  • The vertical axis typically represents the sequence of tasks or activities. These tasks are listed in the order they should be completed.
  • The horizontal axis represents the time, often with a specific scale like days, weeks or months.

The basic LOB chart contains diagonal lines for each task. Each line starts at the point that represents when a task should begin for the first unit (or location) and ends at the point representing when the task should finish for the last unit. The slope of the line signifies the speed of the work, with a steeper line indicating a faster pace of work and a less steep line slower work.

The goal of LOB is to create a steady and continuous flow of work, with no idle time between tasks. This is represented on the chart as a series of parallel lines, with no gaps between the end of one task and the start of the next.

When actual work progress is plotted on the chart, deviations from the planned program can be easily spotted. If actual work is lagging behind the planned program, the line representing the actual work would fall below the planned line. Conversely, if work is ahead of the program, the actual work line would be above the planned line.

This method has a number of advantages as well as some key drawbacks, including:

AdvantagesDrawbacksStrategies to address drawbacks
Optimises resource use and reduces idle time by ensuring a steady flow of workNot suitable for projects with non-repetitive tasks, or tasks that have varying durations across different unitsCombine LOB with other scheduling methodologies for projects with a mix of repetitive and non-repetitive tasks.
The cost breakdown is displayed as a graphical representation, making it easy for project managers to view the project timeline at a glance.Requires accurate estimates of task durations and clear definitions of task sequencesUse historical data, expert judgment and PERT or other estimation techniques to improve the accuracy of task duration estimates
Can be easily adjusted to accommodate changes in project scope or programMay require frequent updates and adjustments to maintain accuracyIncorporate regular program review and update processes, especially by using software tools

Line of Balance can be particularly beneficial when used in conjunction with other program preparation methods.

For instance, the Critical Path Method can be used to program non-repetitive tasks in the project, while LOB can be used for repetitive tasks. This combination ensures the overall efficiency and effectiveness of the project program. As with any methodology, it’s important to understand when and where LOB is most appropriate, and to adjust your approach based on the specific needs of your project.

Program Challenges

Every construction project, no matter how well-planned, can encounter program creation challenges. These may arise due to various factors such as unforeseen site conditions, changes in project scope, adverse weather, resource availability issues and more.

Understanding these challenges and being aware of them can help project managers better prepare for and mitigate potential project delays and overruns.

ChallengesExamples
Resource availabilityLimited availability of skilled labour, machinery or materials
Weather conditionsAdverse weather causing delays in outdoor construction activities
Change ordersDesign changes or unforeseen issues requiring adjustments to the original plan
Project complexityComplex projects with numerous interdependencies can make creating a program more difficult
Regulatory approvalsDelays in obtaining necessary permits or inspections can halt work
Unforeseen site conditionsDiscovery of hazardous materials or unstable ground conditions requiring remediation
Equipment failuresBreakdown of essential construction machinery causing work stoppage
Supplier delaysDelays in material delivery due to supplier issues
Labour disputesStrikes or other labour issues can halt work
Communication breakdownMiscommunication or lack of communication can lead to scheduling misunderstandings or conflicts
Decision paralysisStakeholders fail to provide key decisions in timely manner or request additional time to review
Quality issuesPoor quality construction leads to delays

Many of these challenges can be pre-emptively addressed during the creation of the program by incorporating contingencies and flexibilities that account for potential issues.

Of course, even with the most thorough planning, some problems will inevitably arise once construction begins. However, there are strategies to counteract these, which we’ll cover in the next section.

Strategies to Mitigate Program Problems

Construction project managers are equipped with an arsenal of strategies to improve construction workforce scheduling. These strategies range from proactive measures to reactive approaches applied once a problem has already arisen.

The choice of strategy usually depends on the specific situation, the resources at hand and the potential impacts on the project’s timeline and budget.

Here are a few common strategies used in the industry:

StrategyDefinitionType
Look-ahead programsDetailed programs created for a specified period ahead (like 2–6 weeks) to foresee upcoming work and manage resources effectivelyProactive
Resource levellingAdjusting the project program to minimise resource usage fluctuations, which helps in optimal utilisation of resourcesProactive
Program compressionReducing the project program without reducing the project scope; this involves techniques like fast-tracking and crashingReactive
Fast-trackingOverlapping activities that were originally programmed to occur sequentially; this increases risk and may result in reworkReactive
CrashingAdding additional resources to activities on the critical path to complete them sooner; this usually increases costReactive
Forensic program analysisDetailed investigation of the project program to identify issues that have caused delays and to suggest mitigations for future projectsBoth

Look-ahead programs

Look-ahead programs are a proactive planning tool that offers a detailed view of what’s expected to happen in the immediate future of a construction project. They are typically short-term, covering two to six weeks, and are updated on a regular basis – usually weekly.

The focus of a look-ahead program is managing upcoming tasks that are prepared, fully resourced and ready to go.

The process of creating and maintaining look-ahead programs involves the following steps:

  • Identify upcoming tasks: These are the tasks that are programmed to occur within the next few weeks. The time frame can vary, but it’s generally short-term.
  • Break down the tasks: For each identified task, break it down into sub-tasks or activities that need to be completed. This provides a more granular view of what needs to be done.
  • Assign resources: Determine which resources (materials, labour, equipment) are needed for each task and ensure that they will be available when needed. This step also involves assigning responsibility for each task to a specific team or individual.
  • Update regularly: Update the look-ahead program at regular intervals, such as every week. This allows for any necessary adjustments to be made based on the actual progress of the project.

Collaboration is a key factor in the success of look-ahead programs.

Project team members need to coordinate and communicate regularly to ensure that everyone is on the same page about what tasks are coming up and what needs to be done to prepare for them. This can involve regular meetings or check-ins to discuss the look-ahead program and any potential issues.

Look-ahead programs can also play a pivotal role in mitigating potential delays. By providing a short-term view of the project, they allow the project team to anticipate potential issues before they become problems.

At its core, look-ahead programs serve as a proactive tool for project management that focuses on preparation and forward planning. They help to ensure that tasks are not just planned but also ready to be executed, with all the necessary resources in place.

Learn more about the 6 phases of project management in construction.

Resource levelling

Resource levelling is a proactive technique used in construction project management to resolve resource allocation problems and manage resource usage efficiently. 

Using this strategy, the project program is adjusted based on resource constraints with the goal of balancing the demand for resources with the available supply.

Here’s how resource levelling typically works:

  1. Identify resource constraints: The first step in resource levelling is identifying resource constraints. Resources are most often people, equipment or materials.
  2. Review the project program: With constraints in mind, project managers review the project program. Examine the sequence of tasks and the resources allocated to each of these tasks. Note any instances where a resource is over allocated – for example, a tradesperson programmed to work more hours in a time period than is feasible.
  3. Adjust the program: Next, adjust the program to address the overall location. This can be done by delaying tasks or splitting them over longer durations. The objective is to ensure that no resource is overused at any point in the program.
  4. Review and repeat: Finally, review the modified program, and repeat the process as necessary until you achieve a balanced distribution of resources throughout the project timeline. This might also involve reassessing task dependencies and constraints to find more efficient program creation options.

For example, on a project, you might find that your team of electricians is programmed to work on wiring in multiple parts of a building simultaneously. In this case, you would reprogram these tasks so that they occur consecutively rather than concurrently, thereby preventing the overallocation of your electricians.

Resource levelling offers several significant benefits. By avoiding overallocation, it helps prevent burnout in your team, ensuring that productivity and morale remain high. It can also result in cost savings by avoiding the need for overtime or the hiring of additional staff.

However, resource levelling is not without its drawbacks. While ensuring that resources are efficiently used, there may be a trade-off in terms of project duration. Resource levelling can extend the project timeline as tasks are reprogrammed to avoid the overallocation of resources. This means that projects might take longer to complete than initially planned.

Furthermore, while resource levelling might prevent overexertion of resources, it could also inadvertently create periods of inactivity for resources. There might be waiting times or idle times when resources are not fully utilised, which can lead to inefficiencies.

Despite these challenges, resource levelling offers a proactive approach to ensuring that resources are used efficiently and effectively throughout the project’s lifespan. This prevents burnout among team members and can lead to significant cost savings.

Program compression

Program compression is a strategy used in construction project management to shorten the project program without changing the project scope.

It is typically done in response to project delays – or when the project needs to be completed earlier than initially planned. The technique is especially significant in large-scale projects where meeting deadlines is often tied to major financial implications like liquidated damages.

Two primary techniques are generally used for program compression: crashing and fast-tracking.

  • Crashing involves adding more resources to critical path tasks to complete them faster. For example, if a construction project is falling behind, crashing could involve hiring additional labour or working overtime to speed up the process and complete tasks in a shorter period.
  • Fast-tracking is a technique where activities that were initially planned to be performed sequentially are executed in parallel or overlap. This is done in order to actually shorten the program, which means that the tasks performed in parallel must be on the critical path.

Here is how program compression is generally used:

  1. Identify the critical path: First, you need to understand which tasks directly impact the project’s finish date. These are the tasks on the critical path. Delays in these tasks will cause your entire project to be delayed.
  2. Explore alternatives: Look for tasks within the critical path that can be sped up without affecting the project’s scope. This could be done by adding extra shifts, increasing manpower or employing more efficient equipment.
  3. Decide on a strategy: Based on your analysis, decide whether crashing, fast-tracking or a combination of both is suitable for your situation.
  4. Implement the changes: Implement the decided program compression techniques. This could involve hiring additional workers, working overtime or executing tasks in parallel that were originally planned sequentially.
  5. Monitor the results: After implementing program compression techniques, closely monitor the results to ensure they are effective. This includes managing any potential risks or drawbacks that may arise, such as increased costs (from crashing) or increased risk and rework (from fast-tracking).

Remember, program compression is a reactive strategy that can help bring a delayed construction project back on track. However, just like other methods, it’s not without risks, so it’s crucial to carefully consider the potential implications before making changes to your project program.

Crashing, for instance, can increase the overall project cost. The additional resources, be it more labour or equipment, will inflate the budget. This strategy may also cause resource fatigue or overallocation of resources, leading to decreased productivity. Not to mention, the quality of work may be compromised due to the rush to complete tasks, which, in turn, can lead to costly and time-consuming rework.

On the other hand, fast-tracking can increase project risks as activities are performed concurrently that should have been done sequentially. This could potentially result in rework if the tasks that were done simultaneously did not consider the output of preceding tasks as expected.

For instance, if interior design work begins before the building structure is fully approved, any changes in the structure’s design could mean that the already-started interior work needs to be redone. This can also lead to increased miscommunication and lack of coordination among different teams.

It’s important to keep in mind that while these risks exist, they can be effectively managed. Proper planning, clear communication and meticulous management can go a long way in mitigating these risks.

It can be argued that the benefits of program compression often outweigh these risks, especially when crucial project deadlines must be met. This strategy allows construction projects to adapt to changes and unforeseen delays, making it a valuable tool in the project manager’s arsenal.

Forensic program analysis

With  construction programs, a forensic review of a construction program, also known as forensic program analysis, is a process that involves examining and analysing the construction program after a project has concluded to identify what actually happened during the project, particularly when and why deviations from the planned program occurred.

The goal of forensic review is to determine the causes of the delays, their impacts on the project and who is responsible for them.

Ultimately, contractors and developers can use the findings to inform future projects and avoid similar delays in the future.

This can involve:

  • Reviewing the original program: The analyst begins by reviewing the original planned program, including the planned start and end dates for each activity, the sequencing of activities and the identified dependencies between them.
  • Reviewing the actual progress: The analyst then compares the planned program to what actually happened. This involves reviewing progress reports, meeting minutes, daily logs, change orders and any other documentation that provides information about when workforce planned activities started and finished and when resources were allocated.
  • Identifying delays: The analyst identifies any activities that were delayed or disrupted, noting when these delays occurred and how long they lasted.
  • Analysing causes of delays: The analyst tries to determine the causes of the identified delays. This could include factors like changes in scope, adverse weather, errors in the original program, resource shortages or other unforeseen issues.
  • Determining impact analysis: Finally, the analyst determines the impact of the identified delays on the overall project. This involves calculating how much the project was delayed overall and identifying any knock-on effects on subsequent activities.

The results of a forensic program analysis can be used to resolve disputes about delays, determine liability for increased costs or provide lessons for future projects.

The future of construction programs

Technological advancements, including advanced analytics, machine learning and artificial intelligence are reshaping construction programs. These innovations can enhance accuracy in predictions, enable timely adjustments and increase the overall efficiency of the process.

Artificial intelligence, in particular, holds the promise of analysing past projects to forecast realistic timelines and resource requirements for new ones, offering real-time program adjustments based on changes on the ground. This not only responds to issues but also helps prevent risks in construction projects.

The use and integration of Building Information Modelling (BIM) and other 3D visualisation tools with program software is on the rise. The creation of more detailed and accurate 4D programs through this integration will improve planning, communication and risk mitigation in construction projects.

While future tech offers exciting prospects, the core of construction programs lie in reducing risk management in complex construction projects, ensuring they are delivered on time and on budget while maintaining the highest standards of quality and safety.

As methods and tools evolve, the goal of making the construction process more predictable and manageable is becoming increasingly attainable.

The vision for construction programs is a landscape where projects run smoother, and where surprises are few and processes are streamlined for efficiency.

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Written by

Will Carpenter

Will is a Senior Strategic Product Consultant with a passion for utilising technology to enhance project workflows and efficiency in the construction industry. He plays a crucial role in assisting construction companies in maximising Procore's benefits.
With over a decade of experience in the construction industry, predominantly as a Civil Infrastructure Engineer, Will first used Procore as a customer himself, transforming his own daily operations. Captivated by its potential to elevate project and quality management, he made the decision to join Procore. His hands-on experience in construction, coupled with technical expertise, equips him to provide valuable insights and solutions for companies looking to optimise their workflows.

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