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How can you use program evaluation and review technique to track construction project progress?

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Program evaluation and review technique (PERT) is a project scheduling technique that helps you plan, coordinate, and monitor complex construction projects. It involves identifying the key activities, estimating their durations, and arranging them in a network diagram that shows their dependencies and sequences. By using PERT, you can track the progress of your project, identify the critical path, and manage the risks and uncertainties. In this article, you will learn how to use PERT to track construction project progress in four steps.

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1 Step 1: Define the activities

The first step is to define the activities that are required to complete your project. You can use a work breakdown structure (WBS) to break down your project into smaller and manageable tasks. Each activity should have a clear start and end point, a responsible person or team, and a deliverable. You can use a spreadsheet or a software tool to list the activities and assign them codes or names.

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Jufran Helmi ,PMP

Project Management Consultant | CEO | Project Manager | Project Engineer | Experienced in: Oil & Gas, Smeltery, Renewable Energy, Infrastructure, and PMO
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PERT is a project management tool used for construction project tracking. Follow the below steps to use PERT for construction project tracking: 1. Break down the construction project into smaller, manageable activities or tasks. 2. Establish dependencies between different tasks. 3. Estimate the time required for completion. 4. Create a PERT chart. 5. Identify the critical path. 6. Update the PERT chart regularly. 7. Monitor and control the activities along the critical path. 8. Use PERT to forecast completion. 9. Use the PERT chart as a communication tool to keep stakeholders informed. By utilizing PERT, you can identify critical activities and make informed decisions to ensure successful project completion.

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2 Step 2: Estimate the durations

The next step is to estimate the durations of each activity. Unlike other scheduling techniques, PERT uses three estimates for each activity: optimistic, most likely, and pessimistic. The optimistic estimate is the shortest possible time to complete the activity, the most likely estimate is the most realistic time, and the pessimistic estimate is the longest possible time. These estimates account for the variability and uncertainty of the activity durations. You can use the following formula to calculate the expected duration of each activity:

Expected duration = (Optimistic + 4 x Most likely + Pessimistic) / 6

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3 Step 3: Draw the network diagram

The third step is to draw the network diagram that shows the relationships and sequences of the activities. You can use circles or nodes to represent the activities and arrows or lines to represent the dependencies. The arrows should point from the predecessor activity to the successor activity. You can use different types of dependencies, such as finish-to-start, start-to-start, finish-to-finish, or start-to-finish, depending on the logic of your project. You can also label the arrows with the expected durations of the activities.

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4 Step 4: Analyze the network diagram

The final step is to analyze the network diagram to track the progress of your project. You can use two methods to do this: forward pass and backward pass. The forward pass calculates the earliest start and finish times of each activity, while the backward pass calculates the latest start and finish times of each activity. The difference between the earliest and latest times is called the slack or float, which indicates how much time an activity can be delayed without affecting the project completion date. The critical path is the sequence of activities that has zero slack and determines the shortest possible duration of the project. You can use the network diagram to monitor the status of each activity, update the estimates, and adjust the schedule as needed.

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5 Here’s what else to consider

This is a space to share examples, stories, or insights that don’t fit into any of the previous sections. What else would you like to add?

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Anjana Sameera Thantirige

Senior Quantity Surveyor, Chartered Construction Manager and Chartered Valuer with 14 years of experience | B.Tec in Quantity Surveying | CIOB Chartered Member and Mentor | MCIOB | MRPSA | Ad.Dip in Civil Engineering
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Use PERT for construction projects by breaking down tasks, estimating time with optimistic, pessimistic, and likely values, identifying dependencies, creating a network diagram, calculating expected times, determining the critical path, monitoring progress, focusing on critical tasks, and adjusting plans as needed.

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How can you use program evaluation and review technique to track construction project progress?

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1 Step 1: Define the activities

2 Step 2: Estimate the durations

3 Step 3: Draw the network diagram

4 Step 4: Analyze the network diagram

5 Here’s what else to consider

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