A Beginner’s Guide to PERT Charts

Get a comprehensive overview through this in-depth discussion about PERT Charts. You’ll also obtain some elaborate PERT chart examples made with a dedicated tool!

people working together

In the world of managing projects, different charts help organize tasks. Think of them like maps guiding teams through work. One standout chart, the PERT (Program Evaluation and Review Technique) chart, clearly shows task connections and project timelines.

This article focuses on unraveling the magic of PERT charts. They’re like special blueprints, perfect for showing how tasks in a project link together. You’ll dive into why PERT charts are fantastic and how they make project management smoother by making tasks easy to understand and follow.

In this article
  1. What Is a PERT Chart?
  2. PERT Chart Examples
  3. When To Use a PERT Chart
  4. Pros and Cons of PERT Chart
  5. Conclusion

Part 1. What Is a PERT Chart?

PERT, short for Program Evaluation and Review Technique, represents a valuable tool in project management. The acronym signifies its purpose: program evaluation, which involves reviewing the progress and effectiveness of a project. The “review technique” part underscores its methodology of analyzing tasks within a project.

At its core, a PERT chart is a visual representation that illustrates and organizes tasks and their interdependencies in a project. Using nodes (usually represented by circles or rectangles) and arrows, it maps out the sequence of functions and their relationships, providing a clear overview of the project’s flow, unlike Gantt charts that primarily emphasize timelines.

PERT charts focus on task dependencies and the critical path. The critical path is the sequence of tasks that determines the project’s shortest duration. PERT charts utilize symbols and lines to show how tasks relate—when one task must finish before another can start or when tasks can run concurrently.

How a PERT Chart Works

A PERT chart is a visual roadmap for project tasks, emphasizing task relationships and dependencies clearly and concisely. It functions by utilizing nodes and arrows to illustrate tasks and their sequences. Each node represents a specific task or milestone, while arrows denote the flow or dependency between these tasks.

What distinguishes a PERT chart is its integration of three-time estimates—optimistic, most likely, and pessimistic—for each task. These estimates assist in calculating the expected time for task completion. By visualizing these varied time scenarios, the chart provides a comprehensive overview of potential project durations, aiding in more accurate project planning.

woman with pert chart drawing

Moreover, PERT charts allow project managers to identify the critical path—the sequence of tasks crucial for the project’s timely completion. This critical path analysis helps in focusing resources and attention on the most pivotal tasks, ensuring that the project progresses smoothly and meets its deadlines.

How To Make a PERT Chart

Creating a PERT chart involves several steps:

  • Identify tasks: List all project tasks or activities that need completion.
  • Sequence tasks: Determine the order in which tasks must occur and their dependencies. Use arrows to link tasks, showing their relationships.
  • Estimate time: Assign time estimates for each task using optimistic, most likely, and pessimistic durations.
  • Construct the chart: Draw nodes (circles or rectangles) representing tasks and connect them with arrows, indicating task sequences.
  • Calculate timing: Calculate the expected duration for each task using the PERT formula: (Optimistic + 4 * Most Likely + Pessimistic) / 6.
  • Identify critical path: Identify the critical path, the sequence of tasks with the longest cumulative duration, indicating the minimum project duration.

Tools like Wondershare EdrawMax simplify this process with pre-designed templates. Start by listing tasks, linking them based on dependencies, estimating durations, and inputting data into the tool to create a visual PERT chart for effective project management. Look at the following section for templates that you can follow.

Part 2. PERT Chart Examples

To make your life easier, here are some PERT chart examples that you can use. All of them are available at EdrawMax’s Template Community, where you can find more and inspire yourself with user-made templates.

PERT Chart Start-Up Analysis

This start-up business template is great for people looking to jumpstart a business. It involves all parts of the process. Simply add texts to indicate the date and time.

start-up business pert chart

PERT Chart for Software Development

This software development template is pretty comprehensive. It involves tabular nodes where you can add more information. It’s great if you don’t want to miss out on anything so you can focus on code.

software development pert chart

Blank PERT Chart

Lastly, this blank PERT chart example is great for easy editability. You won’t have to worry about deleting which content because everything is templated. It also has provisions for expected dates to finish.

blank pert chart template

Part 3. When To Use a PERT Chart

PERT charts are particularly useful when managing complex projects with numerous interdependent tasks and uncertain timelines. They shine in situations where tasks are interconnected, and understanding their sequence and dependencies is critical for successful project completion. Use a PERT chart when:

  • Tasks have interdependencies: A PERT chart clarifies these relationships if tasks rely on one another’s completion or need a specific order.
  • Uncertainty exists: When task durations are unpredictable, PERT’s three-time estimate approach helps estimate a more realistic project timeline.
  • Critical path identification: For projects with strict deadlines, PERT charts assist in identifying the critical path, allowing teams to focus on tasks crucial for timely project completion.
  • Resource allocation: PERT charts aid in allocating resources efficiently by highlighting pivotal tasks and ensuring they receive necessary attention.

In essence, PERT charts are beneficial when navigating complex projects, especially those with uncertain timelines and intricate task dependencies, providing a visual guide to manage workflows effectively.

Part 4. Pros and Cons of PERT Chart

PERT charts serve as invaluable tools in project management, offering a visual roadmap for complex projects. While they provide significant benefits, they also present certain drawbacks that warrant consideration. Below, explore the pros and cons of utilizing PERT charts in project planning and execution.


  • Visual clarity: PERT charts clearly represent task sequences and dependencies, aiding in easy comprehension for project teams.
  • Critical path identification: They help identify critical tasks and the shortest path for project completion, enabling focused resource allocation.
  • Uncertainty management: PERT accommodates uncertainties by considering multiple time estimates, allowing for better risk assessment and planning.


  • Complexity: Creating PERT charts can be time-consuming, especially for large or intricate projects, requiring meticulous detailing of tasks and dependencies.
  • Estimation errors: Reliance on subjective time estimates might lead to inaccuracies, affecting the overall project timeline.
  • Maintenance challenges: As the project progresses, updating and managing changes in a PERT chart can become cumbersome, impacting its relevance and accuracy.

PERT Chart vs. Gantt Chart

pert chart on black background

PERT charts and Gantt charts serve distinct purposes in project management. PERT charts illustrate task dependencies and critical paths, which is ideal for complex projects with uncertain timelines. They emphasize the sequence of tasks and the relationships between them.

In contrast, Gantt charts primarily display project timelines, detailing task durations, start and end dates, and resource allocation. They provide a comprehensive view of tasks against time, aiding in scheduling and tracking progress.

While PERT charts highlight task interdependencies, Gantt charts offer a comprehensive overview of timelines and task schedules. The choice between the two depends on the project’s complexity, team preferences, and the detail level required to visualize tasks and timelines.


In wrapping up, mastering PERT charts is a game-changer in project management. For a hassle-free chart creation experience, I strongly suggest using EdrawMax. This fantastic tool offers simplicity and versatility, providing a wide array of ready-made templates specifically crafted for PERT chart creation.

Whether you’re new to project management or a seasoned pro, EdrawMax’s intuitive interface empowers users of all levels to design professional-grade PERT charts effortlessly. Its user-friendly features and diverse template options make it a go-to solution for streamlining project workflows and ensuring clear communication among team members.

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Edraw Team
Edraw Team May 23, 24
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