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Gantt Chart vs. Pert Chart - What Are the Differences?

> Project Management Knowledge > Gantt Chart vs. Pert Chart - What Are the Differences?
Posted by James Freeman | 03/10/2020
Both Gantt chart and Pert chart are used as project management tools to help in displaying the tasks for project completion. What are the differences between them?

Gantt Chart

Gantt chart is a graphical depiction for planning and scheduling projects. It breaks a project into smaller pieces of tasks with each of these spread out over time. With it, you can see task dependencies, scheduling constraints, duration of each task and percent complete.

In a Gantt Chart, each activity is represented by a bar; the position and length of the bar reflects the start date, duration and end date of the activity. The milestone is represented by a triangle, and the relationship is always shown with an arrow.

Gantt Chart Definition

See 10 Best Practices of Gantt Chart

Pert Chart

PERT stands for Program Evaluation Review Technique. It was introduced by the United States Navy in the 1950s. Pert chart is also a project management tool used to plan tasks within a project – making it easier to schedule and coordinate team members accomplishing the work. Pert chart was initially developed to simplify the planning and scheduling of large and complex projects.

Pert chart looks like a flowchart. It uses boxes and arrows to show the subtasks and their dependencies.

PERT Chart Template

Key Differences Between Gantt Chart and Pert Chart

Gantt Chart
Pert Chart
Represented with Bar Chart
Represented with Flowchart (or Network Diagram)
Used for Small Projects
Used for Large and Complex Projects
Provide Accurate Time Duration and Percent Complete
Need to Predict the Time
Cannot Display Interconnecting Tasks that Depend on Each Other
Has Numerous Interconnecting Networks of Independent Tasks

PERT vs Gantt Chart:How to Choose

Both Pert charts and Gantt charts are useful tools for project managers to visualize the whole projects. However, they differ from each other in many aspects. One of the differences is that the Gantt chart is more straightforward than the Pert chart. How to choose appropriate charts for different projects?

In the planning phase of a project, it is suggested to use a Pert chart since it presents the relations between each task, along with their dependencies and their estimated completion date.

However, if the project is underway, a Gantt chart is believed to be a better choice since it can track the whole project. Besides, all of the team members are clear on their responsibilities and due dates, which can help everybody optimize time management.

Project Chart Software for both Gantt Chart and Pert Chart

Edraw project chart maker provides templates for both Gantt Chart and Pert Chart. It has even more project management charts such as WBS diagram, timeline, etc. Download it now and create project charts with its vast collection of templates and examples.

Project Chart Software

Edraw Project: a professional interactive gantt chart tool

  • Visualize how projects evolve over time
  • Schedule, mange, and track your projects in real-time
  • Provide various Gantt chart templates and easy-to-use
  • Easy to estimate project costs and manage budgets
  • Compatible with MS office files (e.g. Microsoft Project)
  • Collaborate with team members effortlessly

Discover More Free Gantt chart & Pert Chart Templates

Can't wait to create Gantt charts and Pert charts for your projects now? All you have to do is select a template below or go to Edraw templates library to find what you want.

PERT Chart Template Gantt Chart for Planning a Show Gant Chart for Interior Design
PERT Chart Template Gantt Chart for Planning a Show Gant Chart for Interior Design

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A professional Gantt Chart tool to schedule, manage, and track your projects in real-time. Easy, light and powerful.