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Critical Path Method (CPM)

Project ManagementProject and performance management

Reference model

Critical Path Method StepsA sequence of 6 steps, read from the first to the last: 1, List all tasks; 2, Determine task durations; 3, Identify dependencies; 4, Draw the network diagram; 5, Calculate the critical path; 6, Update as needed.List all tasksIdentify all tasks requiredfor the project.1Determine taskdurationsEstimate how long each taskwill take.2Identify dependenciesDetermine which tasks dependon others.3Draw the networkdiagramVisualize tasks and theirdependencies.4Calculate the criticalpathIdentify the longest paththrough the network.5Update as neededRevise the plan as tasks arecompleted or changed.6

The critical path determines the shortest time to complete the project.

About this model

A project management technique that outlines the critical path through a project, showing which tasks are critical and which have flexibility in scheduling.

Originator not stated.

How to read it

  • Identify tasks and their durations.
  • Map out dependencies between tasks.

What this does

Identifies the longest sequence of dependent tasks that determine the minimum project duration, helping managers prioritize tasks and allocate resources effectively.

When to use it

Use it when you need to understand the minimum time required to complete a project and identify critical tasks that could delay the project.

Not when: Do not use it for projects with uncertain task durations or where tasks are not clearly defined and interdependent.

What happens next

Consider using a Gantt chart for visualizing the project schedule and task dependencies.

Golden thread

Builds on ←

  • Project charter
  • Task breakdown structure

Feeds into →

  • Project schedule
  • Resource allocation plan

Use this tool, free

Sign in to open the worksheet. Your work saves as you type, the AI can draft the parts you have not filled in, and you finish with an analysis and a 30/60/90-day action plan.

Drafted with AI and reviewed by Eccellere on 04/11/2026. Guidance, not advice: apply your own judgement.