Program Evaluation Review Technique

PERT is a tool used to plan tasks within a project, making it easier to estimate and schedule.

PERT is a variation on Critical Path Analysis that takes a slightly more skeptical view of time estimates made for each project stage.

How to use it ?

Estimate the 3 kinds of time for each activity:

  • shortest possible time
  • the most likely length of time
  • the longest time that might be taken if the activity takes longer than expected

Use the formula below to calculate the time for each project stage:

PERT Formula