Task estimation for pert charts:

Task estimation for pert charts:


It is an analysis techniques can be used when the individual task times estimates are fairly uncertain. Instead of putting a point estimate for the duration estimate PERT uses three times estimates.


Most likely


Formula example: (optimistic time+4X most likely time+ Pessimistic time)/6

(8 workdays+4*10work days+24 work days)/6 =12 Days

Where Optimistic time= 8 Days

Most likely time = 10 days

Pessimistic time = 24 days

So most likely time will be 12 days

Estimating duration this way allows managers to calculate a more realistic project schedule.


PERT charts are an excellent training tool for a project controls person to truly understand the underpinnings of a schedule,” says PMFocus’s Patterson.


PERT charts help project teams visualize the order of tasks, milestones and phases within a project. Illustrating the project schedule makes it easy to identify tasks as one of two types:

  • Dependent, or sequential tasks
  • Non-dependent, or concurrent tasks

This allows managers to coordinate work across teams and departments more effectively.

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