Management Tutor
A Project Management Blog

Activity duration calculator

This page covers Activity duration calculator with example.

Pessimistic estimate (input1) :

Most likely estimate (input2) :

Optimistic estimate (input3) :

Activity duration (Output1):

Activity Std.Dev. (Output2):

Activity Variance (Output3):

Activity duration Equation

activity duration

As mentioned activity duration, activity standard deviation and activity variance can be estimated using three point estimate. The three point estimate takes P, M and O estimates for calculation of activity duration. Here P stands for Pessimistic, M stands for Most Likely and O stands for Optimistic.

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