**6.4 Activity duration estimating**

*PERT (Program Evaluation Review Technique)* has an emphasis on meeting schedules with flexibility on costs and it can be drawn only on an AOA diagram, and therefore, can have dummies.


#### **Figure 4.** *Estimation.*

Notice how there is a long tail to this distribution making different than a normal distribution where the m would be an equal distance between the a and the b and would represent the 50/50 mark of a distribution (50% of sample times falls to the left of m and 50% of sample times falls to the right of m).
