Project Evaluation and Review Technique (PERT)

Project Evaluation and Review Technique (PERT)#

PERT (Project Evaluation and Review Technique) CPM (Critical Path Method) immediate predecessors immediate successor Project Networks

activity-on-arc (AOA) activity-on-node (AON)

critical path

project duration

earliest start time
earliest finish time

latest start time latest finish time

slack

forward pass backward pass

Beta distribution

Most likely estimate Optimistic estimate Pessimistic estimate

A PROTOTYPE EXAMPLE#

Project Networks#

Scheduling#

Uncertainty in Project Duration#

Notation#

  • \(o\): Optimistic estimate

  • \(p\): Pessimistic estimate

  • \(m\): Most likely estimate

\[ \sigma^2 = \left(\frac{p-o}{6}\right)^2 \]
\[ \mu = \frac{o+4m+p}{6} \]

R. H. Pleguezuelo, J. G. Pérez, and S. C. Rambaud, “A note on the reasonableness of PERT hypotheses,” Oper. Res. Lett., vol. 31, no. 1, pp. 60–62, Jan. 2003.