
Knowledge Areas • 181
If there are oats, the information from the histogram can be used to
delay the start of various activities. A more balanced histogram may result.
6.7.6 Uncertainty Analysis
• Purpose
• Clarify how uncertainties aect dierent times.
Eort estimates include uncertainties. e most likely, the fastest, and
the longest durations have been obtained. A network diagram and PERT
can help to evaluate the critical path. (For more information on PERT, see
Section 6.8.11.) If the standard deviation and variance for each activity are
calculated, the standard deviation for the critical path of the entire project
period can be stud ...