GMS 450 Chapter Notes - Chapter 6: Critical Path Method, Expressed Sequence Tag, Job Shop
23 Apr 2013
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Document Summary
In traditional pert/cpm, the rules of standard practice apply and the normal task duration estimate is made with the normal or standard-practice resource usage. Then a second estimate, referred to as the crash duration, is made based on the resources required to expedite the task. When making estimates for crashing, it is important that the resources are available. There is a set of activities, predecessors, normal task duration estimates, crash duration estimates, and estimates for normal cost and crash cost. One crash duration is marked with a single asterisk. For this activity, the task may be carried out in normal time or crashed one day at a time. Another activity is marked with a double asterisk in this case, the duration must be done one or the other; cannot be broken down into segments. The slope information for non-or-partially segmented activities is normally given in the slope chart. Slope = crash cost / crash time normal time.
