This would be shown as a finish-to-start with two-week lead". In accordance to PMBOK a lead is "the amount of time whereby a successor activity can be advanced with respect to a predecessor activity For example, on a project to construct a new office building, the landscaping could be scheduled to start prior to the scheduled punch list completion. This is an example of a lag in a Start-Start relationship. When building two walls from a novel design, one might start the second wall 2 days after the first so that the second team can learn from the first. PMBOK defines lag as "the amount of time whereby a successor activity will be delayed with respect to a predecessor activity". Both leads and lags can be applied to all 4 types of dependencies. The critical chain method necessitates taking into account resource constraint-derived dependencies as well.ĭependencies can be modified by leads, and lags. Since at least the mid-1980s, competent project managers and schedulers have recognized that schedules must be based on resource availability.
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