What are Predecessors and Offsets

A “Predecessor” is an activity that must be completed by the time another activity starts.  For example, If Activity A is a predecessor of Activity B, then Activity A must finish at or before the time that Activity B starts plus an ““Offset””.  The Offset allows you to specify a minimum separation between activities.  If the Offset is negative, it represents the maximum overlap between A and B.  An activity may have any number of predecessors.  Therefore, a traditional precedence network can be specified such as those found in  PERT Charts or Critical Path Models (CPM).

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