OPS.10.2:2 - Problem

A dependency diagram can allow work to proceed in parallel while the same person must perform both branches. A resource total can fit a day while a continuous operation fits none of its open windows. A priority rule can produce a late plan even though another order meets the deadline.

A second error arises after a plan has been obtained. Its apparent spare time is spent independently by several participants, or a once-critical sequence continues to determine priorities after resource access has changed. The practitioner needs a construction that connects the proposed times, their feasibility, the reserve being used and the conditions requiring revision.