How to Constraint A Schedule Wisely

Many of us use constraints which impost a date on finish or start of an activity/milestone especially on major event (i.e. equipment delivery date, subcontractor’s foundation completion date, contract award date, project completion date, etc. ) in schedule as Primavera P6 schedule date might be changing whenever we schedule. And it is not feasible to readjust those date changes again and again. In some cases, we might use hard constraints (e.g. Mandatory Finish) to monitor the dead line date as soft constraints (e.g. Start on or After, Finish on or After, etc.) don’t hold the dead line date.

But! There might be a problem when hard constraint (inflexible constraint) is used in the schedule.