This video walks through how early start, early finish, late start, and late finish dates are recalculated each time a schedule is updated, using a practical example where activities are progressed to different completion percentages on a given data date. It then shows the same logic applied directly in P6 on a live schedule update.

A solid grasp of how the forward and backward pass work during a schedule update helps planners master the foundations and better understand the outcomes that are produced by the scheduling software.