OPS.10.2:4.6 - Reconstruct the affected remainder after a change

At the current time, retain actual starts, completions and ongoing occupations. Replace the changed duration, readiness, access window, required operation or commitment. Do not restart completed work or shorten an uninterrupted operation merely to recover the former finish date.

Follow the changed operation through both its successors and the resources it shares. A task outside its precedence descendants can still lose a resource window. Include resulting admission changes and downstream joins; widen the affected set until its remaining boundary conditions are unchanged.

Try retaining unaffected reservations and the useful parts of the former plan. Refit the affected work under those commitments. If that restricted repair fails, identify which still-changeable reservation or resource order could matter and compare a broader rearrangement with its coordination cost. Failure while preserving the old order excludes only that restricted repair.

Recompute completion times, feasible postponement windows and protected reserve. Compare them with the same recipient events and deadlines. Return the actionable difference: a changed start or allocation, reserve consumed, an obtainable operating remedy, a commitment needing reconsideration, or an unresolved scheduling choice. Retain unaffected model and calculation results whose premises still hold.