The purpose of corrective action is to bring a schedule or project back on track. This can involve root-cause analysis and schedule or budget adjustments as well as expediting.
Once a change or need for corrective action is determined, the project manager must revisit and perform the following planning tasks again:
Planning— Project plans need to be revisited to determine how the corrective action or change will fit into the project.
Budgeting— Many changes or corrective actions involve tradeoffs between cost, scope, and time.
Integrated change control— Scope, quality, time, and cost all need to be reviewed in light of the change or corrective action. Each area's plans and change-control systems need to be updated ...