2.4 Schedule Compression & Resource Optimization

🎯 Key PMI PMP® Exam Takeaways

• Fast Tracking executes sequential critical path activities in parallel, saving time without adding direct cost, but increasing risk and rework.
• Crashing adds resources or overtime to critical path tasks, compressing time at the expense of increased project cost.
• Resource Leveling resolves resource overallocation and often extends the critical path and project completion date.
• Resource Smoothing optimizes resources only within available float, keeping the project completion date unchanged.

When project delivery dates must be accelerated to meet market windows or regulatory deadlines, project managers apply schedule compression techniques to critical path activities.

Fast Tracking overlaps activities that were originally scheduled in sequence. While fast tracking does not require additional direct financial investment, it introduces operational risk and potential rework. Conversely, Crashing injects additional resources—such as approving paid overtime or hiring specialized contractors—to shorten task durations, increasing total project costs.

When human or equipment resources are overbooked, resource optimization techniques are applied. Resource Leveling shifts activity start and finish dates to match resource availability, frequently lengthening the critical path. In contrast, Resource Smoothing shifts activities strictly within their available float limits, ensuring that the approved project end date remains intact.

⚠️ Common PMI Exam Traps

• Fast tracking non-critical path activities; compressing non-critical tasks does not shorten overall project duration.
• Believing resource leveling preserves the schedule end date; leveling is unconstrained by float and frequently delays the finish.