Resource Planning, Loading, and Leveling
This domain tests how resources are assigned to activities, how histograms expose peaks, and how leveling differs from smoothing. CAPES expects you to know that leveling is resource-limited scheduling and may extend the project, while smoothing is time-limited and preserves the finish date. You must also recognize resource calendars, availability constraints, and the effect of resource decisions on critical path and float.
Core concepts
- Resource loading assigns labor, equipment, or crews to activities and produces a time-phased histogram.
- Resource leveling resolves over-allocation by shifting or splitting activities, often within float first, then by extending duration. It respects resource limits but may change the critical path.
- Resource smoothing reduces peaks without extending the project finish; it may use float but does not delay the completion date.
- Resource calendars define availability, shifts, and holidays. A resource constraint is different from an activity date constraint.
- Priority rules for leveling include critical path first, minimum float, earliest start, and shortest duration.
Worked example
Two activities both require the only crane. A runs days 1–3 and has 2 days total float. B runs days 2–4 and is critical. Without leveling, the crane is over-allocated on days 2–3. A can be shifted to days 4–6 using its float, so B keeps days 2–4 and the project finish is unchanged. If A had zero float, shifting A would extend the project by 2 days unless the crane constraint is resolved by adding a second crane or changing methodology. The key check is whether the move consumes float on a critical or near-critical path.
Traps that cost marks
Leveling without rechecking the critical path; confusing smoothing with leveling; assuming resource calendars are the same as activity calendars; and ignoring the cost of adding resources. Another trap is leveling a non-critical activity into a critical path and then claiming no schedule impact without recalculating float.