CAPM Practice: Determine how to document project controls of predictive, plan-based projects

The 8/80 rule is a guideline for decomposing the WBS to the appropriate level for scheduling. Work packages should be granular enough to be manageable (at least 8 hours — not so small that planning overhead exceeds the work) but not so large that they become unmonitorable (no more than 80 hours without a checkpoint). This guideline helps calibrate WBS decomposition for effective schedule control.

**Why not A:** The 8/80 rule has nothing to do with the ratio of critical path activities to total activities. The number of activities on the critical path is determined by schedule network analysis, not by a decomposition guideline.

**Why not B:** The 8/80 rule does not refer to percentages of total project budget. Work package sizing is about effort duration, not budget allocation percentages. Budget proportions are addressed through cost management, not WBS decomposition guidelines.

**Why not C:** The 8/80 rule has nothing to do with the number of resources assigned to activities. Resource assignment is determined during resource planning, while the 8/80 rule guides the appropriate granularity of work package decomposition in hours of effort.