CAPM Practice: Demonstrate an understanding of a project management plan schedule

The backward pass works from the project end date backward through the network to calculate Late Finish (LF) and Late Start (LS) for each activity. By working backward, the PM can identify which activities are connected to the final milestone and must be completed for the project to end on time. Combined with forward pass results, it reveals critical path activities.

**Why not B:** Float analysis determines how much schedule flexibility each activity has, but it does not specifically identify which activities must be finished before the project can end. Float analysis uses both forward and backward pass results, whereas the backward pass alone identifies the path from the end date back through the network.

**Why not C:** Resource leveling analysis adjusts the schedule to resolve resource conflicts by delaying activities when resources are over-allocated. It does not determine which activities must be completed before the project can end; it addresses resource constraints, not logical dependencies.

**Why not D:** A forward pass calculation works from the project start date forward to determine Early Start and Early Finish dates for each activity. It does not work backward from the end date to identify which activities must be completed for the project to finish on time.