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Flash Card
Concept
Critical Path Method (CPM)
Domain
Process
Task
Plan and Manage Schedule
Definition & Key Concepts

The Critical Path is the longest sequence of activities in a project schedule that determines the shortest possible duration to complete the project.

Key Characteristics
  • Float/Slack: Activities on the critical path have Zero Float (TotalFloat = 0).
  • Risk: Any delay in a critical path activity will delay the entire project.
  • Focus: Helps project managers identify which tasks need the most oversight.
The Formula
To calculate float for any non-critical activity:
TotalFloat = LateStart (LS) − EarlyStart (ES)
OR
TotalFloat = LateFinish (LF) − EarlyFinish (EF)
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