The critical path is the sequence of activities that determines the overall project duration.
It represents the longest duration path through the network and typically has zero float unless delays or constraints introduce negative float.
PSP Study Guide References:
Critical path analysis is a foundational concept in schedule management, as covered extensively in the PSP guide.
Analysis of Options:
Option A: Correct. The critical path always has the longest duration.
Option B: Zero float is common but not universal due to constraints or delays.
Option C and D: Negative float describes specific scenarios but does not define the critical path universally.
Conclusion: The correct answer is A, as the critical path is the longest-duration path through the network.
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