Longest Path vs Critical Path
Many assume they are the same but they’re not.
Critical Path: Activities with zero or less (or defined) total float. Multiple critical paths can exist, each showing potential delays.
Longest Path: The single path that drives the project completion date. It reflects the overall project delay and forecasted finish.
In Primavera, filters distinguish both: “Critical” by float definition, and “Longest Path” by completion driver. Understanding this difference is essential for accurate schedule analysis and delay assessment.
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