UNDERSTAND THE CONCEPT
Critical-path analysis examines the network of dependencies that determines a project's completion. In a simple unconstrained schedule, the longest connected chain sets the earliest finish. Total float describes how much an activity can move without delaying the relevant completion milestone under the schedule's assumptions. Calendar choices, imposed dates and resource constraints can complicate the result, so a highlighted bar should be investigated rather than accepted as proof.
Check that the network contains the real prerequisites: drawings, procurement, access, construction, inspection and testing. Missing links can make an unrealistic finish look achievable. Update remaining durations using current evidence and examine near-critical paths as well as the current critical path. Accelerating one activity helps completion only when its dependency chain and resources allow the benefit to flow through. A short, low-cost approval can matter more to the finish date than a large activity running safely in parallel.
Questions to take back to your team
- Do dependencies reflect the actual prerequisites for startup?
- Are calendars and imposed constraints distorting float?
- Which near-critical path could become the next completion driver?
Further reading
Explore the primary references below. Requirements and applicability depend on your organization and jurisdiction.
