In Plain English
Quick Answer
The longest chain of tasks in a project schedule where any delay will push back the completion date.
Definition
Definition
The critical path is the longest sequence of logically linked activities in a project network whose total duration determines the project's earliest possible completion date. Activities on the critical path have zero total float, meaning any delay to a critical path activity directly delays the project completion date. Identifying and managing critical path activities is the primary focus of construction schedule management.
Context
Why It Matters in Bidding
The critical path tells you which activities actually control the completion date, so it drives how you sequence subs, stage crews, and load your bid's general conditions and overhead duration. Misjudging it during bidding can lead to understated time-related costs or unrealistic milestone commitments that expose you to liquidated damages.
Example
Example
Before bidding, the estimator reviews the schedule and sees that the long-lead switchgear sits on the critical path, so he prices expedited submittals and an earlier procurement allowance to protect the completion date.
See Also
Related Terms
FAQ
Questions Contractors Ask
Why does the critical path matter when bidding a job?
It defines project duration, which sets your time-related general conditions, supervision, equipment rental, and bond costs. Knowing which scopes control the finish date lets you sequence subs realistically, price long-lead procurement, and avoid committing to milestones you cannot meet without acceleration costs.
Can the critical path change during construction?
Yes. As activities finish early or late and durations shift, float gets consumed and a previously non-critical chain can become the new controlling sequence. This is why schedule updates matter: the critical path is recalculated each cycle, and delay claims hinge on which path was controlling at the time.
What does zero float on the critical path mean?
Zero total float means those activities have no scheduling slack: any delay pushes the completion date out day-for-day. Non-critical activities carry positive float and can slip somewhat without affecting the finish. Managers focus protection, resources, and recovery efforts on the zero-float chain first.
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