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Schedulingaka: CPMaka: CPM schedule

Critical Path Method (CPM)

In Plain English

A mathematical scheduling technique that identifies the sequence of tasks that controls the project completion date.

Definition

The Critical Path Method (CPM) is a project scheduling algorithm that models project activities, durations, and logical dependencies to calculate the critical path, identify float, and determine the earliest and latest start and finish dates for all activities. CPM scheduling is required for most public construction contracts and is used as the foundation for delay analysis, schedule updates, and time impact assessments.

Why It Matters in Bidding

CPM is the analytical backbone owners use to evaluate whether your proposed duration is credible and to settle delay disputes after award. Estimators who understand CPM logic can spot unrealistic durations or missing dependencies in the bid documents and price acceleration, sequencing risk, and general conditions accordingly.

Example

Bidding a public project that requires a CPM baseline, the contractor's scheduler builds the activity network with logic ties and durations so the team can verify the 18-month period of performance is achievable before committing.

Related Terms

Critical PathFloatNetwork DiagramBaseline Schedule

Related Tools & Templates

Primavera P6Microsoft ProjectAsta Powerproject

Frequently Asked Questions

Most public agencies and many large private owners require a CPM baseline schedule as a condition of the contract, often within a set number of days after notice to proceed. The spec typically dictates software, activity coding, update frequency, and submittal format, so review those requirements before you bid.
CPM provides the framework for time impact analysis: schedulers insert delay events into the accepted schedule to measure their effect on the critical path and completion date. Because it isolates which delays were controlling and who caused them, CPM is the standard basis for proving or defending time-extension and acceleration claims.
The critical path is the controlling sequence of zero-float activities. CPM is the scheduling method that calculates it, along with float values and early and late start and finish dates for every activity. In short, CPM is the technique, and the critical path is one of its key outputs.

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