This recommended practice (RP) is intended to serve as a guideline, not a standard for owners and contractors to establish a common frame of reference and understanding when describing the level of detail for any construction project schedule. This RP identifies four schedule formats based on level of detail, and provides descriptions of schedule levels and the intended use of these schedules by project participants.

This recommended practice provides descriptions of the schedule levels methods with the intent to improve the understanding and communication among project participants and stakeholders involved with preparing and using project schedules. This recommended practice (RP) describes the schedule level methods that are prevalent in the construction industry today for reporting and communicating project schedule plans, results and forecast or “to-go” data to respective stakeholders. This RP excludes “turnaround projects”, and does not necessarily apply to line of balance or linear scheduling applications.