Project Time Management includes the processes required to manage the project’s timely completion.

Distinguishing the project schedule presentation (schedule) from the schedule data and calculations that produce the project schedule is practiced by referring to the scheduling tool populated with project data as the schedule model. A scheduling model represents the plan for executing the project’s activities, including durations, dependencies, and other planning information, used to produce project schedules and other scheduling artifacts.

On some projects, especially those of smaller scope, defining activities, sequencing activities, estimating activity resources, estimating activity durations, and developing the schedule model are so tightly linked that they are viewed as a single process that can be performed by a person over a relatively short period.

The schedule management plan documents the Project Time Management procedures and their associated tools and techniques. The schedule management plan is a subsidiary plan of and integrated with the project management plan through the Develop Project Management Plan process. The schedule management plan identifies a scheduling method and scheduling tool, sets the format, and establishes criteria for developing and controlling the project schedule. The selected scheduling method defines the framework and algorithms used in the scheduling tool to create the schedule model. Some of the better-known scheduling methods include the critical path method and the critical chain method.

Project schedule development uses the outputs from the processes to define activities, sequence activities, estimate activity resources, and estimate activity durations in combination with the scheduling tool to produce the schedule model. The finalized and approved schedule is the baseline that will be used in the Control Schedule process. As the project activities are being performed, the majority of effort in the Project Time Management process will occur in the Control Schedule procedure to ensure the completion of project work on time.

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