The standard for project management

Project schedule. 

Described in Section 6.5.3.2. The project schedule shows the activities and their planned start 

and end dates to help determine when the resources need to be available and acquired.

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Resource calendars. 

Described in Section 9.3.3.3. Resource calendars document the time periods that each 

resource needed for the project is available for the project. Creating a reliable schedule depends on having a 

good understanding of each resource’s availability and schedule constraints, including time zones, work hours, 

vacation time, local holidays, maintenance schedule and commitments to other projects. Resource calendars are 

progressively elaborated and updated throughout the project. Once created as an output of this process, they are 

used as needed whenever this process is repeated.

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