Initially, Microsoft Project automatically assigns the Standard calendar to each resource in your project. The working days and time off defined on the project calendar are the default working days and time off for all resources. If this schedule applies to everybody on the project, you don’t need to create any other working times calendars. If, however, the schedule of one resource differs from others, you can create an individual calendar for that person. For example, you can specify the vacation days for a resource.
A resource calendar stores the schedule for one resource. It contains exceptions to the base calendar. An example of an exception is an individual resource’s vacation days, which usually differ from the vacation days taken by other members of the group. Adjust the resource calendar to accommodate individual vacations or part-time hours. Because each resource calendar is derived from a base calendar, any change you make to the base calendar is reflected in the resource calendars that depend on it.
When you assign a resource to a task, Microsoft Project uses the resource calendar to determine the resource’s work schedule. For example, if a week of vacation is specified on the lead designer’s resource calendar, Microsoft Project does not schedule work during that week.
To modify a working times calendar for an individual resource
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