Resources aren't at your beck and call 24/7. Team members take vacations, attend training and conferences, and get sick. In addition, team members may work part-time or work 4 long days and take Friday off. Incorporating nonworking time and specialized work arrangements makes a Project schedule more likely to forecast how the project will actually play out. In Project, calendars carve out working and nonworking times.
In Project, calendars define the days and times when people work and when they don't. Calendars are multitalented; you can apply a calendar to an entire project, individual resources, or specific tasks as described in Chapter 6 and Chapter 8. For instance, you can set up a calendar to indicate corporate holidays or factory closures, and use that calendar for all your projects. On the other hand, a resource calendar shows a team member's particular work schedule and time off.
Project comes with a few built-in calendars (Choosing a project calendar), and automatically applies the built-in Standard calendar to new projects you create. However, you can modify existing calendars or build completely new ones, and then apply them to custom fit your resources' work hours.
This section explains creating and customizing calendars in Project 2007. (Working with calendars has changed radically from the Project 2003 techniques you may be used to, as the box on Defining the standard work week for a calendar explains.) You'll also find a quick ...