Microsoft Project 2007 offers three types of resources for projects—two old standbys and one particularly handy addition. Each resource type has its purpose and idiosyncrasies, so it's important to understand what each resource type represents and how it can affect your project. Here are the resource types in Project 2007, and what each one represents:
Work. Time is what separates work resources from other resource types in Project. For example, people and equipment are work resources, because you track their participation by the amount of time they spend. Whether you're assigning a cinematographer or an Imax camera array, your project tasks depend on when those work resources are available, and how much time they have. Of course, work resources cost something, but those costs are usually based on the amount of time you use the resource; like whether you pay some-one by the hour or the month, as shown in Figure 8-3.
Figure 8-3. Fields in the Resource Sheet may be blank or contain different types of information depending on the type of resource. For example, a work resource doesn't have a Material label, and costs are calculated initially as dollars per hour. Material resources have a cost per unit—per pound, gallon, or piece—and the Material label field defines the units. Cost resources receive a value only when you assign them to tasks.