The way that costs are measured for a task (or a task plan). There are three types of costs:
- Fixed cost A fixed cost is one that does not change regardless of a task's duration or how much actual work is completed.
- Per-use cost A per-use cost is one that is applied each time a resource is used. When a work resource is associated with a per-use cost, that cost is applied each time that resource is assigned work in a task plan. When a material resource is associated with a per-use cost, that cost is applied once.
- Rate cost A rate cost is one that is applied based on a duration (typically, per-hour). A rate cost is most often associated with a work resource and it is used to represent the units worked (typically hours) against a task in a task plan. There are two types of rates: regular and overtime.