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Chapter 9. Understanding Resource Schedu... > Understanding Effort-Driven Tasks

Understanding Effort-Driven Tasks

You saw in the previous sections that if a task is marked as Fixed Work and you change the number of units in a resource assignment, Project leaves the work amount unchanged and adjusts the duration of the task. If you increase the units, Project decreases the duration. What do you want Project to do if you increase the number of resources assigned to a task by listing more resource names to work on the task? That constitutes more units also. The answer depends on the nature of the work for the new resources.

As an example, suppose that Sam and Bob are individually named resources (not members of a group resource) and that it's reasonable to expect them to be able to load 100 boxes into a delivery van in 1 hour. Each man has to move 50 boxes to finish the task. If you were to give them some help by assigning Juan and Bill to help with the task and you add their names to the list of assigned resources, each of the four men would have only 25 boxes to move, and the task could be finished in half the time. The amount of work or effort involved in completing this task is fixed, and increasing the number of resources who are named to work on the task should reduce the time it takes to complete the task. In this case, you would want Project to manage the calculations just like it did for increasing the units of a single resource.


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