Microsoft Office Tutorials and References
In Depth Information
Control task scheduling with task types
Control task scheduling with task types
You might recall from Chapter 6, “Assigning resources to tasks,” that Project uses the
following formula, called the scheduling formula , to calculate a task’s work value:
Duration × Assignment Units = Work
Here, assignment units are normally expressed as a percentage. Remember also that a task
has work when it has at least one work resource (people or equipment) assigned to it. Each
value in the scheduling formula corresponds to a task type. A task type determines which of
the three scheduling formula values remains fixed if the other two values change.
The default task type is fixed units : If you change a task’s duration, Project will recalculate
work. Likewise, if you change a task’s work, Project will recalculate the duration. In either
case, the units value is not affected.
The two other task types are fixed duration and fixed work . For these task types, Project uses
a timephased field called peak units when responding to schedule changes.
For a fixed-work task
You can change the assignment units value and Project will recalculate the duration.
You can change the duration value and Project will recalculate peak units per time
period. The assignment units value is not affected.
TIP You cannot turn off effort-driven scheduling for a fixed-work task. If you need a
refresher on effort-driven scheduling, see “Controlling work when adding or removing
resource assignments” in Chapter 6.
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For a fixed-duration task
You can change the assignment units value and Project will recalculate work.
You can change the work value and Project will recalculate peak units per time period.
The assignment units value is not affected.
Project also keeps track of the highest peak units value per assignment. This value is stored
in the Peak field, which is explained later in the chapter.
 
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