Microsoft Office Tutorials and References
In Depth Information
Assigning work resources to tasks
The scheduling formula: duration, units, and work
After you create a task but before you assign a resource to it, the task has duration
but no work associated with it. Why no work? Work represents the amount of effort
a resource or resources will spend to complete a task. For example, if you have one
person working full-time, the amount of time measured as work is the same as the
amount of time measured as duration. In general, the amount of work will match the
duration unless you assign more than one resource to a task or the one resource you
assign is not working full-time.
Project calculates work using what is sometimes called the scheduling formula :
Duration × Assignment Units = Work
Let’s look at a specific example and find these values in the Task Form. The duration
of task 3 is one week, or five working days. For the new book launch project, five days
equals 40 hours. When you assigned Toni Poe to task 3, Project applied 100 percent of
Toni’s working time to this task. The scheduling formula for task 3 looks like this:
40 hours (the same as one week) task duration × 100% assignment units = 40 hours
of work
In other words, with Toni assigned to task 3 at 100% units, the task should require 40
hours of work.
Here’s a more complex example. You assigned two resources, Jane Dow and Zac
Woodall, to task 9, each at 100% assignment units. The scheduling formula for task 9
looks like this:
24 hours (the same as three days) task duration × 200% assignment units = 48
hours of work
The 48 hours of work is the sum of Jane’s 24 hours of work plus Zac’s 24 hours of
work. In other words, as currently scheduled, both resources will work full-time on the
task in parallel for its three-day duration.
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