# Actual Work vs Actual Duration

• ### Question

• What is the difference between Actual Work and Actual Duration?
Monday, June 16, 2014 9:20 PM

### All replies

• Sheldon --

You are assigned to Work 40 hours on a task.  To date, you have done 25 hours of work on this task.  Your Actual Work is 25 hours.

You are assigned to work on a task over a Duration or time span of 10 days.  So far, you have worked on the task during 5 days of the timespan.  Your Actual Duration is 5 days.

Hope this helps.

Dale A. Howard [MVP]

Monday, June 16, 2014 9:59 PM
• They are completely different, even though they appear to be measured in the same units.

A task can have a duration and within that duration there may be zero work or any amount greater than zero.

Duration determines how long a task will take, since it is the time between the start and the finish of the task.

Work is usually, but not always, what it takes to get the task done, and usually, but not always, determines how much the task will cost.

Before the task starts, the duration and the work are both "scheduled". There is no actual of either, and both are remaining. After the task starts, and after some work is expended on it, it accumulates some actual duration and some actual work, and some remaining duration and remaining work remains.
duration = actual duration + remaining duration
work = actual work + remaining work

... until all of both of them is actual and there is no remaining of either.

Duration is like the envelope. the work must occur inside the duration.
The actual work must occur inside the actual duration.

Hope this helps.

Monday, June 16, 2014 10:15 PM