Duration versus Work

• Question

• I have assigned two individuals to work a single task. The task should take a .5hr to complete. I assigned the Name[50%],Name[50%]. In the Gant Chart view, duration shows .5hr however work shows .38hr. Why? Shouldn’t duration be .5hr and work be 1hr?

Thursday, December 3, 2015 6:07 AM

• Hi,

When you say that the task should take 0.5h to complete, are you talking about a duration or a amount of work?

Then if the resource are assigned are 50% on a 0.5h task, their respective work will be 0.25h each one, thus 0.5h total. If you need the task .5hr to complete with 1h of work, then you need to assign both resource at 100%, so 0.5 each one on the task.

Here is the procedure to achieve what you want:

• create 2 resources (A and B)
• create a task with a duration of 0.5hr and set the task type as fixed duration or fixed work depending on what parameter you know as fixed.
• split your screen displaying the task form ("view" tab in the ribbon, click on "details")
• in the task form, select resource A and enter 50% in the unit column (do not press enter)
• select resource A and enter 50% in the unit column (do not press enter)
• the result will be a 0.5h duration task with 2 resources at 50% (0.25h each on the task), so 0.5hr of work
• if you do need 0.5h for the duration and 1hr for the work, then repeat the above procedure assign at 100% the 2 resources.

Hope this helps,

Guillaume Rouyre, MBA, MVP, MCC |

• Marked as answer by Friday, December 4, 2015 2:24 AM
Thursday, December 3, 2015 8:12 AM
• Bear014,

New users of Project are often confused about duration and work. In Project, duration is the span of time during which a task is executed by one or more resources. Work is the effort those resources will spend completing the task. If a single resource works full time on a task, then duration and work will be the same. The two metrics are related by what is known as the Project work equation:

Duration = Work/Units

John

• Marked as answer by Friday, December 4, 2015 2:26 AM
Thursday, December 3, 2015 3:48 PM

All replies

• Hi,

When you say that the task should take 0.5h to complete, are you talking about a duration or a amount of work?

Then if the resource are assigned are 50% on a 0.5h task, their respective work will be 0.25h each one, thus 0.5h total. If you need the task .5hr to complete with 1h of work, then you need to assign both resource at 100%, so 0.5 each one on the task.

Here is the procedure to achieve what you want:

• create 2 resources (A and B)
• create a task with a duration of 0.5hr and set the task type as fixed duration or fixed work depending on what parameter you know as fixed.
• split your screen displaying the task form ("view" tab in the ribbon, click on "details")
• in the task form, select resource A and enter 50% in the unit column (do not press enter)
• select resource A and enter 50% in the unit column (do not press enter)
• the result will be a 0.5h duration task with 2 resources at 50% (0.25h each on the task), so 0.5hr of work
• if you do need 0.5h for the duration and 1hr for the work, then repeat the above procedure assign at 100% the 2 resources.

Hope this helps,

Guillaume Rouyre, MBA, MVP, MCC |

• Marked as answer by Friday, December 4, 2015 2:24 AM
Thursday, December 3, 2015 8:12 AM
• Bear014,

New users of Project are often confused about duration and work. In Project, duration is the span of time during which a task is executed by one or more resources. Work is the effort those resources will spend completing the task. If a single resource works full time on a task, then duration and work will be the same. The two metrics are related by what is known as the Project work equation:

Duration = Work/Units

John

• Marked as answer by Friday, December 4, 2015 2:26 AM
Thursday, December 3, 2015 3:48 PM
• Thank you.
Friday, December 4, 2015 2:25 AM
• Thank you
Friday, December 4, 2015 2:26 AM
• Bear014,

You're welcome and thanks for the feedback.

John

Friday, December 4, 2015 3:25 PM