# Calculating number of resources need from fixed work and fixed duration

• ### Question

• I'm still trying to wrap my head around resources.

Example: I have a task that I know will take 400 man hours to complete. So, I set Project to Fixed Work. And I need to complete this task in a certain amount of time. Is there any way I can set the duration to a specific amount of time and have Project tell me how many resources I need to complete it in that time? Or something of that nature?

Thursday, July 17, 2014 1:34 PM

• Hi Sean,

Here is what you can do:

• In the task usage view,
• Create a task with fixed duration,
• Enter the duration,
• Split the screen and display the task/work form,
• Assign a resource (it could be a generic resource),
• Enter 400 hours in the work column of the task form (lower part)
• Insert the peak column in the upper part, it will give you how many resources are required for the task

Tip: in the schedule options, select "decimals" for the assign units.

See an example below. I have a 30d duration task, with 400 hrs of work. It gives me 1.67 resources needed.

Hope this helps,

Guillaume Rouyre, MBA, MCP, MCTS |

• Marked as answer by Thursday, July 17, 2014 2:09 PM
Thursday, July 17, 2014 2:06 PM

### All replies

• Hi Sean,

Here is what you can do:

• In the task usage view,
• Create a task with fixed duration,
• Enter the duration,
• Split the screen and display the task/work form,
• Assign a resource (it could be a generic resource),
• Enter 400 hours in the work column of the task form (lower part)
• Insert the peak column in the upper part, it will give you how many resources are required for the task

Tip: in the schedule options, select "decimals" for the assign units.

See an example below. I have a 30d duration task, with 400 hrs of work. It gives me 1.67 resources needed.

Hope this helps,

Guillaume Rouyre, MBA, MCP, MCTS |

• Marked as answer by Thursday, July 17, 2014 2:09 PM
Thursday, July 17, 2014 2:06 PM
• Thank you, that's perfect. Is there a way to also do this in Project Web App?
• Edited by Thursday, July 17, 2014 2:11 PM
Thursday, July 17, 2014 2:09 PM
• You're more than welcome Sean!

Which version are you using? 2010 or 2013?

You can add to your project view the type and unit fields, work and duration and do the same in PWA. Be aware that some fields are available in the assignment views and others in the task views.

Hope this helps,

Guillaume Rouyre, MBA, MCP, MCTS |

Thursday, July 17, 2014 2:41 PM
• I am using 2013.

I tried to do what you were describing, but I can't find a Units field. I think this is where I was having trouble before.

I can't post images yet apparently, so here is the best I can do:

i imgur com/Nd4aoKl.png

It also isn't already added. Am I looking in the wrong place?

Thursday, July 17, 2014 2:52 PM
• Nevermind, I found on another post that you can only add units to "Assignment" views. Got it.
Thursday, July 17, 2014 2:53 PM
• Indeed the unit field is available for the assignments views.

Hope this helps,

Guillaume Rouyre, MBA, MCP, MCTS |

Thursday, July 17, 2014 3:48 PM