# Resource Availible % and Task work %

• ### Question

• All,

I am somewhat confused about how the cost for a resource assigned to a task is calculated.  Something seems counter intuitive to me on this.  Here is the example situation

I have three Resources:

Test 100%
Test 85%
Test 50%

If Test 100% is available 100% of the time, Test 85% is available to work a max of 85% of the time, and Test 50% is available to work a max of 50% of the time and they all use a standard 8 hour calendar and are paid \$10 / hr. ; why is it that when Project calculates the cost of a resource that's task is 25% of their time, all of the resources have the same total cost?

Example:

Task 1 (8 hrs.) - Test 100% [25%] = \$20.00

Task 2 (8 hrs.) - Test 85% [25%] = \$20.00

Task 3 (8 hrs.) - Test 50% [25%] = \$20.00

Why would the cost be the same if the available time to work on the project is a different % of the total available working cost?  Is it because it is based on \$ / hr.?

Thanks,

Mike

Monday, November 18, 2013 3:33 PM

• Hi Mike,

You have to understand how Project works and deals with % of availability.

Eventhough you specified in the resource parameters that he or she is available à 85% of his time, if he/she is allocated at 25% on a project assignment, it is 25% of 100% (100% of the working hours defined in the resource calendar), and NOT 25% of 85%.

Meaning that it is normal that 3 resources with the same standard rate allocated on a 8hrs tasks will have the same assignment cost, eventhough they have different maximum availability.

In other words, the PM should calculate on his side how many hours the resource will work on the task.

The % of availability will be used to show that resources are over allocated.

Hope this helps.

Guillaume Rouyre - MBA, MCP, MCTS

• Marked as answer by Monday, November 18, 2013 8:13 PM
Monday, November 18, 2013 3:43 PM
• en1701 --

The Cost for a resource assigned to a task is calculated as their Standard Rate multiplied by the number of hours they are working on the task.  The software does not include factors such as the resource's Max. Units or Assignment Units.  It is a simple calculation of Work x Standard Rate.  Hope this helps.

Dale A. Howard [MVP]

• Marked as answer by Monday, November 18, 2013 8:13 PM
Monday, November 18, 2013 3:44 PM

### All replies

• Hi Mike,

You have to understand how Project works and deals with % of availability.

Eventhough you specified in the resource parameters that he or she is available à 85% of his time, if he/she is allocated at 25% on a project assignment, it is 25% of 100% (100% of the working hours defined in the resource calendar), and NOT 25% of 85%.

Meaning that it is normal that 3 resources with the same standard rate allocated on a 8hrs tasks will have the same assignment cost, eventhough they have different maximum availability.

In other words, the PM should calculate on his side how many hours the resource will work on the task.

The % of availability will be used to show that resources are over allocated.

Hope this helps.

Guillaume Rouyre - MBA, MCP, MCTS

• Marked as answer by Monday, November 18, 2013 8:13 PM
Monday, November 18, 2013 3:43 PM
• en1701 --

The Cost for a resource assigned to a task is calculated as their Standard Rate multiplied by the number of hours they are working on the task.  The software does not include factors such as the resource's Max. Units or Assignment Units.  It is a simple calculation of Work x Standard Rate.  Hope this helps.

Dale A. Howard [MVP]

• Marked as answer by Monday, November 18, 2013 8:13 PM
Monday, November 18, 2013 3:44 PM
• Thank you Guillaume and Dale.  I wasn't 100% positive on that, but you were able to confirm my suspicions.
Monday, November 18, 2013 3:58 PM