Hi all.  I'm just starting with MS Project, and am encountering an issue with costs.  I have created a task and assigned one of my resources to the task.  The resource will only commit a certain percentage of his time to the task.  In my case, the duration of the task is  4 days, while the resource will only commit 2 hours to it.  The percentage is then 2/96 = 2.08333%.  But Project rounds that to 2%, resulting in a large (~25%) error in the calculated cost.  Is there a way to carry this out more accurately?

Thanks in advance.

Hi,

If the resource is assigned to other tasks which is conflicting with current task, this issue may occur.

We may click Assign Resources button under Resources tab, find the resource from the list, then double click it to see if the resource is assigned to other tasks that causes a conflict.

In addition, we may also try to create a new project, add the resource to see if this issue continues.

Regards,

Steve Fan
TechNet Community Support

Thanks for the reply.  But there are no other resources on the project.