Assuming Project2003 Desktop version
Go to the resource sheet, double click the resource name. Pull the workng
time tab and make change there.
Remember to highligh the entire column for M-F so all dates change.
Key in new hours as needed.
By default, a resource calendar will override a calendar assigned to a task.
Just to be sure, go to the tasks where the part time resource is assigned.
Look at the task information (I just double click the task), pull the
Advanced tab and look at the calendars drop down.
If it is "None" then there should also be a greyed out box next to it that
is unchecked (you can't change it). Project will use the project calendar
(default is Standard under Project/Project Information...).
If there is a specfic calendar assigned, then look next to the calendar name
and be sure the box named "Scheduling ignores resource calendars" is
UNchecked.
That should do it
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Jim Aksel, MVP
Check out my blog for more information:
http://www.msprojectblog.com