=AVERAGE(IF((report_range="report
name")*(dept_range="department_name"),days_range))

which is an array formula, it should be committed with Ctrl-Shift-Enter, not
just Enter.
Excel will automatically enclose the formula in braces (curly brackets), do
not try to do this manually.
When editing the formula, it must again be array-entered.

--
---
HTH

Bob

(there's no email, no snail mail, but somewhere should be gmail in my addy)



"Mike" wrote in message
...
Ok. I am having trouble devising a formula for the following problem:

I have a table that has a column that identifies a report name (key), a
column entitled DEPARTMENT (report is assigned to), and the number of days
it
took for the report to be completed.

How can I average the amount of days it took reports to be completed for
each department, without actually sorting the table and creating a new
table?


Is there some LOOKUP formula or ARRAY formula that I can use to look for a
specific DEPARTMENT name, take a number in adajcent cell and add it into
an
average function for the rest of the cells that correspond to that
department
name?

Thanks for any help.