How do I calculate average Cycletime?

That is providing the average.

You are adding up the cycle time for each zone in the formulas below (with the SUMIF).

Disregard my last comment.  :P

I will look more later, unless somebody else posts before I do, which is fine.

I think there's something funky with the original averaging ...

Here I used AVERAGEIF and AVERAGE instead, and it seems reasonable to me.
Cycletime-Avg-per-Zone-EE-2-1-.xls

Hi, BusyMama.

This looks like the right answer.  I like AVERAGEIF (never used it before).  What is the prefix (_xlfn.)??

Gary

Experts:

This AVERAGEIF doesn't work in Excel 2003.  Creates #NAME? errors.

What would?

Gary

AVERAGEIF debuted in Excel 2007.  You need an array formula for earlier versions of Excel.  Assuming this goes into B10045:

{=AVERAGE(IF($A$3:$A$10037=A10045,$B$3:$B$10037,""))}

To enter an array formula, do not enter the curly braces, and hit Ctrl+Shift+Enter instead of Enter to finish it off.  Excel will then display those braces to indicate that it's an array formula.

Copy that down through B10051.

For "All", you can simply use:

=AVERAGE(B3:B10037)

Barry - thank you again for the "ordinary" formula and your thorough explanation, as usual.  I'm sorry my first example was missleading.

I'm always learning new formulas.  I like how EE saves previous questions for reference.

Thank you to others who attempted a solution.

Have a great weekend, wherever you are.

Gary