Great stories. Looks like most of you are more or less self-taught. It still amazes me how you guys can do what you do with Excel. I have used it since the mid 90's at work but never really had the time to truly learn the capabilities of this great program. Now I have a little more time on my hands and want to learn much more.

I am confident that most manufacturing facilities (my line of work) are not even scratching the surface of what can be done with Excel to improve productivity at their plants on the shop floor level. Entering some production numbers in a spreadsheet and printing it out for the boss is not exactly optimizing the process ;-)

Thanks for all of the responses so far and please keep them coming.