Hi there!
I can help you out with this formula. So the inputs for the formula would be the 2 numbers set as start and finish process, right?
A few IF and COUNTIF statements should do the job I believe.
If you are interested, feel free to drop me a message any time and we can have a chat, I'll start right away :)
About me, I am an Industrial Engineer, with 6+ years of experience using Excel on a daily basis, so formulas and vba are current tools for me.
Have a nice day!
Martin