On Exit (Lead Time)

[Gavin Douglas]

I have a fairly large model with something like 200 unique flow items –each representing a part. Each unique part or flow item is used say 300 times in the model. When the parts are released from the source they are all released at the same time. For example, at time 0 we release 300 of Part1 etc…. I want to figure out the lead time for each part. So (on exit) I do something like:

Count++; //Global variable
If (count==1) ExitTime= time();


I need that counter because 300 or so of these things will be released simultaneously. Problem- I will need 2 global variables- one for exit into model and other for entry into sink- for each part. That’s like 400 variables to keep track of. Is there a way to do this for both in and out of the model without the use of global variables?

Thanks