As promised, I put up a Discuss post for getting your input on the calculation of the effective location for an item.  I wasn't able to put tables in Discuss so I link out to a wiki page for that.  Please put your feedback in Discuss rather than on the wiki page itself.

https://discuss.folio.org/t/logic-for-calculating-effective-locations-for-items/1795

Thanks much!

Cate