Guides
Hiding a menu item is not a permission. What separates access control that works from access control that looks like it works.
Operations
Retail generates hundreds of small transactions and one daily question: does the cash in the drawer match the sales in the system? Here is what has to be true for the answer to be yes.
The hardest part of a second branch is not the stock. It is that every record now needs to know where it belongs, and the ones that do not know become invisible.