You're right - I was addressing mainly drawings. Our assembly drawings and BOMs are tied to the same number and revision. If a "clerical" change needed to be made to a BOM, well, I don't know what kind of change you could make to a BOM that doesn't impact it. Spelling error, that's about it. Anything adding or deleting lines in the BOM materially affects it and needs to be tracked with a revision.
If I understand your original post, you have an old electronic BOM that doesn't reference the assembly drawing number, which presumably is a different number than the BOM. If you're adding that missing number to the BOM, proper doc control requires that you revise it. Otherwise, you don't really have control, except when it's convenient. In my early days I would sometimes be tempted to cheat on things like this that seemed harmless. And I was bitten every time, causing some sort of confusion, frustration and extra time spent when someone else came across the information.
It wouldn't take much hallway conversation to take up more time and effort than the ECO would take to do it correctly.
If I understand your original post, you have an old electronic BOM that doesn't reference the assembly drawing number, which presumably is a different number than the BOM. If you're adding that missing number to the BOM, proper doc control requires that you revise it. Otherwise, you don't really have control, except when it's convenient. In my early days I would sometimes be tempted to cheat on things like this that seemed harmless. And I was bitten every time, causing some sort of confusion, frustration and extra time spent when someone else came across the information.
It wouldn't take much hallway conversation to take up more time and effort than the ECO would take to do it correctly.