Manual spreadsheets can't prevent inventory mistakes Most of the inventory problems I've seen didn't start with a bad process. They started with a spreadsheet that was 95% fine. That 5% is where the pain lives. Here's a scenario I've watched play out more than once. A team finishes a cycle count, someone keys the numbers in, and one row gets pasted over another. Nobody catches it because the sheet still balances — technically. Two weeks later, a 3PL client is short 200 units

Splitting your logistics between in-house and a 3PL sounds like a smart hedge until about the third time you're standing at the dock trying to figure out whose inventory number is right. That's usually when the cracks show. The problem isn't the model itself. Hybrid setups can work well — you keep tight control over your fastest-moving SKUs and let the 3PL handle the seasonal overflow or the awkward freight lanes you don't want to staff for. But the moment those two environ