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