This factory tracked everything in fourteen spreadsheets. Inventory in one, orders in another, quality checks in a third. The owner spent Sunday nights reconciling them. Every error traced back to a copy paste between sheets. We rebuilt it as one system in three weeks. No code, just a database with the right forms. Every department enters data once, and the dashboards build themselves. The owner got his Sundays back. Here is the part nobody says out loud: spreadsheets are fantastic calculators and terrible databases. The moment more than one person writes to it, you have a system pretending to be a source of truth.