Every company has one. A spreadsheet that started as a quick tracker and ended up running a department. It works, until the day it does not.

The risk is never the spreadsheet itself. It is that one person understands it, formulas break silently, and two people editing at once overwrite each other. None of that shows up until money or a deadline is on the line.

We treat the spreadsheet as a specification, not a mess. Every formula is a business rule someone chose for a reason. We document the rules, keep the history, and rebuild them as a system with validation, permissions and an audit trail.

The team keeps working the way they know. The difference is that the logic now lives in software, not in one person's memory.