Where it usually gets stuck

As long as the definition is written down nowhere and the origin cannot be traced, every discussion is won by whoever defends their version hardest.

The pilot proved it can be done, not that it should run. Support, ownership and data supply were not part of it, and those decide whether it reaches production.

Plenty of reporting, just not around the question that returns every Monday. So at the moment of deciding, a spreadsheet does the rounds again.

Not badly built, but no longer surveyable. A change that takes an hour takes three weeks, because working out what will break is the real work.

Access, retention periods and permissions have all been thought through. What is missing is the trail: which data went in, and who signed off.