This reminds me of a project I was remotely involved with: Airbus having to handle an aircraft order number above 5 digits as they were delivering their 10’000th aircraft to a customer.

This was a multi year project where we had to deliver software used to map risk and impact across the whole company.

Imagine the costs.

source: https://www.flightglobal.com/airlines/a320neo-line-adapts-to...