Once interviewed at a place which made sensors that was used a lot in the oil industry. Once you put a sensor on the bottom of the ocean 100+ meters (300+ feet) down, they're not getting serviced any time soon.
They showed me the facilities, and the vast majority was taken up by testing and validation rigs. The sensors would go through many stages, taking several weeks.
The final stage had an adjacent room with a viewing window and a nice couch, so a representative for the client could watch the final tests before bringing the sensors back.
Quite the opposite to the "just publish a patch" mentality that's so prevalent these days.
