Sometimes testing is not enough
Especially when the information you are given about the installed system is wrong.
On a factory automation upgrade our people insisted on getting timings for every part, right down to solenoid actuation. We built a sophisticated test rig with all those times built in, then added extra to allow for slow or sticking ones, and as many failsafes as we could think of.
When we installed it the system wouldn't even start. One of those failsafes kicked in. We had been assured the vacuum system took 1 minute to get to a usable level - even though we had doubts and allowed for 2 minutes. It actually took at least 10, not helped by the fact there was a leaky pipe that was known about, but not by us.
Biting the hand that feeds IT
