It's known in other industries as "Root cause analysis"
A classic example being the Apollo 13 explosion.
Why? LOX tank exploded
Why? Because Kapton insulation was used on some of the wiring, which can explode.
Why? Because the voltage on that wiring changed from 15-->65v and no one altered the insulation thickness.
Why? Because the change control management system (paper based IIRC) failed to track the change.
Which tells you a) Bad things happen if change management control fails b) Checking the CMC system might find other errors, starting with any other areas that change was not made.
I requested a small UI change in some in house software once. In theory, simpler than a print button.
Four hours later still not fully done.
Biting the hand that feeds IT
