Whose Fault It Is Quotes by Albert Einstein, Lee Child, Jan Carlzon and many others.

Curiosity has its own reason for existence.
Evaluate. Long experience had taught me to evaluate and assess. When the unexpected gets dumped on you, don’t waste time. Don’t figure out how or why it happened. Don’t recriminate. Don’t figure out whose fault it is. Don’t work out how to avoid the same mistake next time. All of that you do later. If you survive.
If anything goes wrong, the customer doesn’t care whose fault it is. He’s the one who’s going to suffer anyway.