Why boards should rehearse the bad day

When I was in the RAF, exercises were part of normal life. Some were small: someone would try to follow you through a security gate, or turn up without a pass to see whether anyone would stop them. Others were anything but small. They went as far as battle damage repair on aircraft while wearing a full gas mask and NBC suit.

Every exercise had umpires. Their job was to watch, then tell us plainly what had gone wrong and what to try next time. I didn't always appreciate that at the time. Being told your best effort wasn't good enough stings.