LOTO is fine as long as you have a small number of workers who are sure where they are going tomorrow but it was far from a sure system when IBM tried it. If the guys who LOed the equipment were there until it was restored to a safe condition and they could take their lock it was fine. You could even turn over a problem and swap locks fairly easily. The problem was who's lock do you leave on if the equipment is still in an unsafe condition and everyone goes home. If you guess wrong and the guy who's lock is attached ends up going somewhere else in the morning his lock might fall to the bolt cutter when they get things going. He also doesn't have a lock. They decided there would be a "facility lock" for these things but then they had a question of who holds that key, tag etc. It defeated the spirit of one man, one lock.
I will fight for a "within sight" disconnect every time.
