Being a adjuster trained by Otis for over 20 years. Jumpers were mandatory for mods , new construction etc.Otis uses bright green or bright Orange Jumpers tagged with what was jumped. This in my mind is the best policy. Any jumper you would put on a door/gate switch should be around your neck. You jump it out with you standing in the jumper. The jumper leaves when you leave. I know that any elevator mechanic in his right mind would not jump any door/gate out and leave the building. I have witnessed building maintenance workers placing jumpers on safety circuits on shut down elevators. I have lost my mind on these people. Many of good mechanics have been blamed for something they never did. This does not console family of the dearly departed. But until the accident is investigated properly all we can do is assume.
Assumption is the mother of all F#$% UPS