Like I said, the 2-man rule is a solved problem. https://en.wikipedia.org/wiki/Two-man_rule https://en.wikipedia.org/wiki/Two-man_rule What does Bob do when h

Like I said, the 2-man rule is a solved problem. https://en.wikipedia.org/wiki/Two-man_rule https://en.wikipedia.org/wiki/Two-man_rule What does Bob do when he goes to the toilet? He asks Steve to cover him. So if you need 2 people to send an alert, when Bob is at the console, and Steve is secondary, when Steve has to go to the toilet, he asks Jill to cover him. Alternatively a backup authorization method could be used. It does mean having 3 people available at all times, but since there are life-safety implications of real alerts as well as false alerts, it seems like a reasonable safeguard to have.