When production is down, you are obligated to repair the equipment. But analyze the causes and equipment condition to determine if this equipment is worth repairing ever again.
For example, a 400A breaker exhibits random tripping. You need this fixed, as soon as possible. You determine the quickest way to do that is to have the breaker expert who works for the electrical services firm you use to repair the breaker. He’s factory-trained on it, so you call him up. It turns out the arc chute was full of foreign matter and there were some other minor issues. His “golden touch” seems to have solved this problem.
But consider what this breaker went through. It opened under load multiple times. It operated under dirty conditions. How long before this breaker interrupts production again or, worse, fails to open?
Some things are expensive to replace. But they can be even more expensive not to replace.