It's why Scotty was always giving longer estimates that Kirk wanted, but Kirk was also able to require an emergency fix to save the ship. The estimate was buil

It's why Scotty was always giving longer estimates that Kirk wanted, but Kirk was also able to require an emergency fix to save the ship. The estimate was building in the time to get it done without breaking too much other stuff. For emergency things, Scotty would be dealing with that after the emergency. If your captain is always requiring everything be done as an emergency with no recovery time, you've got bigger problems.