a procedure - When workers in fast food or retail follow the rules so tigh

When workers in fast food or retail follow the rules so tight that it slows everything down and makes the manager want to scream.

'I'm not going to make the coffee faster, I'm doing it by the procedure.'

'The procedure says I have to take 5 minutes between each customer.' 'That's not a procedure, that's a procedure.'

'I can't help you because of the procedure.' 'That's not a procedure, that's a procedure.'