"James T. Kirk: How much refit time before we can take her out again? Montgomery Scott: Eight weeks, Sir, [Kirk opens his mouth] but ya don't have eight weeks, so I'll do it for ya in two. James T. Kirk: Mr.Scott. Have you always multiplied your repair estimates by a factor of four? Montgomery Scott: Certainly, Sir. How else can I keep my reputation as a miracle worker? James T. Kirk: [over the intercom] Your reputation is secure, Scotty."
January 1, 1970
https://en.wikiquote.org/wiki/Estimates