Close enough for government work. It is not worth spending more time to perfect this. The phrase appears in print in 1962, in NASA reports on the first American orbital flights.
Close enough for jazz. This is the musicians’ version. It has been in print since at least 1937. That year Billboard printed it as a stock musicians’ joke, said after the saxophones tune up.
Good enough for who it’s for. The job was not done perfectly, but it was done well enough for the people it was done for.
Wiktionary labels the government phrase “humorous” and “disparaging.” A popular story says it began in World War II as praise for exacting standards. Members of the American Dialect Society searched for evidence and found “nothing to support” it.