From Longman Dictionary of Contemporary Englishtried and tested/trusted/truetried and tested/trusted/trueDEPEND/IT DEPENDSa tried and tested method has been used successfully many times tried and tested safety procedures → tried
Examples from the Corpus
tried and tested/trusted/true• After all, these methods are tried and tested.• Some parts of the blueprint will have been tried and tested, and found to be reliable.• These have the advantage of being tried and tested and involve lower cost.• Look for the more creative solution - the tried and true don't always bring the best results.• Disposable workers Modern methods of super-exploitation, tried and tested in the Third World, are coming home to industrialized countries.• Alternatively you could pick up a pinstripe suit from tried and trusted Marks & Spencer.• Others stick to the tried and tested method with a sponge.• The genre is tried and true, of course, from Animal House to Reality Bites. 