Failure:
In engineering, the loss of functions specified in the original design of parts is called failure. Failure includes complete loss of original function; The function is reduced, and there are serious injuries or hidden dangers. If you continue to use it, you will lose reliability and safety. The failure of mechanical parts is mainly due to (1) overall fracture, (2) excessive residual deformation, (3) surface damage of parts and (4) damage to normal working conditions.
Fault:
Fault: the phenomenon that the equipment "loses the specified function" or endangers the safety for some reason during the work.
The specified functions refer to the functions clearly specified in the technical documents of the equipment. Faults are sometimes called faults, or they may be the loss of equipment at work, but these faults can be repaired.