The investigation and location of faults in machinery and equipment.
1963 February, “Diesel locomotive faults and their remedies”, in Modern Railways, page 103:
Many of the faults reported in all categories should have been cleared by systematic fault-finding. Once a system of fault-finding has been laid down, staff must be made familiar with it and must follow the correct sequence of diagnosis step by step in the way set out in a fault-finding chart.
