Definition
MBS TPM work manual's three executable contents: six-source identification (pollution, difficulty, failure, waste, defect, danger—six source categories, with Heinrich 300:29:1, totaling 330), five-point lubrication and three-stage filtration, and equipment version 5WHY (five preparation steps, 5W2H equipment version, failure principle explanation must include diagrams); improvement week follows the six-step cycle of historical data, teardown plan, problem discovery, root cause improvement, installation standard, and follow-up. Not a DBS standard.
In detail
Six sources turn 'minor defects are dormant failures' into six registrable source categories; each of the five lubrication determinations is an action (fixed point, fixed oil, fixed quantity, fixed period, fixed person) with three-level filtering for storage/issuance/oiling; equipment 5WHY requires structural diagrams for mechanical types, circuit diagrams for electrical types, and action diagrams for program types, and after asking from top to bottom, confirm in reverse from bottom to top without skipping. MTBF and MTTR are calculated directly from fault records.
Example in practice
Disassembly inspection registered 23 six-source items, of which 4 hazard sources were simultaneously entered into the safety hazard list; the equipment 5WHY for the drying tower switching valve failure prompted for a diagram supplement due to the missing pneumatic schematic. After supplementing it, the confirmed root cause was an overdue temperature controller causing gas overheating that deformed a gasket and jammed the ball seat; the long-term countermeasure was replacing the controller on a fixed service-life schedule.