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Topic guide · 24 articles

TPM and maintenance

Total productive maintenance (TPM) makes equipment reliability a shared job between operators and maintenance staff, instead of leaving it to the maintenance department alone. It is built on eight pillars that rest on a 5S foundation, with autonomous maintenance at its core: operators clean, inspect, lubricate and tighten their own machines and catch small problems before they become breakdowns. These guides cover TPM and its pillars, the maintenance strategies it works alongside, and how to measure and reduce downtime with OEE and the six big losses.

Also useful: Maintenance kaizen ideas, Downtime benchmark charts

Quick guides: Model area 90-day plans, Reducing machine downtime: a worked month

Also: Model area 90-day plans, Cost of downtime, Lean books with honest summaries

Picture gallery: Autonomous maintenance examples (24)

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Questions about tpm and maintenance

  1. Initial cleaning; eliminating contamination sources and hard-to-reach areas; setting provisional cleaning, lubrication and inspection standards; general inspection; autonomous inspection; standardization; and full self-management. The sequence was codified by the Japan Institute of Plant Maintenance, and each step builds the foundation the next one needs.

  2. Five common strategies are reactive (breakdown) maintenance, preventive maintenance, corrective maintenance, predictive maintenance and reliability-centered maintenance. Reactive maintenance fixes equipment only after it fails, which usually means more downtime and higher repair costs, although it can still make sense for non-critical equipment.

  3. Overall equipment effectiveness (OEE) measures how productive a piece of equipment is, calculated by multiplying availability, performance and quality. The six big losses (unplanned stops, planned stops, small stops, slow cycles, production rejects and startup rejects) break the lost OEE down further, so you can see which kind of equipment waste costs the most. Both come from Seiichi Nakajima's work on TPM.

  4. Planned maintenance works out what a job needs: which tasks to perform, how to carry them out, and the tools and parts to have ready. Scheduled maintenance decides when the work happens and who does it. The two go hand in hand, but they are not the same thing.

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