⚙️ Lean Architect · Tyshchenko Lean Academy

TPM — Total Productive Maintenance

Total Productive Maintenance — the foundation of equipment productivity

“Improvement has no end. It is an endless journey toward perfection.”
— Eiji Toyoda, President of Toyota, a driving force behind TPS and its maintenance culture
TPM DEFINITION
TPM = Preventive + Productive + Autonomous maintenance
A systematic approach to preventing breakdowns by eliminating small problems — the root causes of wear and equipment stoppages
🎯 Zero breakdowns
✓ Zero defects
⚡ Zero losses
👥 Everyone involved
The iceberg of problems — why TPM is necessary
🔴 The visible part — where maintenance focuses its effort
Breakdowns and failures
Equipment stoppages
Product defects
Maintenance is always “firefighting” — and never catches up
~
🔵 The hidden part — root causes nobody pays attention to
▸ Contamination from dust and consumables
▸ Worn parts and oil leaks
▸ Neglect and equipment overload
▸ Rust, deformation, hairline cracks
▸ Overheating and excessive vibration
TPM attacks right here — 100% of operators watch the small things
Why the “endless firefighting”: staff don’t see the link between small issues and breakdowns · the system is built to fix consequences · maintenance and production live in different worlds
The 6 pillars of TPM
1
Planned maintenance
Regular diagnostics and repair on a predictable schedule. Replace before failure — not after
2
Autonomous maintenance
← KEY PILLAR for the maintenance team
Operators care for their own equipment: inspection, tightening bolts, changing oil, taking readings. This frees mechanics for complex jobs
3
Data collection and analysis
A system for collecting and analyzing data on equipment failures and operating parameters. The basis for predictive maintenance
4
Focused improvement
Expert teams attack specific components and failure points. Goal: reach the best possible equipment performance
5
Training and education
Building maintenance skills. Staff know the root causes — not just the symptoms
6
Quality maintenance
Building quality into the equipment itself. Improvement teams eliminate the causes of defects at the machine level
🔑 KEY SUCCESS FACTOR FOR TPM
100% OPERATOR INVOLVEMENT in maintenance (simple tasks)
Mechanics can’t watch everything. But if every operator owns “their” equipment, hundreds of small problems get caught every day — before they turn into breakdowns.
Toyota Motor Corporation
Japan · Origin of TPM culture · 1951
Context and problem
Late 1940s. Toyota was building trucks and constantly stopping for repairs. Taiichi Ohno asked: “Why do we repair after a breakdown? Why not before it?” Mechanics were buried in “fires” — with no time left for prevention.
The TPM solution
Toyota introduced the principle “operator = first mechanic.” Each operator is responsible for 5S on their equipment, daily inspection, lubrication, and tightening bolts. Mechanics handle complex maintenance and improvements — not routine inspections. OEE became the key metric.
What’s specific to Toyota
At Toyota plants, every machine has a “health record” — a log where the operator notes its condition every shift: vibration, temperature, sounds, leaks. Anomaly → tag → a mechanic arrives within 2 hours. A 10-minute line stop for prevention — instead of an 8-hour breakdown.
Results
85%+
OEE at Toyota’s leading plants (World Class ≥85%)
-90%
Fewer unplanned stoppages after 5 years of TPM
0
Planned stops longer than 1 hour at the Georgetown plant in a year
Robert Bosch GmbH
Germany · Automotive components · Over 400 plants
Context
In the 1990s, Bosch had a problem typical of large manufacturers: plants in different countries performed at very different levels. OEE ranged from 45% to 73%. There was no maintenance standard. Every plant “did it its own way.”
The solution — BPS (Bosch Production System)
Bosch built its own TPM system within BPS. Key elements: standardized autonomous maintenance sheets for each equipment type · interval-based planned maintenance (hourly, daily, weekly, monthly) · a fault tag system: yellow (operator) → red (mechanic).
Operator training
Bosch introduced a mandatory 40-hour “Operator-Technician” course. After it, an operator can change oil, check a belt, replace filters, and read vibration and temperature data. A mechanic no longer comes over just “to tighten a bolt.”
Results across plants
+22%
OEE growth in the first 3 years of TPM (from 58% to 80%)
-41%
Less changeover time with SMED + TPM
€800M
Documented savings over 10 years of the BPS program
Nestlé S.A.
Switzerland · Food industry · 400+ factories · 189 countries
What’s specific to the food industry
TPM in the food industry carries a special responsibility. A line stop means not only lost productivity but also a risk of microbiological contamination at restart. Nestlé found that 60% of line stops were caused by POORLY CLEANED equipment components — not breakdowns, but dirt.
Nestlé TPM (Nestlé Continuous Excellence)
Nestlé merged TPM and sanitation control into a single system. Every operator performs a “TPM + sanitation check” — inspecting the spots where product and dirt build up. 5S was extended to 5S+S (Safety, Sanitation). Hygienic-design fasteners that don’t trap dirt. Poka-Yoke for covers and caps.
Nestlé’s key insight
“If operators clean the equipment, they learn it. If they learn it, they hear abnormal sounds and see abnormal oil color. Cleaning = inspection = early diagnosis.” This philosophy became the basis of their global TPM.
Results at the factories
-73%
Fewer unplanned stoppages due to contamination
+18%
OEE growth on pilot lines in one year
-35%
Lower maintenance costs
Illustrative case: a mid-size food plant
Illustrative example · Ready meals and frozen products · Small/mid-size scale
The problem — a mid-size food manufacturing plant
A typical mid-size food plant. Equipment: forming lines, cooking ovens, packaging machines. OEE = 58%. Main losses: unplanned stops on the forming line (hydraulic and pneumatic failures) + quality problems caused by unstable oven temperature. Three mechanics for the whole plant — always busy.
How TPM was introduced (a 12-month rollout)
Weeks 1–6: The team picked one pilot line and listed its 5 most failure-prone points. Each point got a one-page autonomous maintenance sheet with photos of its “normal” state.

Months 2–6: Two 2-hour operator training sessions. A 5-minute check at the start of every shift. Anomaly tags hang right on the machine; mechanics clear them at the daily stand-up meeting.

Months 7–12: Maintenance intervals based on run hours instead of the calendar. Wireless temperature loggers in the ovens send an alert when readings drift.
Results after 12 months
58→67%
OEE on the pilot line
-40%
Unplanned stops due to hydraulics/pneumatics
+60%
More planned maintenance jobs completed (fewer “fires”)
Key lesson: Even a small plant without big investments makes steady OEE gains — if operators “make friends” with their equipment.
🔧 Autonomous maintenance — operator checklist
This is a typical per-shift checklist for a forming line operator. Check off completed items to see the shift’s progress.
Tasks completed
0 / 10
⚡ BEFORE THE SHIFT STARTS
🔄 DURING THE SHIFT (every 2 hours)
🏁 AFTER THE SHIFT
📊 Simulator — how TPM affects OEE
Move the sliders to see how TPM measures affect each OEE component:
🟢 Breakdown downtime (Availability) 15 min
0 min (no breakdowns)60 min (frequent breakdowns)
🟡 Organizational downtime (Performance) 20 min
0 min (ideal)60 min (frequent idle time)
🟣 Equipment-related defects (Quality) 3%
0% (zero defects)15% (critical)
—
Availability
—
Performance
—
Quality
Overall OEE
—
—
💭 Mentor’s tips for putting TPM into practice
1. Start with one piece of equipment
Don’t try to roll out TPM everywhere at once. Pick the ONE most problematic line. A 3-month pilot → results → scale up. Without a pilot, the team won’t trust it.
2. Make an operator checklist with pictures
Nobody follows a text-only checklist. Photograph each component in its “normal” state → the operator compares it with the photo. “Looks like the photo” = OK. “Doesn’t” = anomaly tag.
3. Measure OEE before and after — that’s your argument
Without numbers, TPM is just “another initiative.” Record OEE before launch. After 90 days, show the difference to the plant manager. OEE +8–12% in a quarter is a normal pilot result.
4. Mechanics are coaches, not doers of simple tasks
If mechanics do autonomous maintenance instead of operators, TPM hasn’t started. The mechanic’s role in TPM: teach, check, handle complex work. The operator’s: simple tasks every day.
The biggest mistake when rolling out TPM: creating one more piece of paper nobody follows. TPM only lives if mechanics go to the Gemba and check whether operators really do the inspection — and thank whoever found a problem first.
TPM — from American PM to the Japanese revolution
1
1951
Preventive Maintenance arrives from the US
The American PM concept reaches Japan along with the rebuilding of its industry. Japanese manufacturers learn for the first time that equipment can be maintained BEFORE a breakdown, not AFTER. Nippondenso (a Toyota supplier) is the first to introduce systematic PM.
2
1971
Nakajima’s revolutionary idea: involve the operators
Seiichi Nakajima at JIPM publishes TPM. The revolutionary idea: involve OPERATORS in maintenance. Until then, mechanics and operators lived in different worlds. Nippondenso receives the first TPM Prize. “Autonomous maintenance” is born.
3
1989
TPM Award — the West is shocked
JIPM launches the international TPM Award. Bosch, Ford, P&G, and Nestlé start implementing TPM. The shock: the OEE gap between Japanese and American plants is 35–40 percentage points. A “TPM fever” begins in the West.
4
Today
Predictive Maintenance — Industry 4.0
Vibration, temperature, and acoustic sensors analyze equipment in real time. But the foundation hasn’t changed: an operator who cleans their machine every day is a better sensor than any IoT device.