What Is Kaizen Teian?
Kaizen teian (Japanese for "improvement proposal") is a system that captures, evaluates, and implements small improvement ideas from every employee. Unlike Western suggestion boxes that collect big ideas and send them to committees for months, kaizen teian targets small, quick improvements that the person who submitted the idea can implement themselves — often the same week.
At Toyota, the target is 50+ suggestions per person per year — not because each idea is revolutionary, but because the habit of looking for waste and proposing fixes is what builds a continuous improvement culture. The accumulation of thousands of small improvements is more powerful than a few big projects.
Small Ideas > Big Ideas
Traditional suggestion programs fail because they wait for big, high-value ideas — which are rare, take months to evaluate, and rarely get implemented. Kaizen teian flips this: encourage many small ideas, implement them fast, and build the habit. A plant of 50 people generating 20 ideas each per year = 1,000 small improvements annually. That compounds.
Designing a System That Works
What Makes a Good Suggestion?
| Good Suggestions (Encourage) | Scope |
|---|---|
| Move the parts bin 2 feet closer to reduce reaching | Implementable today, by the operator |
| Add a shadow board for tools at my station | Small purchase, big visual impact |
| Change the order of two process steps to reduce walking | Standard work update, supervisor approval |
| Add a label to the switch that gets confused with the one next to it | Error-proofing, immediate |
| Share a technique I learned that speeds up changeover | Knowledge sharing, SMED related |
Why Most Suggestion Programs Fail
✅ Kaizen Teian (Works)
- Many small ideas encouraged (quantity over quality)
- 48-hour response from supervisor
- Submitter implements their own idea
- Recognition for participation, not just savings
- Visual tracking board, reviewed at T1 meetings
❌ Suggestion Box (Fails)
- Waiting for "big ideas" worth a committee review
- Ideas disappear into a black hole for months
- Committee evaluates ROI — rejects most ideas
- Only reward ideas with proven dollar savings
- No visibility — people forget the system exists
Metrics
| Metric | Target | Why |
|---|---|---|
| Suggestions per person per year | 12+ (monthly), stretch: 50+ | Measures engagement and habit |
| Implementation rate | 80%+ | If most ideas are rejected, people stop submitting |
| Average days to close | <7 days | Speed maintains momentum |
| Participation rate | 80%+ of workforce submitting | Not just a few enthusiasts — everyone contributes |
🎯 Key Takeaway
A working suggestion system is the heartbeat of continuous improvement culture. Make it easy to submit, fast to respond, and let the person implement their own idea. Chase volume, not perfection — 1,000 small improvements per year from your workforce will outperform any consulting engagement. The habit of seeing waste and proposing fixes is the most valuable capability you can build.
Interactive Demo
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