What is kaizen?
Kaizen means continuous improvement through many small changes made by the people closest to the work. Popularized by Masaaki Imai and practised at Toyota for decades, it is less a method than a habit: notice a problem, try a simple fix, check that it works, make it the new standard. Each kaizen is small; hundreds a year transform a workplace. Kaizen builds on 5S and standard work, which make problems visible and give improvements a place to stick.
What goes on a kaizen card
| Section | What to write |
|---|---|
| Title and details | A short name, the area, who made it, the date, a category (safety, quality, productivity, cost, ergonomics, environment) |
| Problem | What was wrong, in the words of the person who experienced it |
| Before | How the work was done, with facts and numbers (and a photo on the board) |
| After | What changed and how it works now |
| Benefit | Time, money, safety, quality or ergonomics, quantified where possible |
Kaizen examples
- Shadow board for changeover tools: tools moved from a drawer 15 m away to a shadow board on the press, saving 6 minutes on each of 500 changeovers a year: 50 hours, $2,250.
- Gravity roller rack: housings delivered at waist height instead of on a floor pallet; 6 seconds and one bend saved on 96,000 parts a year: 160 hours, plus far less strain on operators' backs.
- Pre-printed reconciliation table: a simple form change cut batch record errors by 88%, worth about $12,000 a year in QA rework and release delays.
Building a kaizen culture
- Make it easy: one page, a few minutes to submit, decisions in days, not months.
- Let people implement their own ideas with a small budget and support from maintenance.
- Recognize every kaizen, not just the big ones; post the cards on a board.
- Go and see: leaders on gemba walks ask about problems and ideas.
- Scale up when needed: bigger problems go to a kaizen event or an A3.
How to use this Kaizen Report tool
- Name the kaizen. Click the dark header to enter the title, area, owner, date, category and status.
- Describe the problem. Click Problem and state what was wrong in one or two sentences.
- Show before and after. Click Before and After to describe the situation before the change and how it works now.
- Quantify the benefit. Click Benefit and enter the minutes saved each time, how often a year and any other savings.
- Keep a kaizen log. Add every improvement to the log below; totals show the yearly hours and savings of implemented kaizens.
- Share it. Export the kaizen card to PNG or PDF for the improvement board, or the whole log to Excel.
Frequently asked questions
What is kaizen?
Kaizen (Japanese for "change for the better") is the practice of continuous, incremental improvement by everyone, every day. Instead of waiting for big projects, people who do the work make small, low-cost improvements to their own processes, and these add up to large gains over time.
What is a kaizen report or kaizen card?
A kaizen report (also called a kaizen card, kaizen form or quick kaizen) documents one improvement on a single page: the problem, how it was done before, what changed, and the benefit. It is used to share the idea with other areas, to recognize the person who made it and to track the savings.
What is the difference between kaizen and a kaizen event?
Kaizen is the everyday habit of small improvements, usually by individuals or small teams in their own area. A kaizen event (or kaizen blitz) is a focused 3 to 5 day workshop where a cross-functional team makes a larger improvement to one process.
How do you calculate the savings of a kaizen?
For time savings: minutes saved each time × number of times a year ÷ 60 × labour rate. Add other yearly savings such as scrap, material or energy. Be conservative, and count only implemented improvements. Many benefits (safety, ergonomics, morale) are real but not easily priced; record them in words.
How many kaizens should a team make?
World-class lean organizations report several implemented ideas per employee per year, many of them very small. The number matters less than the habit: make it easy to submit an idea, implement quickly, and recognize the people involved.
What makes a good kaizen?
It solves a real problem the person experiences, is implemented quickly and cheaply by the people who do the work, has a clear before and after (photos help), and is standardized so the improvement sticks and can be copied to similar areas.