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Kaizen: Small, Measurable Steps Instead of One Big Leap
What is Kaizen (continuous improvement)? We explain the compound effect of small improvements and the PDCA cycle from an engineering perspective, with a numerical example..
Kaizen comes from the Japanese words "change" (kai) and "good" (zen). small improvements every day that everyone participates in means. The one-sentence answer is that production efficiency often increases not with a single large investment, but with the combined effect of small adjustments that are measured, standardized and never stopped..
Most improvement projects require a major investment, a new machine or a radical line change. This expectation blocks the small but possible improvements that can be made every day. Kaizen attributes transformation to a habit, not an event..
How Kaizen Works?
Kaizen spreads improvement not to the expert team and the big project, but to everyone doing the work and daily practice. At its core is the cyclical experiment logic: Plan, Do, Check, Act (PDCA). Origin of this cycle, It is the learning-improvement model from Shewhart to Deming, cited by the Deming Institute.; Although Deming's own emphasis is on "Study" (PDSA) rather than "Check", the process in the field is the same: a change is tried on a small scale, its outcome is measured, if it works it is standardized, if it doesn't it is rolled back..
Kaizen does not reject major investment. It just says: you don't have to wait for big investment for improvement.
Why Small Steps Are So Powerful?
The power of small improvements is understood not by intuition, but by the compound effect. A process that improves by only 1% every day, after a year:
1,01³⁶⁵ ≈ 37,8
So theoretically it reaches roughly 38 times. The opposite is also true: a process that gets worse by 1% every day 0,99³⁶⁵ ≈ 0,03 decreases to almost zero. This calculation does not apply to one-to-one production — no process improves by 1% every day — but it shows the direction correctly: small and steady outperforms large and sparse over time.
In practice, this looks like trimming seconds off cycle time, simplifying a fixture, shortening a walking distance. Alone it is insignificant; decisive when overlapped.
What Does Kaizen Look Like in Engineering??
- Standard job: A job is defined by the best known method; improvement is made based on this standard. If there is no standard, improvement cannot be measured.
- Measurable target: Not "better", but "cycle time from 42s to 38s". Kaizen does not rely on unmeasurable improvement.
- Reversible trial: Small change means small risk. If it doesn't work, the loss is small; If it works, it will be standard.
A good map to find where to start, 7 wastes (muda) in our article Types of losses; Most improvement opportunities fall under these seven headings.
What are its limits??
Kaizen does not solve every problem. In cases requiring a leap in technology (physical limit of capacity, need for a new production method), incremental improvement is insufficient; In this case, the investment decision should not be postponed. The second trap is the “kaizen theatre”: suggestion meetings without measurement and standardization give a feeling of improvement but do not produce results. The loop is broken when the "Check" step is skipped.
Where to Start?
Every workshop that engages in repetitive production is open to Kaizen. "How can we increase efficiency without a large investment?" If the question is asked, the answer often lies not in one big move, but in a systematic collection of small, measurable steps. The equivalent of the same gradual logic on the maintenance side In our predictive maintenance article you can find: most critical machine first, then deployment.
Do you want to increase your production efficiency without making large investments? At Takt, we examine your processes with Kaizen and lean production principles; We reduce cycle time, movement and waiting losses in measurable steps. Contact / Request process improvement.