Kaizen is the Japanese practice of continuous, incremental improvement, carried out by everyone in an organization every day, rather than left to a specialist team or an occasional big overhaul.
The idea
Pure improvement, driven by everyone, everywhere, every day:
- Know your customer — identify their interests so you can enhance their experience and create real customer value
- Let it flow — target zero waste; everyone in the organization works to create value and eliminate waste
- Go to Gemba — value is created where the work actually happens, so go there and follow the action rather than manage from a distance
- Be transparent — speak with real data; performance and improvements should be tangible and visible to everyone
- Empower people — set shared goals for teams and give them the system and tools to reach them
The philosophy is closely tied to the Toyota Production System and was popularized as a management approach in Masaaki Imai’s book Kaizen: The Key to Japan’s Competitive Success.
When to use it
- Refining a manufacturing or operational process step by step
- Running team retrospectives that end in small, concrete changes
- Building a personal practice of steady skill or habit improvement
How to apply it
- Go to Gemba: observe the place where the work actually happens
- Find a specific piece of waste or friction, backed by real data, not opinion
- Make one small change and test it
- Standardize what works, then repeat the loop
Watch out for
- Treating Kaizen as a one-off improvement event rather than a sustained daily habit
- Skipping Gemba and trying to improve a process from data and meetings alone
- Relying only on small improvements when the underlying system itself needs a larger rethink
Related models
- DFLSS — a related Lean/Six Sigma improvement approach.
- Lean Startup — shares Kaizen’s roots in Lean thinking and iterative improvement.
- Deliberate Practice — the individual-skill analogue of continuous improvement.
Sources
Masaaki Imai, “Kaizen: The Key to Japan’s Competitive Success” (1986); Kaizen.