Most major transformations have no grand starting point. Shaving two seconds off a welding cycle, eliminating a die changeover step, optimizing a sheet handling movement — each one seems small. But accumulated systematically, they become the difference that defines competitiveness. That approach is called Kaizen.

What Is Kaizen?

Kaizen (改善) is formed from the Japanese words "kai" (change) and "zen" (good), meaning "continuous improvement." One of the fundamental pillars of the Toyota Production System (TPS), Kaizen is not a one-time project but an indispensable part of manufacturing culture.
The essence of Kaizen is this: every process can be improved; the person who knows that process best is the one best positioned to improve it. For this reason, Kaizen stands out as a methodology fed not from top management but from shop floor workers — one that creates tangible gains through short-term focus by small groups.

The Anatomy of a Kaizen Event

A typical Kaizen event in sheet metal and tooling facilities follows these steps:
  • Problem identification: An improvement opportunity is identified based on observations, data, and complaints.
  • Current state analysis: Waste points are visualized through value stream mapping, spaghetti diagrams, or video analysis.
  • Goal setting: A measurable and achievable target is set (e.g., reduce setup time by 30%, halve the scrap rate).
  • Root cause analysis: The real cause is found using 5 Whys or a fishbone (Ishikawa) diagram.
  • Improvement design and implementation: Low-cost, quickly implementable solutions are tested.
  • Standardization: Working improvements are converted into procedures, work instructions, or visual guides.
  • Sharing results: Gains are shared with the entire facility; horizontal deployment to similar processes is ensured.

Kaizen Application Areas in Sheet Metal Facilities

Area Kaizen Opportunity
Die changeover (setup) Separating internal and external setup with SMED methodology; reducing changeover time
Sheet feeding line Elimination of unnecessary transport movements and waiting times
Scrap and rework Identifying error root causes, die correction, or parameter optimization
CNC machine efficiency Reducing idle running time, extending tool life
Maintenance processes Shortening breakdown times, improving preventive maintenance routines
Ergonomics and safety Workload distribution, lifting points, cutting surface exposure

SMED: Kaizen Applied to Setup Times

SMED (Single Minute Exchange of Die) is the methodology developed by Shigeo Shingo that dramatically reduces die changeover times.
The core approach divides setup activities into two groups:
  • Internal setup: Operations that must be performed while the machine is stopped
  • External setup: Operations that can be prepared while the machine is running
The goal of SMED is to convert as many internal setup steps as possible to external, and to shorten the remaining internal steps through standardization. Die changeovers on sheet metal presses that used to take hours can be reduced to fifteen to twenty minutes with this method.

Kaizen Culture: Beyond Technical Tools

For Kaizen to deliver lasting results, a cultural foundation beyond technical tools is required:
  • Psychological safety: An environment where workers are not afraid to report errors
  • Management commitment: Senior management going to the shop floor (Gemba walk) and taking suggestions seriously
  • Visible tracking: Monitoring improvement proposals, their status, and results on a board
  • Training: Systematic training so that workers can use problem-solving tools

Kaizen and Digital Transformation

Digital tools offer new opportunities that strengthen the Kaizen process:
  • Shop floor observation is facilitated through video analysis
  • OEE (Overall Equipment Effectiveness) software automatically reports waste
  • Digital Kaizen boards enable remote tracking and coordination
  • Data analytics prioritizes processes with the highest improvement potential

Conclusion

Kaizen is not a project — it is a posture. Staying competitive in the sheet metal and tooling industry requires not only large capital investments but also the discipline of continuous improvement, advancing one small step every day.
At Avcı Kalıp, we place a culture of continuous improvement at the center of our manufacturing philosophy, targeting a little better every day to deliver faster lead times, lower scrap rates, and higher quality to our customers.
This article has been prepared for professionals working in manufacturing engineering, lean production, and process improvement.