What Is 5S?
5S is a workplace organization methodology formed from the initials of five Japanese words. One of the fundamental tools of the Toyota Production System, 5S aims to create a clean, organized, safe, and standardized production environment.Each step builds on the previous one, and by the fifth step the system becomes self-sustaining.
A Detailed Look at the Five Steps
1. Seiri — Sort
All materials, tools, equipment, and documents in the work area are reviewed. What is needed is clearly separated from what is not.The red tag application is the core tool of this step: red tags are attached to all items whose frequency of use and value are unclear; they are quarantined for a set period and a needed/not-needed decision is made. In sheet metal workshops, old dies, unused tooling, and defective jig stock become visible through this step.
2. Seiton — Set in Order
Necessary items are placed according to the principle of "a place for everything, and everything in its place." The goal is to bring search time as close to zero as possible.Application tools:
- Shadow boards: the exact silhouette of the tool is drawn on the board; a missing tool is immediately visible
- Color coding: color differentiation by machine, product, or process
- Floor marking: floor tapes and signs define material, equipment, and walkway zones
- Visual labeling: content labels on shelves, cabinets, and drawers
3. Seiso — Shine
The work area and equipment are cleaned to create an environment where abnormalities become visible. In this step, cleaning is defined not as a routine but as an inspection: while cleaning the machine, leaks, cracks, or wear are also noticed.In sheet metal presses, oil accumulation and chip/scale build-up can mask die damage. Regular cleaning identifies these risks early.
4. Seiketsu — Standardize
Standards are established to make the first three steps permanent. Visual instructions, cleaning and inspection checklists, and responsibility assignments are implemented at this stage.Without standards, a 5S implementation remains nothing more than a few weeks of cleaning activity and cannot transform into a lasting culture.
5. Shitsuke — Sustain
This is the stage where adherence to standards becomes a habit. Audit sheets, regular 5S walkthrough tours, and visible management participation on the shop floor keep this step alive. The goal is to internalize 5S not as an extra task but as a natural part of the work.The Tangible Impact of 5S in Sheet Metal Workshops
| Application Area | Before 5S | After 5S |
|---|---|---|
| Tool management | Minutes spent searching for tools | Located in seconds via shadow board |
| Die storage | Unlabeled, mixed stacks | Coded rack system, fast access |
| Machine surroundings | Chip and scale accumulation, oil stains | Clean surface ready for inspection |
| Work-in-process | Unknown quantities scattered around | Defined location, visible quantity |
| Safety corridors | Blocked by material, unclear boundaries | Open, safe pathways marked with floor tape |
5S Integration with Other Lean Tools
5S is not a standalone tool; it prepares the foundation for other lean methodologies:- Kaizen: An organized environment makes improvement opportunities more visible
- Poka-Yoke: Standardized placement increases the effectiveness of error-proofing mechanisms
- TPM (Total Productive Maintenance): Clean machines facilitate early fault detection
- SMED: Organized tooling and die management shortens setup times
Conclusion
On the surface, 5S looks like an ordinary cleaning and tidying exercise. But at its core, it is a discipline that lays the foundation of manufacturing culture. A standardized, clean, and well-organized workshop directly reduces quality defects, safety risks, and efficiency losses.At Avcı Kalıp, we embrace 5S practices as an inseparable part of our production culture, aiming to create an environment where every operator takes ownership of their own work area.
This article has been prepared for professionals working in lean manufacturing, quality management, and production engineering.