Most factors that negatively affect production efficiency are not major malfunctions or costly wrong decisions. The tool in the wrong position, the apparatus that cannot be searched for and found, the excessively accumulated intermediate stock, the contaminated worktop surface — the sum of these means a tremendous amount of time and energy that Decays unnoticed. the 5S methodology is designed to systematically eliminate these silent losses.
What is 5S?
5S is a work environment organization methodology consisting of the initials of five Japanese words. 5S, one of the core tools of the Toyota Production System, aims to create a clean, organized, safe, and standardized production environment.
Each step builds upon the previous one, and with the fifth step, the system becomes self-sustaining.
Detailed Examination of the Five Steps
1. Seiri — Classification (Sort)
All materials, tools, equipment and documents in the work area are reviewed. It is separated by a definite line between what is necessary and what is unnecessary.
Red label application is the basic tool of this step: a red label is attached to all items whose frequency of use and value are uncertain, quarantined for a certain period of time, and a necessary-unnecessary decision is made. With this step, the stock of old molds, unused tools, and defective fixtures accumulated in sheet metal workshops becomes visible.
2. Seiton - Editing (Set in Order)
The necessary items are placed on the principle of "everything has a place, everything is in place". The aim is to Decelerate the search time to near zero.
Application tools:
- Shadow boards: the team’s full silhouette is drawn on the board; missing players are immediately visible
- Color coding: color differentiation based on workbench, product or process
- Site marking: materials, equipment, and walkways are identified with ground tapes and markings
- Visual labeling: content labels for shelves, cabinets, and drawers
3. Seiso - Cleaning (Shine)
The work area and equipment are cleaned to create an environment where defects are visible. At this step, cleaning is not a routine task but an
inspection: while cleaning the countertop, leaks, cracks, or wear can also be detected.
Oil buildup, chip and flake accumulation in sheet metal presses can mask mold damage. Regular cleaning detects these risks early.
4. Seiketsu - Standardization (Standardized)
Standards are established to make the first three steps permanent. Visual instructions, cleaning and inspection schedules, and responsibility assignments are implemented at this stage.
Without a standard, implementing 5S remains just a cleaning activity that lasts a few weeks and cannot become a lasting culture.
5. Shitsuke — Discipline (Sustain)
It is the habituation of complying with standards. Control charts, regular 5S tours, and management’s visible on-site involvement keep this step alive. The goal is to adopt 5S not as an extra task but as an inherent part of the job.
Concrete Effects of 5S in Sheet Metal Workshops
| Application Area |
Pre-5S Status |
Post-5S Status |
| Team management |
Team search time in minutes |
Find it in seconds with the shadow board |
| Mold storage |
Unlabeled, mixed batch |
Coded shelf system, quick access |
| Countertop perimeter |
Sawdust and flake buildup, oil stains |
Clean, inspection-ready surface |
| Intermediate stock |
Distributed in an indefinite quantity throughout the environment |
Visible quantity at the defined point |
| Security corridors |
Blocked by material, undefined boundaries |
Clear, safe paths with a ground tape |
Integration with 5S and Other Lean Tools
5S is not a standalone tool; it lays the foundation for other lean methodologies.
- Kaizen: An organized environment makes improvement opportunities more visible
- Poka-Yoke: Standardized layout increases the effectiveness of error prevention mechanisms
- TPM (Total Productive Maintenance): Clean workbenches facilitate early fault detection
- SMED: Regular tool and mold management reduces setup times
Result
The 5S looks like an ordinary cleaning and order application. But at its core, it is an understanding of discipline that lays the foundation for production culture. A standardized, clean, and well-organized workshop directly reduces quality defects, safety risks, and productivity losses.
As Avci Kalip, we adopt 5S applications as an integral part of our production culture; we aim to create an environment where each operator owns his own workspace.
This article has been prepared for professionals working in the fields of lean manufacturing, quality management and production engineering.
