5S is usually the first lean method a plant tries, because it needs no software and no budget — just time and agreement. It is also one of the easiest to let slide.
The five steps
Sort
- Japanese
- Seiri
- What it means
- Remove everything not needed for the work
Set in order
- Japanese
- Seiton
- What it means
- A fixed, marked place for everything that stays
Shine
- Japanese
- Seiso
- What it means
- Clean the area — and inspect while cleaning
Standardize
- Japanese
- Seiketsu
- What it means
- Write the first three down as a routine
Sustain
- Japanese
- Shitsuke
- What it means
- Keep doing it, with checks, until it is habit
| Step | Japanese | What it means |
|---|---|---|
| Sort | Seiri | Remove everything not needed for the work |
| Set in order | Seiton | A fixed, marked place for everything that stays |
| Shine | Seiso | Clean the area — and inspect while cleaning |
| Standardize | Seiketsu | Write the first three down as a routine |
| Sustain | Shitsuke | Keep doing it, with checks, until it is habit |
5S around a CNC machine
- Sort: old fixtures, broken inserts and tools from finished jobs leave the machine’s cart.
- Set in order: holders, wrenches, gauges and offset sheets get a shadow board or marked spot at the machine.
- Shine: chips and coolant are cleared on a schedule — and leaks, loose guards or worn wipers get noticed while doing it.
- Standardize: a one-page checklist per machine, the same on every shift.
- Sustain: a short audit, at a fixed time, by someone who owns it.
The payoff on a CNC floor shows up in setup: less searching for a tool or gauge means shorter changeovers (see SMED).
Why the fifth S is the hard one
Sort, Set in order and Shine are a project — a weekend’s work. Standardize and Sustain are a habit, and habits fade without feedback. The usual way to keep 5S alive is to tie it to a number people already care about: if setups get shorter and machines wait less, the routine has a visible reason to continue.
That is where machine monitoring helps — it shows setup and idle time per machine before and after a 5S push, instead of relying on whether the area looks tidy.