Shop methodology

5S for the shop floor

5S gets dismissed as a tidy-up campaign, which is a shame, because a genuinely well-run glass shop is safer, faster, and catches defects earlier than a cluttered one. The five steps are simple. Making the fifth one stick is the whole game.

8 min read Foundational 5S

More than tidying up

The pitch for 5S sounds weak: keep the place tidy. Any shop owner can be forgiven for thinking they have bigger problems than housekeeping. But in a glass plant the clutter is not cosmetic, it is expensive and occasionally dangerous. A crowded rack is where lites get chipped. A missing suction cup is thirty seconds of walking, forty times a shift. A dirty cutting table transfers grit onto glass that shows up as a scratch two stations later. A blocked aisle is where someone carrying a large lite trips.

5S is five plain steps, and they happen to start with S in both Japanese and English. The point is not neatness for its own sake. It is that a place with a spot for everything makes problems visible: you can see at a glance that a tool is missing, a rack is overloaded, or a machine is leaking, before it becomes a defect or an injury.

The five steps, by station

The steps run in order, and each one sets up the next. Here is each with what it actually looks like at three stations, because "sort your workspace" means something different at a cutting table than at a tempering oven.

  1. Sort (Seiri): keep only what the job needs. Everything else leaves the station. At the cutting table, that means the offcuts that "might be useful" and the three broken cutters in the drawer. At the oven, the setup tools for a machine you retired. On the IGU line, the half-used desiccant sacks and the spacer profiles you no longer run. If you cannot say when you last used it, it is a candidate to go.
  2. Set in order (Seiton): a place for what remains. Every tool has one home, within reach, and you can see instantly if it is gone. Shadow boards for cutting tools. A marked spot for each suction cup and setting block. Marked floor zones for incoming and outgoing racks so glass is never just "somewhere on the floor." The test: a new person should be able to find the tape measure without asking.
  3. Shine (Seiso): clean, and inspect while you clean. In glass, shine is not optional, it is quality control. Grit on a cutting table becomes a scratch. Dust on the IGU line becomes a sealed-in defect you can never remove. And cleaning a machine is when you notice the oil leak, the worn roller, the cracked suction seal, before it fails mid-run.
  4. Standardize (Seiketsu): make it the normal way, not a heroic effort. Write down what "set up right" looks like for each station, with a photo of the tidy state. Assign who does what and when. The goal is that the first three S's happen by default every shift, not in a panic before an audit.
  5. Sustain (Shitsuke): keep doing it when nobody is watching. This is the discipline to hold the standard after the novelty wears off. It lives or dies on leadership actually caring, a short regular check, and fixing the standard when it turns out to be unrealistic rather than just ignoring it.
Safety is not a separate program here
In a glass shop the housekeeping S's and safety are the same work. Clear aisles, glass stored at safe angles, offcuts binned not leaned against a wall, cutting fluid cleaned up before someone slips. A tidy glass shop is a safer glass shop, and that alone usually pays for the effort.

The red-tag trick

Sort stalls the moment two people disagree about whether something is still needed, and in a busy shop that is constant. The red-tag technique settles it without an argument.

When you are sorting, anything nobody can justify keeping gets a red tag with the date and moves to a marked red-tag area, usually a taped-off corner, rather than straight to the skip. It stays there for an agreed window, say a month. If someone needs it in that time, they take it back, no drama. If it sits untouched for the whole window, it goes for real. This breaks the deadlock: you are not asking anyone to throw away something they are attached to, you are just testing whether it is actually used. Most of it never gets reclaimed, and everyone can see that for themselves.

Why the fifth S fails

Almost every shop can do the first four S's. Give it a weekend and some enthusiasm and the place looks transformed. Come back in three months and it has usually slid straight back. The failure is nearly always at Sustain, and it fails for predictable reasons:

  • It was a one-off event, not a routine. A blitz with no short daily rhythm behind it always decays. Five minutes at end of shift beats a heroic quarterly cleanup.
  • Leadership stopped caring visibly. If the person in charge walks past the mess, so does everyone else. Sustain is enforced by attention, not posters.
  • The standard was unrealistic. If "tidy" as written cannot survive a busy run, people quietly abandon it. When that happens, fix the standard to match reality, do not just declare that people failed it.

A light, regular audit is the usual answer: a short scored walk-through on a schedule, the same questions each time, so the trend is visible and slippage gets caught early rather than discovered six months later.

Lean Dashboard, 5S auditScore each S at each station on a repeatable checklist and watch the trend, so Sustain has teeth.
Note: A plain-English working guide, written for glass shops. It summarizes widely used quality and lean methods and, where standards are mentioned, points you to the source. It is not a substitute for the standards themselves or for advice specific to your operation.