Lean Foundations — Lesson 5: Standardized work: the best known method for everyone

Lean Foundations · 5 min read · 16.10.2026

The fifth lesson of the Lean Basics series follows up on last time's changeover. Today's topic is the one without which the gains from changeover — or from 5S or VSM — cannot be sustained: standardized work. We will cover what it consists of, how to build it right at the workplace, and how to keep it alive even six months later.

Without a standard you don't have a process, only habits

In entry audits, we keep seeing the same picture: one operation, three shifts, three different methods. In one assembly hall, we measured the same assembly across all three shifts. The first needed 6 minutes per piece, the second 9, the third 11. The equipment, the drawing, and the part were identical. The difference was not in the people — every shift had someone excellent working on it. Only one thing was missing: no one had captured the best way to do it.

Standardized work is the best currently known, safest, and most efficient method, agreed upon by the people who perform the work. Not an optimum from a manual. The best that actually works on your shop floor today.

The standard also has a second role — it is the yardstick for improvement. When we look for the waste from the first lesson, we need to know what is "normal." Without a standard, we cannot tell whether last week was good or bad, and every improvement remains one opinion against another.

A standard is not the end of improvement. It is today's best and an invitation to beat it tomorrow.

What the standard consists of

Standardized work has three components:

• Takt. The rhythm set by the customer. Example: 440 minutes of net time per shift and 88 pieces give a takt of 5 minutes per piece. The work at the station is designed to fit within it.
• Sequence of steps. The exact order: the step, its time, and the key point — the thing that determines quality or safety (checking the gasket, tightening torque, hand position during shutdown).
• Standard WIP. The minimum amount of material at the station that allows work without waiting. Every extra piece is hidden waiting.

The format is secondary. A single A3 sheet has proven itself: the sequence of steps, times, key points, photos of the actual hand and tool positions. Laminated, hung at the station. Not in a folder on a PC where no one will ever open it.

A standard is created on the shop floor, not in an office

A common mistake: a process engineer writes the procedure in the office, sends it to the shop floor, and wonders why nobody reads it. An instruction without the operators' agreement is not a standard. It is a piece of paper that gets bypassed at the first breakdown.

The procedure we use on projects:

1. We pick one operation — ideally the one with the greatest variation in time or the most complaints.
2. We measure each operator's time and record the most capable one on video.
3. We sit down with the team and compare the methods. We usually find that the difference comes down to three or four tricks that only one person knows.
4. We capture the agreed method on a single sheet and agree: this is how everyone will do it — until we change the standard together.

On a valve assembly line, this approach settled the cycle time variation of 6–11 minutes at 8 ± 0.5 minutes, and complaints from the operation dropped by 60%. A new operator cut their onboarding from 6 weeks to 2.5 — they didn't have to gather information from five colleagues; they got it on a single sheet.

Proof from the last lesson: the team cut the changeover from 40 to 12 minutes. Three months later, we measured 25. The new method lived only in two people's heads, and everyone else went back to old habits. A fast changeover without a standard is temporary — a standard locks in the gains.

How to keep the standard alive

A standard dies in two ways: when no one checks it, and when no one updates it.

Checking doesn't have to be bureaucracy. Five minutes of a layered audit is enough: once a week, the supervisor observes the work right at the station and asks three questions. Is the work being done to the standard? If not, why? Is the standard still the best known method? Once a month, the production manager can ask the same questions. A deviation from the standard is not a reason for punishment, but a source of information — either we coach the operator, or we fix the standard.

For updates, one rule applies: every accepted improvement changes the sheet; the new version and date go into the header. When an operator comes up with an idea and the standard changes within a week, the team understands that it is not dead paper, but shared property.

Exercise for this week: pick an operation where at least two operators rotate. Have each one run five pieces and measure the times. Write down each person's method separately — just the steps, no judgment. Then sit down with the operators and look for the step someone handles faster or with fewer corrections, and what they use to do it. A time difference of more than 20% between operators means you have found a candidate for your first standard.

With standards, you get the process under control: the same cycle time and quality across all shifts. Such a process is a prerequisite for the next step of the series — pull systems and kanban only work where the shop floor can deliver a repeatable result. If you want to practice creating standards with a team under a consultant's guidance, check out our e-learning offer.

Quiz — test your knowledge