SEF Reference Guide G03 | Manufacturing OpEx Maturity Assessment
How to use this guide. This is SEF's standard method and the numbers we start from. Every operation is different, so treat the targets, timings, weightings, and templates here as a starting point and adjust them to your products, customers, and risk. Write your version down before you measure against it. Do not apply a tool just to apply a tool. Every method here carries a cost in time, attention, and discipline, and the benefit has to justify that cost in your operation. If it does not, leave it out and say why. A lower score on a criterion you have deliberately chosen not to pursue is an honest score, not a failure. One thing should not change: the maturity level definitions, because they are the scoring basis for the assessment.
What it is
A Visual Management System (VMS) puts the right information in plain view, at the place where the work happens, so anyone can see what normal looks like, whether the area is on plan, and what to do next. It covers floor markings, signs, labels, status lights, and above all the information boards where a team tracks its own performance.
The Lean Enterprise Institute defines visual management as placing tools, parts, production activities, and performance indicators in plain view so the status of the system can be understood at a glance. Gwendolyn Galsworth’s work on the visual workplace pushed the idea further: a well-designed area answers its own questions, so people do not have to go looking for information or ask someone.
A useful way to think about it is four jobs a visual can do: share information (a production board), show the standard (a photo standard or a marked location), signal an abnormality (an andon light, a red cell on a board), and stop an error (a physical guide that only fits one way, see G08). The higher up that list you go, the less the system depends on someone noticing.
Why it matters
- Faster response: a missed hour on an hour-by-hour chart gets attention in that hour, not at the end of the month.
- Delivery: teams that see plan versus actual through the shift can recover before the shipment is late.
- Safety: marked walkways, vehicle routes, and emergency equipment reduce collisions and blocked exits.
- Quality: clearly marked locations for good, suspect, and rejected material stop mix-ups.
- People: when operators keep their own boards, they own the numbers and the problems behind them.
Key terms
| Term | Meaning |
|---|---|
| VMS | Visual Management System. Making the right information visible at the right place, so anyone can see normal versus abnormal, current performance, and what to do next. |
| Visual display | A visual that shares information (a chart, a sign, a status board). People have to read it and choose to act. |
| Visual control | A visual that builds the standard into the workplace so a deviation is obvious (a marked location, a min/max line, a gauge with a green zone). |
| Andon | A signal, often a light or a board, that shows the status of a line and calls for help when there is a problem. |
| Information board | A standard board at the workplace showing the team’s key measures, plan versus actual, issues, and actions. Also called a team board or production board. |
| Hour-by-hour chart | A board or sheet where the team records planned and actual output each hour, with the reason for any gap. |
| SQDCP | Safety, Quality, Delivery, Cost, People. A common set of headings for information boards. |
| Floor marking | Painted lines or tape that define walkways, vehicle routes, work areas, and storage locations. |
| Legally required signage | Signs a regulator requires (for example, exits, fire equipment, chemical hazards, and PPE zones). The Level 1 baseline. |
| Update frequency | How often each measure on a board is refreshed. The assessment scores this directly (weekly, every shift). |
How to do it
- Mark the floor. Mark walkways, vehicle routes, work areas, WIP locations, and emergency equipment. In the US, OSHA requires permanent aisles and passageways to be appropriately marked (29 CFR 1910.176) and uses yellow for caution and physical hazards (29 CFR 1910.144). Beyond that, choose a color convention, write it down, and apply it plant-wide.
- Design one standard board. Use the same layout in every area so anyone can read any board. A proven layout: SQDCP measures across the top, plan versus actual for today, an issues and actions list, and a section for improvement projects.
- Define each measure. For every item on the board, write down the formula, the data source, the target, the owner, and how often it is updated. If nobody would act on a measure, leave it off.
- Set the update rhythm. Start with weekly updates (Level 3). Move the measures that change fast, such as output, scrap, and downtime, to every shift (Level 4). Hour-by-hour charts go further still.
- Hand the pen to operators. Operators write the numbers and the reasons for misses themselves (Level 5). Hand-written, current data beats a neat printout from last week.
- Make red mean action. Any measure off target gets an entry in the action list with an owner and a date. Use shapes or text as well as color so people with color vision differences can read the board.
- Use the board every day. The board is the agenda for the daily meeting (see G04). A board that is not used in a meeting will not stay current.
- Audit the boards. Add a board check to leader gemba walks: is it current, is it complete, are actions moving?
What each maturity level looks like
OB-3 Visual Management System (VMS)
| Level | Assessment wording | What it looks like on the floor | How to move up |
|---|---|---|---|
| 1 | Only legally required signage is posted. | Exit and hazard signs only. No floor markings beyond what is required. Performance data lives in offices and systems. | Mark walkways, vehicle routes, and work areas using one plant color convention. |
| 2 | Work areas, walkways, and roads are clearly marked. | Clear floor markings inside and roads marked outside. People and vehicles are separated. No performance boards yet. | Design a standard information board and put one in each area, updated at least weekly. |
| 3 | As Level 2, plus standard information boards are in place and updated at least weekly. | Every area has the same board layout. Data is at most a week old. Supervisors or office staff update it. | Move fast-changing measures to per-shift updates and use the board in the shift-start meeting. |
| 4 | As Level 3, plus information boards at the workplace are updated every shift. | Boards show today’s and yesterday’s results. Misses have reasons and actions. Boards drive the daily meeting. | Train operators to update their own boards and record reasons for misses. |
| 5 | As Level 4, plus operators update the information boards themselves. | Operators write output, quality, and issues on the board during the shift. Leaders read and respond, they do not fill it in. | Add hour-by-hour tracking and andon-style signals so abnormalities are seen in minutes. |
Evidence to look for
Document
- Plant visual standard: board layout, color convention, floor marking rules.
- Measure definitions for each board item (formula, owner, target, frequency).
- Board audit records from leader walks.
Observation
- Stand at a board for 30 seconds. Can you tell whether the area is winning or losing today?
- Check the date on the most recent entry. Is it this shift?
- Whose handwriting is on the board? Operators, or the supervisor?
- Are walkways and roads marked and kept clear? Are vehicles and people separated?
Statement
(questions to ask and who to ask)
- Operator: “What does this board tell you? Who updates it? What happens when a number is red?”
- Team leader: “Which measure on this board has driven an action this week?”
- Manager: “How do you know from the floor, without a report, how each area is doing?”
Management report
- Board audit results by area (current, complete, actions moving).
- Percent of areas with a standard board and the update frequency achieved.
- Action list closure rate and age of open actions.
Common pitfalls
- Wallpaper. Boards full of printouts that nobody reads or updates. If it is not used in a meeting, it will not stay current.
- Too many measures. Five to eight measures a team can influence beat twenty the team cannot.
- Boards in the office. The board belongs where the work happens, at the point of use.
- Red with no response. If misses never lead to actions, people stop recording them honestly.
- Every area invents its own format. Standard layouts let leaders and visitors read any board quickly.
- Color only. Status shown only by red and green is hard to read for some people. Add text, symbols, or shapes.
Template
Standard Information Board Layout
| Section | Content | Update frequency | Updated by |
|---|---|---|---|
| Safety | Days since last injury, near misses this week, open safety actions | Every shift | Operator |
| Quality | Scrap and rework count, first-pass yield, customer complaints | Every shift | Operator |
| Delivery | Plan versus actual (hour-by-hour or shift), on-time orders | Every hour or shift | Operator |
| Cost | Overtime hours, scrap cost, downtime minutes | Every shift | Team leader |
| People | Attendance, skills matrix (see G16), recognition | Weekly | Team leader |
| Issues and actions | Issue, owner, due date, status | Every shift | Team, in the daily meeting |
| Improvement | Current improvement projects and status (see G05) | Weekly | Project owners |
Measure Definition Sheet
| Measure | Formula | Data source | Target | Owner | Update frequency | Reaction when off target |
|---|---|---|---|---|---|---|
First 30 days
- Week 1: Walk the plant and photograph floor markings and existing boards. Write the color convention and a draft board layout.
- Week 2: Fix the floor markings in one pilot area. Build and install the pilot board. Define each measure.
- Week 3: Update the board every shift. Use it in the shift-start meeting. Coach operators to write their own entries.
- Week 4: Audit the pilot board on a leader walk. Adjust the layout. Plan roll-out to the next areas.
Further reading
- Gwendolyn Galsworth, Visual Workplace/Visual Thinking: Creating Enterprise Excellence Through the Technologies of the Visual Workplace, Visual-Lean Enterprise Press, 2005.
- Gwendolyn Galsworth, Visual Systems: Harnessing the Power of the Visual Workplace, AMACOM, 1997.
- Lean Enterprise Institute, Lean Lexicon entry “Visual Management”: https://www.lean.org/lexicon-terms/visual-management/
- David Mann, Creating a Lean Culture: Tools to Sustain Lean Conversions, 3rd edition, Productivity Press, 2015.
- OSHA 29 CFR 1910.176, Handling materials (marking of aisles and passageways): https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.176
Want this for your business?
This is a live example of what Systems Equal Freedom builds for owner-run businesses: operations that are documented, visible, and able to run without the owner in every loop.
