Building a skills matrix for a manufacturing team.

Every shop has one. The person who is the only one who can run the brake, set up the old lathe, or close out the inspection paperwork. When that person is out, the cell slows down or stops. A skills matrix is the simplest tool I know for finding those people before a sick day finds them for you. It is a grid: tasks across the top, people down the side, and a mark in each cell showing how far along each person is on each task. Lean Enterprise Institute faculty member Greg Lane describes the same tool as a training matrix, and says the question it answers is "Where am I now?" versus "Where do I want to be?"^[1]

Below: how to build one, how to read it to find single points of failure, how to turn red columns into a training plan and a career path, and a 30-minute method to fill it in on Monday.

Why this matters more than it did ten years ago

The skills on your floor are walking out the door at a steady rate, and you are hiring replacements at close to the same rate. In June 2025, the Bureau of Labor Statistics counted 415,000 open jobs in U.S. manufacturing, 290,000 hires, and 305,000 total separations, including 172,000 quits, in that single month.^[2] Each quit can take a skill with it that nobody else has.

The long view is not better. A 2024 study by the Manufacturing Institute and Deloitte, based in part on a survey of more than 200 U.S. manufacturers, projected that manufacturing could need as many as 3.8 million workers between 2024 and 2033, and that 1.9 million of those jobs could go unfilled without investment in upskilling current workers and training new ones.^[3] (The report itself sits behind a member login, so I am citing ASME's write-up of it.) Narrowing the workforce gap is one of the primary goals in the MEP National Network's 2023 to 2027 strategic plan, and MEP centers in every state offer workforce programs toward it.^[4]

What that looks like on a small shop floor is tribal knowledge. The Illinois MEP center, IMEC, puts it this way: walk into almost any plant and you will hear "Go shadow Joe for a few weeks."^[5] They list the predictable results when training depends on who is available instead of a defined process: longer onboarding, inconsistent methods between shifts, more rework, more safety risk, and lost knowledge when experienced people retire.^[5]

In my 15 years in stainless steel manufacturing, the gap was never on an org chart. It showed up on the floor as a late order. The matrix makes that gap visible before the order is late.

Pick a scale before you draw a grid

The matrix is only as good as the definitions behind the marks. Jon Miller of Gemba Academy says the first step is to establish standards: how many levels you will have, what each level means, what the criteria are, and who is qualified to teach.^[6] He has seen matrices with as few as two levels and as many as seven, and recommends keeping it simple and using one standard across the whole organization.^[6]

The scale I use is four levels. You will see versions of it in TWI and lean shops, with small wording differences.

Two rules keep the scale honest.

First, a level is about what a person can do at the machine, not what course they sat through. Level 3 means a supervisor watched them run the job alone and checked the parts. Nothing else counts.

Second, you need a standard to measure against. Toyota lists the development of multi-skilled workers among the ways it has developed its people, and says those efforts are what support its mixed-flow production lines.^[7] Multi-skilled only means something if each skill has a defined standard. The Lean Enterprise Institute lists easier training of new operators among the benefits of standardized work, and names the job instruction sheet, also called a job breakdown sheet, as the document used to train them: it lists the steps of the job and any special knack needed to do it safely and well.^[8] If a job has no breakdown sheet yet, you can still rate people on it, but write "no standard" at the top of that column. It is your first training task.

Where the matrix came from

The skills matrix is not new. It is the first step of Training Within Industry's Job Instruction program, written for U.S. war production in 1944. The Job Instruction card tells the supervisor, before teaching anyone, to "Have a Time Table": decide how much skill you expect each person to have, by what date.^[9] Christoph Roser, who has written a long series on the original TWI materials, describes the 1945 example from that manual as a simple skills matrix showing which worker can do what, with two workers scheduled to learn drilling and taper turning by a set date.^[9]

David Boulay, president of IMEC, puts the timetable first among the four steps to get ready to train: a plan for who is going to be trained, on what task, and by when.^[10] The TWI Institute still sells the Job Instruction training timetable as a paper pad today.^[11] The Texas MEP center lists "develop skills to create a training matrix" as one of three objectives of its Job Instruction course, alongside the job breakdown and the four-step method.^[12]

So the matrix and Job Instruction are one system. The matrix tells you who needs to learn what. The job breakdown tells you what to teach. The four steps (prepare the worker, present the job, try out the job, follow up) are how you teach it.^[13] I covered the four steps in detail in TWI Job Instruction: the four-step method for training that sticks. This post is about the grid that feeds it.

Reading the matrix: find the single points of failure

Most people fill in a skills matrix, hang it on the wall, and look at the rows. Rows tell you about people. Columns tell you about risk. Read the columns.

Lane describes looking down one column of his training matrix and seeing very little filled in, which tells him he has only one person who can do that task.^[1] NIST MEP makes the same point from the other side: if an employee is out sick or on vacation, cross-training means you have a back-up who can complete the critical tasks.^[14]

Here is the test I use. For every column, count the people at level 3 or 4. Then apply three rules.

Add a "depth" row at the bottom with that count for each column. It is the most useful number on the page.

Then look for two more patterns:

• The hero row. One person with 4s across most of the grid. That person is your biggest risk, not your biggest asset, until some of those 4s have produced 3s in other rows. The Purdue MEP center worked with a precision machine shop whose primary dimension inspection person needed training to prepare him to cross-train other employees; after the program, eight employees had received technical skills training and inspection time dropped 25 percent.^[15] That is the hero row being turned into depth.
• The empty column with a customer behind it. A job that ships twice a year and one semi-retired operator still runs. It becomes a three-week delay when the order lands and that operator is in Florida.

From red columns to a training plan

A red column is a training assignment. Here is how to turn it into one without a committee.

1. Pick the three worst red columns. Rank by what happens to shipments if the job stops. Do not try to fix every column at once.
2. For each one, name a trainer and a learner. The trainer is a level 4 in that column, or the lone level 3 if there is no 4. The learner is someone at level 1 or 2 who is on the same shift and has shown interest.
3. Set a date for the learner to reach level 3. Write it in the cell. That is the training timetable, exactly as TWI defined it in 1944: who, what, by when.^[9]
4. Check that a job breakdown exists. If it does not, the trainer writes one first. Important steps, key points, reasons why.^[13]
5. Train with the four steps, not by shadowing. The TWI Institute lists eliminating job shadowing and "buddies" training, by creating shop floor skills trainers, as an objective of its Job Instruction course.^[16]
6. Verify at the machine and update the cell. The supervisor watches the learner run the job alone, checks the output, and changes the mark. Not before.

Your state's MEP center can help with the method. When NIST MEP surveyed its centers on workforce services, incumbent worker training, including lean, ISO, quality, and Training Within Industry, was where centers were most focused.^[17]

Career paths from the same grid

Once columns are handled, go back to the rows. A row is a person's development record, and it can be their career path with almost no extra paperwork.

IMEC's advice for a training system is to answer a few questions for each role: what success looks like, what skills are required, how people learn them, how competency is verified, and how development continues.^[5] A skills matrix with defined levels answers all five on one sheet.

In practice, that means:

• New hire path. Three columns to level 3 in the first 90 days, chosen from the red and yellow ones. The hire knows what they are working toward from day one.
• Operator to lead. A lead needs level 4 in the cell's core jobs. That is a visible, fair bar. Nobody has to guess why one person got the lead role.
• Pay tied to levels, if you want it. Some shops pay a step per column at level 3 and another per level 4. I will not tell you how to pay people, but when levels are verified and on the wall, raise conversations get shorter.

Lane notes that the benefit runs both ways: the leader sees which skill sets need coverage, and each person can look at their own row and see what they have, what they lack, and what they are scheduled to learn.^[1]

Keeping it honest

A skills matrix goes stale fast. Three habits keep it true.

• Update on events, not on a calendar. When someone reaches a level, changes shifts, or leaves, change the grid that day.
• Review the depth row monthly. Five minutes in the production meeting. Which columns went red? Which training dates slipped?
• Never let HR own it alone. The marks have to come from the person who watched the job get done. Keep the master copy where the supervisors are.

And keep it visible. A matrix in a spreadsheet on one manager's laptop is a report. A matrix on the wall by the cell is a tool. For 13 years I fixed late orders by walking the floor and asking why, and the pattern was always the same: good people, scattered data, and nobody looking at the same numbers. The skills matrix is one of the cheapest ways to get everyone looking at the same picture of who can do what.

Where software fits

A spreadsheet is the right tool for your first matrix and probably your first year. Do not buy anything to find out whether you have a problem. The grid above will tell you.

Software earns its place when training dates have to show on the schedule, a level 3 sign-off needs a record of who verified it and when, and breakdown sheets, timetables, and the matrix need to stay in sync across shifts. That is what HixonOps' competency and talent system does, with TWI Job Instruction built in, so the breakdown, the timetable, and the verified level are one record instead of three files. It runs in your own cloud, on a flat license.

Either way, the work is the same. Define the levels. Rate honestly. Read the columns. Train the red ones first. The tool just has to keep up.