Teaching the Work — TJI (Toyota Job Instruction)

1What Toyota Leadership Training Methods Says

Chapter 7 covers four lectures on TJI — Toyota's structured method for teaching work to members. The book divides TJI into three phases: preparation before teaching, the method of teaching, and follow-up after teaching.

Lecture 24: Before Teaching, Deepen the Mutual Relationship

The book's first TJI point is not about technique — it is about relationship. When trust exists between teacher and learner, instruction flows smoothly: the learner asks questions freely, admits confusion, and accepts correction. Without trust, the learner pretends to understand, hides mistakes, and the instruction fails silently. The book positions TCS (the communication work from Chapters 3–6) as the prerequisite that makes TJI possible.

Lecture 25: The Work Procedure Sheet (Job Breakdown)

Preparation means breaking the work into steps, identifying key points, and documenting them in a "work procedure sheet." Each entry has three elements: the work step, the key point (what makes it succeed, what makes it safe, what makes it easier), and the reason for the key point. Without the reason, the person being taught cannot grasp what is truly important. The book emphasizes this applies beyond factories — office work, equipment operation, service work all benefit from the same breakdown discipline.

The book also stresses preparation logistics: decide who learns what by when (training schedule), prepare equipment and materials, and show the correct model or standard before teaching begins.

Lecture 26: Teach Reliably by Proceeding in Four Steps

The teaching method proceeds in four steps:

1. Prepare the learner — relax them, assess their current knowledge and skill, explain the importance of the work they will learn.
2. Explain the work — demonstrate while stating the procedure, then demonstrate again while stating key points and reasons. Ask whether anything is unclear (without pressuring language).
3. Let the learner try — have them perform the action, correct mistakes immediately without destroying confidence, then have them do it while stating the procedure, then while stating key points and reasons.
4. Follow up after teaching — go see the work periodically, reduce visits as proficiency grows, designate someone the learner can ask, and tell the member to ask questions actively.

The book notes that most companies only do step 2 (explain) and skip everything else — which is why teaching fails.

Lecture 27: The Six Basics of Teaching Method

The book identifies six teaching methods that should be combined flexibly:

1. Tell and have the person listen
2. Show what has been written
3. Show how to do it (demonstrate)
4. Have the person do it
5. Write and show (explain while drawing/writing)
6. Have the person say it and ask them questions

No single method is sufficient. The leader must combine them based on the learner's experience, skill level, and the nature of the work. The book emphasizes recognizing the "gap" between teacher and learner — in knowledge, language, culture, and assumptions — and adjusting the method mix accordingly.

2Historical Context

The majority of this book — four of eight chapters — focuses on Toyota Communication Skill (TCS). That tells you something important about Toyota's priorities. It is chiefly about how leaders actually behave: their actions, communication patterns, and relationships with people. That is how you experience the world and form your opinions as a team member in reality — not through tools or frameworks, but through how your leader treats you every day.

I expected when I purchased this book to see two chapters each on TCS, TJI, and TPS. Instead it was heavily weighted toward TCS, and I suspect that was done on purpose. Plenty has been written historically on Job Instruction and TPS. How leaders actually behave is not widely covered — and if you search for "Toyota leadership" you get training programs, tools, or thinking patterns, none of which cover the landscape very well.

TJI itself descends directly from TWI Job Instruction, as discussed in Chapter 2. The four-step teaching method, the job breakdown sheet, the emphasis on key points and reasons — all trace back to TWI's JI program from the 1940s, which Toyota adopted in the early 1950s. Toyota adapted and refined it over decades, but the architecture is unmistakable. The book presents TJI as Toyota-originated, continuing the pattern of the TWI lineage being invisible to the current authors.

3Commentary

We have one chapter on TJI and I was honestly a little disappointed. It covers what is already known about the topic and reads as very generic Job Instruction material. It is good to see this line of thinking survive in Toyota, but I have also visited the company and they have surpassed traditional TWI JI training significantly.

In every Toyota manufacturing shop there are fundamental skills dojo environments. New members spend a significant amount of time learning in these skills areas before they ever touch a production line. I have seen several of these skills areas and they are phenomenal at breaking down the basic common elements to a given area.

Traditional TWI teaches a starter job — one specific task, end to end. Toyota teaches all the fundamental skills first across an entire area. For example: twenty basic skills for all assembly jobs, or twenty basic skills for all machining or welding jobs. This horizontal approach to skills is better in my opinion, as it avoids the narrow slice of "I only know one job" and gives a more robust introduction to all fundamental skills in the area. Then you proceed to learning a specific job in the production environment.

The other major achievement is that Toyota teaches these skills with real safety points, real quality points, and real tools — just like you will use on the production floor. You do not practice a simplistic skill that is not relevant. You learn to a safety standard, work standard, quality standard, and time standard with an instructor. It is still teaching safely, correctly, and conscientiously — but you are doing it on real processes similar to what you will encounter in production.

Once certified in the dojo, you are taken to a team leader who has a designated job for you to work on with supervision and coaching. Overall, from what I have observed, this is far superior to traditional TWI JI methods in terms of the learning environment. The book does not cover any of this — and that is the disappointment. Toyota's actual practice has evolved well beyond what is described here.

4Common Mistakes

The common mistakes in training outside of Toyota are the same ones described in the 1940s TWI JI manual. In eighty-plus years, very little has changed in training except how the documents are created.

1. Putting people on the job with little effective training. This was the problem TWI was created to solve. It remains the default in most companies.
2. Not teaching steps, key points, and reasons why clearly enough. The instructor assumes the learner will pick it up, or rushes through the explanation without confirming understanding.
3. Confusing documentation with training. Documents on a screen or a binder on a shelf are not training. A person teaching another person is training.
4. Not employing a mixed strategy. Hearing, seeing, trying, doing — the right combination depends on the learner. Most companies rely on one mode, usually telling.
5. Not having people who can instruct safely, correctly, and conscientiously. The instructors themselves were never properly trained to teach.
6. No skills matrices or training plans. There is no map of who can do what, who needs to learn what, or by when.
7. Training as binary. "Trained" versus "not trained" — a checkbox for compliance and audit, not a measure of actual skill development. Companies train and record data for compliance reasons, not for developing real capability.

5Key Takeaways

Toyota has a very robust training and skills development program that far surpasses the old TWI JI processes — particularly in teaching skills in an actual live environment through fundamental skills dojos, real standards, and real tools. Unfortunately this book does not cover that material, and perhaps Toyota does not want it disclosed.

• The book's TJI content is solid but generic — it covers what has been known about Job Instruction for decades without showing how Toyota has evolved beyond it.
• Toyota's horizontal skills approach (twenty fundamental skills across an area) is superior to the traditional TWI method of teaching one narrow starter job.
• The common mistakes in training today are the same ones TWI identified in the 1940s. In eighty-plus years, most companies have changed how they create documents but not how they develop people.
• Four of eight chapters in this book focus on TCS — communication and relationships — not on tools or techniques. That ratio is itself a lesson in what Toyota considers most important about leadership.