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Lean Techniques: Yokoten

This tool ensures that lean processes developed in one part of a company become available to all

 Michael Paris

By Michael Paris
Paris Consultants Inc.
Hinsdale, IL

If you have never heard the term Yokoten, prepare yourself. It has been added to the Lean Operations lexicon as an important activity. Yokoten is being used by lean firms to help them become leaner. Yokoten is a Japanese term that can be roughly translated as "across everywhere." In the Japanese lean system, it is used to mean "best practice sharing." In short, Yokoten is used to talk about the transfer of lean manufacturing knowledge and practices from one operation to another.

These best practices can be shared between departments of one plant or sister departments of multiple plants of a company. Operations of a lean plant can be shared with a sister plant that is not so lean or struggling with lean. Although there is little literature to support this, Yokoten could also involve sharing among divisions of the same large company. More importantly, it can also be used to reach out to closely-linked suppliers to make the supply chain leaner.

Practicing Yokoten is a key activity if you are to continually improve both your own operations and those of your supply chain. I must point out here that Yokoten is more than "technology transfer." It is the transfer of actions, practices, Kaizen results, and technology applications. In the US, we have always had a difficult time with "technology transfer," as we have traditionally referred to Yokoten practices. "Not invented here" and "we have little to learn from a firm that has just recalled eight million vehicles for fixes" might be common phrases in a US manufacturing operation. This would be a mistake. Firms in the US have made great strides in the last decade, and should be sharing these new practices within their operations and with key suppliers.

Yokoten is the transfer of actions, practices, Kaizen results, and technology applications.

A second, more pervasive, problem in the US is the lack of a long-term perspective related to operations improvement and lean operations in general. I suspect I'm not the first nor the last to tell you this: Operations Improvement must be a way of life for your firm if you want it to stay lean. Improvement must be continuous and occurring every day. There is no lean destination; there is only the continuous journey toward leaner operations.

When I was a relatively inexperienced consultant, the book, In Search of Excellence, had just been published. A client called the consulting firm I was working for, and asked if we could help them become "excellent." The officers of the firm assured them we could help, and dispatched a young Principal and an equally young Associate to help them. The two made several good recommendations for each of the three plants involved, but stopped short of declaring the nowimproved plants to be "excellent," explaining to the chairman of the board that excellence was a moving concept. Excellence today would not be the same as excellence next year. The chairman was unhappy. This explanation meant he couldn't buy a guarantee of excellence for even one day after we left. The same is true of lean. There is no guarantee that it will continue on its own into the future. We need to exploit Yokoten to assure that we continue to be lean into the future.

If we are to proliferate practices that would improve our sister plants and divisions, and our supplier firms, we ought to think for a few moments how to go about this task. Unless we are asked to do this proliferation within a single plant, we have a large job ahead of us. In a single plant, the plant manager can pretty much say what practices make sense and which do not. He can send a man from Department A to Department B, and tell the Department B people he is there to "help" them and obtain their (perhaps begrudging) cooperation. Moving from Plant A to Plant B is another issue. Moving from Division A to Division B is yet another matter, and moving to the supplier base of Plant A or Division A is a third matter entirely.

If we assume that the second plant, second division, or supplier firm practices the Toyota Production System (TPS), the task becomes easier but still formidable. Let's look at how I suggest we begin practicing Yokoten with a sister plant or a sister division that understands and practices, however loosely, TPS. I suggest a coaching approach.

To begin with, those attempting to bring best practices into a second plant, a different division, or a supplier will be suspected of pushing their own agenda. There will not be a great deal of trust in them and what they have to offer. Coaching, instead of consulting, is a low-threat approach that often overcomes this issue.

In a coaching mode, we aren't there to dictate practices, but to create a safe, encouraging, and supportive environment for employees to think through and put into action a way to make their product faster, of higher quality, at less cost, or with less waste. We are the impetus for creating a process that allows the client to rise to their own level of "excellence." Coaches ask the hard questions about current practices, and help create the space for curiosity, insight, innovation, and creativity to take place.

The coaching process infuses energy into any situation, and the result is clients that are "thinking outside of the box," strategizing solutions in new ways. If we do our job well enough, they will come up with a solution that works for them, with results very close to those of the first plant. They will "own" the solution because they devised it.

The person chosen to be a coach should have a thorough understanding of exactly how coaching works. Although they have gone through the operations improvement within their own plant or department, coaches cannot dictate how this exercise should be done in a second plant. They must suggest that the leader of the implementation team consider what he is trying to do, and suggest some considerations to accomplish this goal. Small mistakes must be tolerated, if not encouraged, as an important and integral part of learning a successful process. A coach should always be available for support and guidance. The coach must also assist in developing goals, so that constant monitoring of "what's really working" takes place.

There are few "naturally" good coaches. The plant just embarking on Yokoten should consider hiring a professional executive coach to do two things: train your engineers on a coaching approach, and walk through a coaching approach with your first one or two installations. This initial investment will pay off in the long term.

The coach should be talking to the team leader of the second plant or department at frequent, regular intervals, and questioning how the improvement is progressing and what pitfalls the team is experiencing. The coach may suggest looking at a certain approach. The team leader is in charge, and if he or she rejects that suggestion in favor of a second approach, the coach must still maintain a positive, supportive attitude. In a situation like this, the coach must proceed cautiously lest the approach be a dead end, and be ready to warn the team leader of impending problems. The coach is more interested in teaching continuous improvement rather than specific solutions, always remembering there are many paths to successful lean operations.

 Today, most costs faced by a manufacturing firm arise in the supply chain. Most firms have supply chains that draw materials, parts, components, and some finished goods from all over the world. Consequently, the supply chain represents the single best opportunity for improving a lean profile. Recent studies have shown that from 60 to 90% of product cost results from operations that take place in the supply chain. In addition, there is the concern about delivery reliability from far-flung suppliers. If a firm is to be lean today, it must address this portion of its manufacturing value chain.

If we wish the supply chain to be lean, we must look where we have the most leverage. Most firms today have learned the vocabulary of lean operations, and many have put into place practices and systematic tools that have helped them to become leaner than they were before they started. Most firms have felt the pinch of the current economy, and are anxious to put into place more and/or better tools that will help them to become leaner still. (Remember, it's a journey.)



If the supplier is small and our firm is a large customer, an offer of help from us would probably be welcomed. If the supplier is large and we make up a small part of his business, he may have already put into place the changes we are suggesting. It does no harm to ask if we can assist, and to tell the supplier what we have been up to in our own organization. Our approach (remember coaching) might be modified to suit the large supplier's needs. For example, the supplier may want to send in his own engineers to study our improvements, and see if they can be adapted to the organization's needs.

If the supplier, large or small, welcomes our help and support, the approach would be very similar to that used when working with a sister plant. Our firm would assign a coach to work with the supplier's improvement team, and our coach would guide the supplier's implementation team through the steps of a continuous-implementation project.

The actual practice of Yokoten in everyday manufacturing is challenging. Maintaining and successfully implementing a continuous improvement program over a lean core is difficult. There are distractions. There are emergencies. There is the ennui that seeps into the most ambitious of programs over time. We have worked with firms that talk about lean as though it were a one-time fix. Richard J. Schonberger talks about this in the conclusion of his book, Best Practices in Lean Six Sigma Process Improvement: "Best Practices, as a whole, is about responding to the customer quickly, dependably, and well. Process Improvement is not a short-term pursuit, nor a narrow one. It is never ending." Yokoten is a tool that can be of real value in achieving this goal.

How Can I Frame Better Questions?

Adapted from Sally Ann Roth,
Public Conversations Project c. 1998

Here are some questions you might ask yourself as you begin to explore the art and architecture of powerful questions. They are based upon pioneering work with questions being done by the Public Conversations Project, a group that helps create constructive dialog on divisive public issues.

  • Is this question relevant to the real life and real work of the people who will be exploring it?
  • Is this a genuine question—a question to which I/we really don't know the answer?
  • What "work" do I want this question to do? What kind of conversation, meanings, and feelings do I imagine this question will evoke in those who will be exploring it?
  • Is this question likely to invite fresh thinking/feeling? Is it familiar enough to be recognizable and relevant—and different enough to call forward a new response?
  • What assumptions or beliefs are embedded in the way this question is constructed?
  • Is this question likely to generate hope, imagination, engagement, creative action, and new possibilities or is it likely to increase a focus on past problems and obstacles?
  • Does this question leave room for new and different questions to be raised as the initial question is explored?


Michael Paris is President of Paris: Consultants in Hinsdale, IL. Paris: Consultants specializes in consulting with and coaching executives of manufacturing and distribution firms all over North America. He can be reached by e-mail at: or by telephone at 630.573.0702


This article was first published in the May 2010 edition of Manufacturing Engineering magazine. 

Published Date : 5/1/2010

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