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The Cascade of Hoshin

by James P. Womack
August 3, 2018

The Cascade of Hoshin

by James P. Womack
August 3, 2018 | Comments (8)

For many years I have watched as organizations attempt to implement hoshin planning (strategy deployment, if you prefer.) They pick a few big issues important to the long-term success of the organization – a leap in quality, a dramatic drop in costs, a reduction in lead time to better meet customer demand, a fundamental rethink of the type of value the organization creates for customers. And they try to deploy initiatives to address these issues down through the levels of the organization. But even when they limit the initiatives to a small, manageable number they rarely succeed.

What starts with the loud voice of the CEO at the top becomes a faint whisper by the time it reaches the front lines of the organization where value of whatever description is created and where improvement becomes real. At this level managers are mostly absorbed with daily chaos, with no workable method for addressing hoshin objectives even if they are clearly stated and prioritized for that level.

Recently I have had the opportunity to closely observe hoshin planning at Toyota, which has developed the management mechanisms necessary to translate high-level hoshin plans into sustainable results on the front lines. Let me describe what I’ve seen.

Toyota President Akio Toyoda and the senior leadership team have decided that the simultaneous emergence of autonomy, alternative energy, shared assets, and hyper-connectivity are collectively creating a “once-in-a-century disruption” in the auto industry as it transitions to a mobility industry, commonly termed Mobility 2.0. (Whether this is true or not is a separate question, although every other legacy car company has reached the same conclusion. My point here is about successful deployment of hoshin, not the validity of the hoshin vision.) And recently Toyota has had to add an extra dimension to the challenge: Uncertainty about global trading rules, which might require substantial relocation of existing production, with loss of revenue and increased costs.

Because many things are changing at once and the right path to follow for each dimension of the Mobility 2.0 challenge (plus the changing rules of trade) is impossible to know, Toyota is responding by extending its principles of concurrent engineering with set based design from individual vehicles to whole mobility systems. For example, it is experimenting with:

  • Level 4 autonomy where vehicles drive themselves and Guardian, a system which leaves driving to the driver but prevents the driver from making dangerous mistakes.
  • Electric vehicles with pioneering solid-state batteries and hydrogen fuel cell vehicles.
  • Partnerships with ride hailing firms and logistics firms like Uber and Amazon and experiments with Toyota fleets of shared, autonomous vehicles (to be showcased at the 2020 Tokyo Olympics.)
  • Toyota Connected for connectivity between vehicles, passengers and their environment and partnerships with other connectivity providers.

And, perhaps most interesting, a major push to apply TPS principles to the development of the enormous software packages needed for each of these innovations.

Many of these experiments may fail. And, even if a number of the concepts prove worthy of widespread adoption, Toyota must expend massive sums now for lengthy experiments to determine which work best while defending its current employees, always a core Toyota principle. So the primary strategic hoshin of “address the once-in-a-century-disruption of the automotive industry” needs a companion operational hoshin of “create the financial resources to support the respond-to-disruption hoshin.” This is where operational hoshin done right -- all the way to the value-creating front lines -- comes into play to provide the critical means to a vital strategic end.

The specific means were recently visible to me on the shop floor at Toyota Kyushu’s Miyata assembly plant on the southern Japanese island of Kyushu. (This plant assemblies Lexus vehicles.) The hoshin objective that came down to the plant for this year is a target to substantially reduce costs while accommodating a richer model mix while reducing takt time to meet increased demand (with substantially no capex) while sustaining assembly quality at the current level, which is reported by J.D. Power and Associates to be the highest in the world.

To be clear: This means increasing the production rate with no capital spending while sustaining world-best quality and reducing the number of workers required on the line (of which, more in a moment.) This will save money that will be used for experiments with Mobility 2.0. And these experiments will permit Toyota to survive and defend jobs in the long run. Wow. This is big. And complicated. How exactly to do this?

The background for the how is important to understand:

The Miyata plant has a very mature lean production system that has created basic stability: the production line runs more than 98% of the time with about 1,000 Andon pulls per day in final assembly. Almost all of these are addressed by team leaders within takt time to steadily produce good vehicles with very little rework. This means in turn that managers are not bogged down in fire-fighting and have time available to think about improvement in the context of hoshin targets.

The plant is facing a labor shortage that is certain to become more severe with every year as the Japanese population falls steadily due to the very low birth rate and the country’s unwillingness to depend on guest workers. So eliminating jobs on the line while defending the current workforce is both necessary and easily addressed by not hiring replacements for retirees.

Finally, the stable work force including the front-line production associates has been trained for many years in trouble shooting (to keep production going with short-term countermeasures), problem solving (to eliminate repeat problems), kaizen (to raise the production standard), and Jishuken. The latter is a special form of value-stream (not point) kaizen designed to examine a whole production activity (e.g., a line or a department) over an extended period (perhaps three months.) This is led by the line managers and the production associates rethinking every aspect of their work to achieve a hoshin goal.

Now let me introduce the Jishuken team I recently met, working on one portion of the Miyata final assembly line. (This is one of many similar teams on every portion of the line and in other areas across the plant.) The group leader and the four direct-report team leaders for this portion of the line had worked for three months to redesign every job and improve many pieces of equipment using Karakuri principles (see Matt Savas’ Lean Post, Developing People Not Robots Through Karakuri.) Their objective was to achieve their clearly stated hoshin goal.

(I would love to provide the particulars – the substantial reduction in takt time, the minimal capital spend, the positive consequences for quality, all of which were very impressive. And I also would love to provide photos of the many ingenious Karakuri devices built by the team. But I was at Miyata as a guest to learn, not as a journalist to share the details of their detailed business plans with the world.)

An explanation of what they had done made a nice presentation in a team room. But it really came alive when I visited their portion of the line to see in detail what they had done. I have never observed detailed kaizen at this level of intensity (on a production process that was already one of the best in the world.) More impressive to me, it was conducted by the front two levels of line management – team leaders and the group leader rather than staff experts -- in collaboration with the twenty or so production associates, with an amazing level of engagement. They could hardly stop talking about what they had achieved and showing the ingenious, low-cost tools, fixtures, and materials presentation devices they had built and installed.

These types of efforts have been underway at Toyota facilities across world for several years as the company continues to build its war chest for the challenge of disruption. (See CEO Akio Toyoda’s comments accompanying the release of this year’s financial results on May 9. They are a remarkably sober and focused discussion of Toyota’s circumstances and hoshin plans despite its record sales, earnings, and cash balance.)

Is this cost-reduction effort, enabling an extraordinary range of experiments, enough for a massive legacy company to survive a once-in-a-century disruption? Or is the perceived disruption a misunderstanding of the situation, a mirage? Who knows. What I do know is that the methods I saw at Miyata for deploying hoshin down to the front lines offer an important lesson for all of us in the Lean Community as we try to cascade our own hoshin plans down to the point of value creation where they become truly useful.

P.S. A brief glossary of terms used in this piece:

Andon - A visual management tool that highlights the status of operations in an area at a single glance and that signals whenever an abnormality occurs (taken from Lean Lexicon)

Karakuri - a method of kaizen that employs simple apparatus, such as pulleys and counterweights while prohibiting use of hydraulics, robotics, and electricity. 

Jishuken - special form of value-stream kaizen designed to examine a whole production activity (e.g., a line or a department) over an extended period (taken from Jim’s article)


The views expressed in this post do not necessarily represent the views or policies of The Lean Enterprise Institute.
Keywords:  hoshin kanri,  kaizen,  leadership,  Toyota
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Michael Ballé August 04, 2018
5 People AGREE with this comment

Thank you Jim, for this fantastic post,

It reflects exactly the spirit of lean that I feel we've been losing: expressing and facing our challenges, forming solutiosn from gemba countermeasures from kaizen on the shop floor, and critically, understanding cost reduction through better use of capital as you describe in the Miyata plant.

The challenges coming up are daunting, but also exciting, and lean is a way to both face them more agressively as well as more steadily and cautiously through rational experimentation as you describe. Fantastic.

Here's my question: did you manage to get into the engineering side of the Miyata operation? One way of interpreting 98% is a measure of how good the design knowledge is: the way of assembling the car is so well known, in detail, that the line runs at takt time 98% of the time, which is incredible (and ripe for taking positions out?) - andon pulls reveal further problems: are they fed back to engineering?

I feel that we have collectively grasped the lean managerial shift from "command-and-control" to "challenge-and-support" which you illustrate so well with Toyoda's hoshin and the plant's Jishuken activities. On the other hand, our challenge, I believe, is understanding the engineering side of things and how Toyota sets out these product-defining experiments. 

Clearly, they're going to be less forthcoming about this, but did you happen to find out any specifics in your visit?

Many thanks for sharing! Great post!

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Nate Hurle August 07, 2018

What I really like about it is how through hoshin they are able to tie everyone into the goals, but in very different ways.  Mobility presents numerous new challenges, technologies, etc.  There is a group within Toyota that is working on developing this.  In the meantime there are traditional cars that still need to be produced for the current market.  How do we tie what people are doing every day in this traditional space into the future?  The reality is that not every employee is going to focus on the future of mobility in terms of inventions and figuring out how it works, but they all can participate in Toyota’s future with clear goals and how they support it.

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Vickie Dolis August 09, 2018

As a coach of lean, value stream mapping, and business plan deployment for a large automaker, I found your article quite valuable.  After experiencing Hoshin Kanri for 3 years at NUMMI, I continue to be impressed by the way Toyota ties together their Hoshins all the way down to the shop floor while using a form of Kata to continuously improve and engage their people. Their enablers and discipline are powerful. Thank you for sharing your experience.  It has caused me to stop and think once again about how I can improve my coaching to help my own company meet the challenges of the future.

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Janet Spiegel August 09, 2018

Thank you for sharing this, Jim.

I'm trying to visualize the strategic hoshin to disrupt and the companion operational hoshin. Are they separate or interwoven?

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Chote Sophonpancih August 11, 2018

98% of takt time and 1,000 Andon a day are amazing.  

Is it correct to say that without so many andon the performance would not be so impressive? Is numerous andon natural ? Is quick response the critical factor? 

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Michele Liberati August 18, 2018

Cascading strategic objectives from top management into operational practices and value adding people's committment, is a fashinating results of hoshin kanri. Thanks Mr Womack for sharing such new and (apparently) simple insights about this process. i am wondering in which could be the "critical few" for making it alive in other cultures and context?

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leo lopes February 23, 2021

obrigado pelo post, o Sr. é um mestre na arte do Lean

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leo lopes February 23, 2021

Obrigado pelo post Sr. James

O Sr. é realmente um mestre na arte do Lean

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