Womack and Jones (2003) defined lean thinking as s an antidote for waste.

Definition I use is slightly modified version of Stone's* (2012):

  • lean thinking refers to the operational philosophy of the organisation,
  • lean principles refer to underlying theories of lean thinking strategies,
  • lean tools refer to tools used to execute lean thinking strategies, and,
  • leanness describes the state of the organisation's transformation to lean thinking.

In the Lean Thinking article series I will cover four topics listed above.

Let's go on an amazing journey into the past.

* Stone (2012) defines lean principles as tools used to execute lean thinking strategies. Since the word principles is synonym for rules, the author's definition remains unclear. Although it could be argued that rules could be used as tools, it has been decided to break down the definition to lean principles and lean tools. The aim of such disambiguation is to separate the theory (principles) upon which tools are built and used.

From mass manufacturing to Toyota Production System to Lean Thinking

Lean thinking has its roots in both mass production and Toyota Production System.

Henry Ford pioneered the mass production (Davies & Hounshell, 1985) by achieving high rate of part interchangeability and implementing moving assembly line. In the same period Frederick Winslow Taylor established scientific management (Taylor, 1911).

Ford adopted and applied scientific management, resulting in layered organisational structure where it was expected that workers will obediently work while management would do the thinking. Such approach to workforce led to change in labour relations and worker unions (Katz, 1985). Later Alfred Pritchard Sloan of General Motors added the business elements to the mass production (Womack et al., 1990; Sloan, 1964), like marketing and management techniques.

While mass production was strong in the Unites States, it faced resistance in European countries which were still predominately oriented towards craft production. Ford achieved what he referred to as the true mass production in 1927 at the Rogue complex (Womack et al., 1990).

A number of people visited the complex and discussed the principles of mass production with Ford. Some of these people were from Europe and planned to implement mass principles in their home countries, but their efforts were abruptly stopped when Second World War broke out. After the war ended, knowledge transfer was resumed and mass production started to spread in Europe.

After almost five decades of evolution, in 1955 mass production was a mature system dominating the manufacturing sector. Companies which adopted mass production early, like Ford and General Motors, were producing high volume of products and kept pushing it into the market.

Worker dissatisfaction became focus of numerous research papers, unions were fighting with higher management (Katz, 1985), companies were competing solely on the basis of product or service cost (Womack et al., 1990), quality was considered as additional cost and product customisation was low.

Still, without the critical mass or agent of change there was no incentive for further development of the system.

In 1920s Sakicihi Toyoda laid foundations for the Toyota way by devising two problem-solving approaches, namely jidoka and five-whys (Ohno, 1988; Mass & Robertson, 1996). Later Kiichiro Toyoda, inspired by the Rogue complex, came to the idea of just-in-time (Ohno, 1988).

After Second World War Japan was economically devastated, and United States instituted new labour laws (Nishiguchi, 1989). Toyota Motor Corporations wished to implement mass production, but soon realised that they lack resources required to do so.

Taichi Ohno and Shigeo Shingo started to devise new approach to production, adequate to conditions of post-war Japan (Shimokawa & Fujimoto, 2009). That approach was later named Toyota Production System (TPS) (Ohno, 1978; Ohno, 1988), and eventually evolved into the Toyota Way (Toyota motor corporation, 2012).

Toyota educated its first tier suppliers in TPS, while they would then proceed to educate their first tier suppliers (second tier suppliers of Toyota). Such knowledge transfer cascaded downstream, and was additionally supported (or enforced) by keiretsu, a type of informal business group.

Hill, (2012) defines keirtesu as a set of companies with interlocking business relationships and shareholdings. In The machine that changed the world (Womack et al., 1990) keiretsu groups are briefly described, mostly in positive tone.

Keiretsu groups might have had significant impact on the success of the Toyota Production System (Lincoln et al., 1996; Dyer, 1996). There are a number of papers assessing keiretsu system (Gilson & Roe, 1993; Ahmadjian & Lincoln, 2001; McGuire & Dow, 2003), yet there are virtually no papers assessing the relation between keiretsu system and lean. This interesting knowledge gap is unlikely to be filled due to closed nature of Japanese businesses.

Successful implementation of the new manufacturing paradigm imposed by TPS allowed Japanese businesses, specifically Toyota, to penetrate the world market.

In 1984 International Motor Vehicle Program (IMVP),  founded at the Massachusetts Institute of Technology, launched an extensive benchmarking study of automotive industry. The result was a book The Machine that Changed the World, which marked the beginning of lean paradigm.

During the study Taichi Ohno's and Masaaki Imai's books were translated into English (Ohno, 1988; Imai, 1986) providing valuable insight into the elements of TPS.

The study has stated that lean is the paradigm of the future and that mass production should be abandoned as soon as possible. Still, without adequate theoretical models and frameworks, companies could not undertake lean transformation process.

Those companies which did start to implement lean principles usually had some link to Japanese businesses (Womack et al., 1990). In order to provide underlying theory for lean implementation and transformation Womack founded The Lean Enterprise Institute, followed by two publications explaining lean fundamentals (Womack, 1996; Rother, 1999).

In 2000s publications from Jeffrey Liker (Liker, 2004; , Liker, 2006; Liker, 2008;, Liker, 2011) provided even more insight in the Toyota way, enriching the lean thinking in the fields of management, leadership and culture. It can be concluded that publications of The Lean Enterprise Institute and Jeffrey Liker are the most representative of the lean body of knowledge.

Table below presents historical overview of mass production, the Toyota way and lean thinking. It should be noted that the emphasis was on presenting the publications and achievements which were enablers for each of aforementioned paradigms.

Mass production is covered from 1900s to 1960s, emphasizing the work of Henry Ford. After 1960s two new major paradigm shifts are mentioned, namely flexible production (Tolio, 2008) and mass customization (Blecker & Friedrich, 2006).

The Toyota Way is covered from 1920s to 2000s, emphasizing the creation of the TPS and later evolution to the Toyota Way. 5R programme is mentioned since it represent Toyota's efforts to implement environmental aspects into the TPS (Toyota Motor Corporation, 1999). Five R's are refine, reduce, recycle and retrieve energy.

Lean thinking is covered from 1990s to 2010s, from inception of the term lean to latest publications. Emphasis was put on the publications of The Lean Enterprise Institute and Jeffrey Liker.

Historical overview of mass production, the Toyota way and lean thinking:

Period Mass production The Toyota Way Lean Thinking
1798 Eli Whiteney - Interchangeable parts
1900s 1908 Henry Ford achieves perfect part interchangeability
1910s 1911 Frederick W. Taylor - Principles of Scientific Management
1913 Henry Ford implements moving assembly line
1913 Henry Gantt - Gantt charts
1915 Transition to mass production
1920s Sakichi Toyoda - Jidoka and Five whys
1925 Alfred Sloan adds business elements to mass production, professional management
1926 Henry Ford proposes term mass production
1927 Henry Ford achieves "true mass production" at the Rogue complex
1930s Kiichiro Toyoda - Just-in-time principle
1940s 1948 Pull principle
1949 Henri Fayol - General and Industrial Management
1950s Mass production starts to spread in Europe Quality improvement programme inspired by the teachings of Deming and Juran
1953 Taichi Ohno - Kanban, production levelling
1955 Final form of mass production
1960s 1960 Alfred Sloan - My years with General Motors 1960 Preventive maintenance
1962 Kaoru Ishikawa - Quality circles
1962 Shigeo Shingo - Poka-yoke
1970s 1971 Total productive maintenance
1978 Taichi Ohno - Toyota Production System
1980s Development of flexible production
1983 Monden Yasuhiro - Toyota Production System an integrated approach to JIT
1984 Beginning of the IMVP reserach
1986 Masaaki Imai - Kaizen (in English)
1988 Taichi Ohno - Toyota Production System (in English)
1990s 1990 5R programme 1990 Womack and Jones - The Machine That Changed the World
1996 Womack and Jones - Lean thinking
1999 Rother and Shook - Learning to see
2000s Development of mass customization
2001 The Toyota Way
2002 Increased interest in lean due to economical crisis
2003 Womack and Jones - Lean thinking (Second Edition)
2004 Jeffrey Liker - The Toyota Way
2005 Womack - Lean Solutions
2008 Jeffrey Liker - Toyota culture
2010s 2010 Mike Rother - Toyota kata
2012 Jeffrey Liker - The Toyota Way to lean leadership

Four decades of academic interest in the Lean Thinking

Academic interest is important for any paradigm, as it produces objective scientific papers which are rigorously assessed by the scientific community.

Table below presents four decades of academic interest in lean thinking, from 1970s to 2000s, based on the literature review study from Stone (2012). First column represents time frame, second column represents relevant phase and third column shows the number of publications in its respective period. Only peer reviewed publications with more than 3 citations from manufacturing sector longer than four pages were counted.

Period Phase Published quantity
1970–1990 Discovery 11
1991–1996 Dissemination 31
1997–2000 Implementation 28
2001–2005 Enterprise 56
2006–2009 Performance 67

Discovery phase includes Drucker's article (Drucker, 1971) as one of the first to asses the managerial practices of Japanese businesses (New, 2007). Most important publications from that period are those from the MIT's IMVP programme and ultimately The Machine that Changed the World.

After term lean was established and promoted, a phase of dissemination took place from 1991 to 1996, with publications focusing on articulating the principles of lean. Lean thinking from Womack and Jones – first edition published in 1996, second in 2003 – is an important publication from that period, providing lean principles and implementation framework.

Implementation phase followed, with publications focused on analysing the strategic, managerial, human and organisational aspects of lean. Economic crisis and publication (or more precisely, annunciation) of the Toyota Way led to increased interest in the lean paradigm.

Publications from the enterprise period assessed the lean paradigm in various business sectors, mainly white collar jobs (Brandenburg & Ellinger, 2003; Comm & Mathaisel, 2005; Holton III, 2003; Hyer & Wemmerlöv, 2002; Mann, 2002; Scaffede, 2002; Seitz, 2003). In 2006 Toyota Motor Corporation surpassed General Motors as the largest vehicle manufacturer in the world (Holweg, 2007), which led to further increase of interest in the lean paradigm.

During performance phase publications were mainly from Toyota executives and consultants (Shimokawa & Fujimoto, 2009; Liker, 2006; Liker, 2008; Osono et al., 2008), providing inside knowledge of the Toyota Way, while journal publications focused on measuring leanness and replication of successful lean transformation.

Concluding remarks

In this article we went on a journey into the history of lean thinking.

Now let's look into principles and tools associated with it.

References

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This article is a part of Lean Thinking series:

Lean Thinking: origin
A journey from mass manufacturing to Toyota Production System to Lean Thinking.
Lean Thinking: principles and tools
Understanding principles behind the lean thinking is critical for our ability to make a change for the better.
Lean Thinking: assessing leanness
How can we measure process cycle efficiency, overall equipment effectiveness, and organisational leanness?
Lean Thinking: critique
Is lean thinking a copy of the Toyota Way or a standalone philosophy built upon two powerful paradigms of the past?