I’ve read a lot of books and papers over the years that, in one way
or another, touch on the subject of lean, and very few made the
connection with the teachings of W. Edwards Deming. Besides the fact
that Deming had a huge impact on Toyota over the years, I don’t think it
is possible to truly appreciate lean without a basic understanding of
his philosophy on management.
I’ve included some quotes from
Deming in this post to help demonstrate how his views on leadership and
organizations helped form the foundation of the Toyota Production
System. Although one of the objectives of lean is simplicity, the
methodology can be very complex, requiring a level of understanding of
organizational behavior that I don’t think many people truly
appreciate. Success requires a continuing commitment to learn about the
theories upon which lean was built in order to understand and deal with
the specific situations, relationships, and interactions that make up
an organization. The more you understand the
what and
why of lean, the more effective you will be with the
how during the deployment.
Deming would never tell anyone
how
to implement his theories – in fact, he would become visibly frustrated
whenever anyone asked him about specific situations. Like every great
teacher, Deming would provide enough guidance to make one think and
learn. As it turned out, Deming’s theory of management provided the
what and leaders at Toyota, Canon, and other companies used to develop the
how.
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“The average American worker has 50 interruptions a day, of which seventy percent have nothing to do with work.”
The
above statement covers the concepts of flow of work and value. Without
a clear and consistent understanding of the value provided by the
organization, there is no way to know what has to “do with work” and
what doesn’t.
“The emphasis should be on why we do a job.”
To
prevent waste and guide improvement within an operation, those doing
the work must understand value associated with the work. Deming
commonly used the example of cleaning a table to clarify the concept of
operational definitions. How can the person cleaning the table
understand the level of quality required without first understanding why
they are performing the job in the first place. If the table is to be
used as a workbench, it would require a different level of cleanliness
as a lunch table, which is different from an operating room table. The
“why” provides direction for identifying and reducing waste within the
work.
“When a system is stable, telling a worker about mistakes is only tampering.”
A
stable system is one where the level of variation is predictable.
Improvement of a stable system requires management action. Pressuring
workers to improve quality in a stable system will lead to frustration,
stress, and most likely lower quality. This is a commonly forgotten
concept in the kaizen process.
"Everybody
here has a customer. And if he doesn't know who it is and what
constitutes the needs of the customer...then he does not understand his
job."
A statement on internal customers and systems
thinking. A change in one area of the process, regardless of the impact
on that particular area, is not an improvement if it negatively impacts
the system as a whole. Without understanding the system, it is not
possible to clearly understand how each area supports the others.
“Experience without theory teaches nothing”
The
Plan-Do-Study-Act (PDSA) cycle is central to lean and continual
improvement – and a central theme to the cycle, which many people do not
understand, is the need to clearly state a hypothesis to test.
Learning, which is critical to the success of a business, occurs through
testing a hypothesis and studying the results.
“It is not enough to do your best; you must know what to do, then do your best.”
A
business must know its purpose (including mission and vision) and
continually connect its activities with the purpose. The business
planning process consists of deploying strategies that will continually
move the organization closer to its purpose. Attempting to improve
activities that are not aligned with the purpose – something that is
unfortunately all too common in business – is waste. In lean terms, the
“what to do” are the value-added activities.
“All anyone asks for is a chance to work with pride.”
One of the principles of the Toyota Production System is
respect for people.
Allowing (and sometimes rewarding) non-value-added work to occur shows a
lack of respect for people. Generally, people come to work motivated
and ready to contribute to the organization’s success. Loss of
motivation, mistakes, and high turnover result from management issues
and, if these become a problem for the organization, it is up to the
leaders to look at themselves to understand the reasons and make
corrections.
“Any manager can do well in an expanding market.”
This
is closely related to the “experience without theory” statement. If
leaders do not have a theory to explain an increase in performance,
there is no guarantee that the success will continue. The true test of
management ability is during a downturn because that is where the
organization’s weaknesses will show up.
“Learning is not compulsory . . . neither is survival.”
Lean
is about striving for absolute perfection. Although perfection is
something that is impossible to ever achieve or sustain it is
nevertheless the focus of continually improving. Continual improvement
requires continual learning as markets, suppliers, customers,
technology, and the overall environment changes – and learning does not
happen by accident. It is the result of driving the PDSA cycle into the
organization’s culture.
Understanding the Foundation for Lean
This
post could go on and on with additional quotes from Deming that help
build the foundation upon which to build a lean mindset. The objective
here was to make the connection and stimulate further learning in
Deming’s system of management because I truly believe that doing so will
lead to a stronger and more sustainable transformation of the
organization.