Lean Thinking is a methodology used by various businesses across
the globe to provide a new way to
think about how to organize human activities to deliver more
benefits to society and value to individuals while eliminating
waste. The aim of lean thinking is to create a lean enterprise, one
that sustains growth by aligning customer satisfaction with
employee satisfaction, and that offers innovative products or
services profitably while minimizing unnecessary over-costs to
customers, suppliers and the environment. The basic insight of lean
thinking is that if you train every person to identify wasted time
and effort in their own job and to better work together to improve
processes by eliminating such waste, the resulting enterprise will
deliver more value at less expense while developing every
employee's confidence, competence and ability to work with
others.
The best example of a business that adopted lean thinking is
Toyota Motors company. The company has risen from a bankrupt
japanese company to today's market leader in its industry.
At
every stage of its expansion, Toyota remained a puzzle by capturing
new markets with products deemed relatively unattractive and with
systematically lower costs while not following any of the usual
management dictates. In studying the company firsthand it appeared
that it had a unique group of elders (sensei) and coordinators
(trainers from Japan) dedicated to help managers think differently.
Contrarily to every other large company, Toyota's training in its
formative years was focused on developing people's reasoning
abilities rather than pushing them to execute specialist-derived
systems.
The
masters in lean thinking would challenge line managers to look
differently at their own jobs by focusing on:
- The workplace: Going and seeing firsthand work
conditions in practice, right now, and finding out the facts for
oneself rather than relying on reports and boardroom meeting. The
workplace is also where real people make real value and going to
see is a mark of respect and the opportunity to support employees
to add value through their ideas and initiative more than merely
make value through prescribed work. The management revolution
brought by lean thinking can be summed up by describing jobs in
terms of Job = Work + Kaizen
- Value through built-in quality: Understanding
that customer satisfaction is paramount and is built-in at every
step of the enterprise's process, from building in satisfying
features (such as peace of mind) to correctly building in quality
at every production step. Built-in quality means to stop at every
doubtful part and to train yourself and others not to pass on
defective work, not to do defective work and not to accept
defective work by stopping the process and reacting immediately
whenever things go wrong.
- Value streams through understanding "takt"
time: By calculating the ratio of open production time to
averaged customer demand one can have a clear idea of the capacity
needed to offer a steady flow of products. This “takt” rhythm, be
it a minute for cars, two months for software projects or two years
for a new book leads to creating stable value streams where stable
teams work on a stable set of products with stable equipment rather
than optimize the use of specific machines or processes. Takt time
thinking leads to completely different capacity reasoning than
traditional costing and is the key to far more frugal
processes.
- Flow through reducing batch sizes: Every
traditional business, whether in production or services, is
addicted to batch. The idea is that once work is set up one way,
we'd better get on and quickly make as many pieces of work as we
can to keep the unit cost down. Lean thinking looks at this
differently in trying to optimize the flow of work in order to
satisfy real demand now, not imaginary demand next month. By
working strenuously on reducing change-over time and difficulty, it
is possible to approach the lean thinking ideal of single piece
flow. In doing so, one reduces dramatically the general cost of the
business by eliminating the need for warehouses, transports,
systems, subcontractor use and so on.
- Pull to visualize takt time through the flow:
pulling work from upstream at takt time through visual devices such
as Kanban cards is the essential piece that enables lean thinkers
to visualize the gaps between the ideal and the actual at the
workplace at any time. Pull is what creates a creative tension in
the workplace by both edging closer to single-piece-work and by
highlighting problems one at a time as they occur so complex
situations can be resolved piecemeal. Pull is the basic technique
to “lean” the company and, by and large, without pull there is no
lean thinking.
- Seeking perfection through kaizen: The old
time sensei used to teach that the aim of lean thinking was not to
apply lean tools to every process, but to develop the kaizen spirit
in every employee. Perfection is not sought through better, more
clever systems or go-it-alone heroes but through a commitment to
improve things together step-by-small-step. Kaizen literally means
change for the better and Kaizen spirit is about seeking a hundred
1% improvements from everyone every day everywhere rather than one
100% leap forward. The practice of kaizen is what anchors deep lean
thinking in people's minds and which, ultimately, leads to complete
transformation. Practising kaizen together builds self-confidence
and the collective confidence that we can face our larger
challenges and solve our problems together.
Lean thinking improves efficiency,
reduces waste, and increases productivity.
- Increased product
quality: Improved efficiency frees up employees and
resources for innovation and quality control that would have
previously been wasted.
- Improved lead
times: As manufacturing processes are streamlined,
businesses can better respond to fluctuations in demand and other
market variables, resulting in fewer delays and better lead
times.
- Sustainability:
Less waste and better adaptability makes for a business that’s
better equipped to thrive well into the future.
- Employee
satisfaction: Workers know when their daily routine is
bloated or packed with unnecessary work, and it negatively affects
morale. Lean manufacturing boosts not only productivity, but
employee satisfaction.
- Increased
profits: And, of course, more productivity with less waste
and better quality ultimately makes for a more profitable
company.