Key concepts
The key concepts of “lean
thinking” (as shown if figure 1) can be applied across any industry, and are
described below.
Integrated approach
Lean manufacturing aims to
align all function with the common goal of reducing overall cost for the
business, rather than each function attempting to reduce its own costs in
isolation. Thus, the manufacturing system is inherently stronger than a
traditional system where different departments pursue their own objectives
independently of one another. A true lean transformation necessitates that all
functions understand the application of tools and techniques within the
manufacturing system.
Elimination of waste
During the lean transformation,
all functions aim to eliminate waste in a manufacturing environment. Waste can
be defined as anything above the minimum resources required to complete an
activity. Wasteful activities only add cost to a product; they do not add
value.
Hidden becomes obvious
As wasteful activities are
eliminated from a manufacturing system, the true root causes of problems become
visible. Previously, the waste hid these causes. As an example, a large amount
of inventory after a process may have concealed the true problem of the process
– long changeover times. These long change over times would have necessitated
producing in large batches.
Order out of chaos
As problems become visible, the
root causes must be solved to fully eliminate the problems. As problems are
solved, then the manufacturing system becomes more consistent and predictable.
Yet, many traditional organisations are often engaged in a “fire-fighting” mode
because company systems fail in the face of variability. To react to this
variability, such as a change in customer requirements, additional resources are
often brought into processes to “keep the show on the road”. However, a lean
system will adjust efficiently to this variability, helping to bring order out
of the chaos.
Standardisation and continuous improvement
As a manufacturing system
becomes more consistent, then standards can be developed to ensure that the
improvements are maintained. Once standards are in place, they must be
continuously challenged in a bid to make further improvements. Striving for
continuous improvement is referred to as the Japanese word, kaizen.
Ownership
As standards are created, then
ownership of particular processes can be transferred to those closest to the
process itself. Experience has shown that a lean manufacturing system can only
be successful if its ownership is devolved to the people who actually operate
it.
SBR lean manufacturing model
The SBR lean manufacturing model illustrates the key concepts and operating
principles for lean manufacturing.
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