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As sited in "Lean Thinking", Lean Global Network - James Womack and
Dan Jones.
1.
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Define Value - from the Customer
perspective
The customer perspective of value is a critical test
of any activity. They pay for things they believe are of
value, which is different from them buying things that we think are
valuable.
Recently, I visited a plant where the manufacturer took pride in the
presentation of their product. They manually finished off each
item, to allow for excellent presentation in the retail store. The
retailers visited the plant as part of a familiarisation and feedback
process, and they commented that once the products got to the store, the
product had to be cut free of the packaging – and it was sold to
the public like that.
As a matter of good customer relations, routinely confirm with customers
what they need. We also need to confirm what they do not need, so
we don’t spend effort creating something that is of no additional
value.
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2.
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Identify the Value Stream
The value stream is made up of all the tasks that
need to be completed to provide the finished product or service to the
customer. Many of the tasks we undertake in a value stream do not
add any additional value to the customer. By creating a
‘map’ of the value stream, we can easily identify tasks that
add value – and those that do not.
There are 3 classic value streams – each making out a complete
phase of a product or service
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From design concept to
production
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From initiation to fulfilment of an
order – This value stream is used through the rest of this
document.
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From Despatch to payment of
invoice
Non value adding tasks are
waste. We refer to waste as ‘Muda’ – much of
which can be eliminated from the value stream. Some wasteful tasks
may need to continue to be done due to internal business constraints.
However, the ultimate goal will be to remove as much muda from the value
stream as possible.
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3.
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Optimise Flow
Traditional manufacturing has been built on a base of
batch and queue. Within a lean environment we are taking a
different pathway. We are focussed on the customer and creating a
specific value stream, designed to meet their needs. We are
attempting to eliminate muda from the value stream, and reduce the
lead-time for delivery of the product or service.
This means we should now reduce batch
sizes. We may want to physically re-arrange the layout to mirror
the value stream, and try to achieve more of a continuous movement of
the product through the value stream. When we do this at first, it
will allow us to see things such as:
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Free floor space – where
previously we did not have any
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We may find we have too many
‘materials handling’ devices in a manufacturing
environment
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Our ability to change from one task
to the next is clumsy, and needs to be improved
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Our employees may not be
multi-skilled
The positive observations at this
point are permanent. The negative observations can be changed
through improving our skills, or changing some resources, which more
closely meet our needs.
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4.
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Pull from the Customer
When working on the flow in the value stream, we
focussed on eliminating muda. In a similar way, we only want
to build what our customer needs, when our customer needs it. So
we let our customer be our scheduler, and tell us what we should be
making day by day.
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5.
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Drive toward Perfection
There are many obstacles to be overcome in order to
achieve a lean environment. We have created wonderful machines
that can do one element or task at lightening speed. However, the
product then sits in a queue until the next rapid stage of processing,
and we make things in this stop-start-stop-start environment. We need to
overcome this and many other obstacles to eliminate all the muda out of
the value stream.
We will not be able to do it in one project, so the cycle is continuous,
and we get continuously better at it.
Don't stop.
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