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What
Is Lean Manufacturing?
[For
information on cost-effective services for Lean,
please click
here]
Lean
Manufacturing, often called Agile Manufacturing, is
an operating strategy that seeks
to maximize operational effectiveness by creating
value in the eyes of the end customer. The focus is
not on a department, area or process, but on the
optimization of the entire value stream -- the
series of processes between receipt of customer
order and delivery of finished product.
Lean
manufacturing improves operating performance by
focusing on the quick and uninterrupted flow of
products and materials through the value stream. To
achieve this, the various forms of manufacturing
waste
must
be identified and eliminated. Waste can include any
activity, step or process that does not add value
for the customer.
Under
such a system, the plant is highly
customer-focused, providing the highest quality,
lowest cost products in the least amount of
time.
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Key
Elements of a Lean
System
1.
Analyze the value stream to
identify those factors that do
and do not create value from the
customer's point of
view
2.
Streamline
the flow of information,
materials and products through
the value stream to
eliminate
interruptions, waiting,
scrap,
etc.
3.
Institute a quick changover or
set-up time reduction improvement
program to minimize equipment
downtime between product changes
and to improve manufacturing
flexibility.
4.
Where possible, adopt
"pull"
production
and one-piece flow methodologies
to synchronize manufacturing
processes and produce to order
rather than to stock
5.
Create manufacturing
cells
(work cells or cross-functional
teams) to focus production
efforts around products rather
than around process technology
centers (departments) and to
ensure responsibility for quality
at the operating level
6.
Make operating performance and
customer information visible on
the shop floor to increase
customer focus
7.
Adopt lead time metrics
throughout the plant and
continually identify ways to
contract them
8.
Involve employees plant-wide in
continuous improvement and kaizen
efforts to improve operating
performance and accelerate
achievement of business
goals
9.
Institute a Total
Productive Maintenance
(TPM)
system to increase equipment
efficiency and reliability and to
enhance "ownership" at the
operating level
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Successful
implementation of Lean Manufacturing typically
starts with an analysis of the value stream to
identify non-value-added activities
(waste)
in the process
flow. By adopting "pull"
production
and one-piece
flow,
synchronous manufacturing is achieved with minimal
WIP and finished goods inventories, minimal waiting
time and minimal manufacturing
lead time.
Such strategies aim to produce only what is
required for immediate sale, and the entire
production process is triggered by customer demand.
A "push"
strategy,
on the other hand, seeks to maximize asset
utilization at each work center, thus building
piles of inventory between work centers,
disconnecting them from one another and extending
lead times.
Another
lead time reduction technique, set-up time
reduction, also known as quick changeover or
single-minute exchange of dies (SMED), seeks to
improve proficiency
with product changeovers on machines to enable
shorter production runs and greater manufacturing
flexibility. Quick changeover capability is vital
in an environment of non-dedicated production lines
and changing customer needs (and, therefore,
production schedules). In high-performance
operations, schedule changes do not throw the
production floor into chaos. Manufacturing
effectiveness is not measured by maintaining high
efficiency during long production runs, but by
reacting quickly to changes and being able to
consistently meet the daily production
schedule.
The
lean approach often requires the transformation
from a departmental-based organization to one
centered around products or product families. These
responsibility
centers, often called manufacturing
cells,
or simply work
cells,
focus on a whole product or service within the
plant. Plant floor management and communication are
facilitated because the entire product line is
manufactured in a specific area. In addition,
product performance (cost, quality and delivery)
can be more easily monitored, controlled and
improved at the operating level by the people who
actually make the product.
Finally,
plant personnel are a vital element in successful
implementation of Lean Manufacturing.
Plant-wide participation in continuous improvement
and kaizen events is a critical difference between
high-performance plants and the rest. Employee
involvement in and accountabilty for basic
equipment maintenance as part of a total
productive maintenance
(TPM)
program helps improve both equipment reliability
and employee morale.
For
an article on Lean Manufacturing, please
click
here.
If you're interested in successfully applying Lean
Manufacturing principles at your facility, Granite
Bay has a value-based solution!
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