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Cellular
Manufacturing - A Primer
Cellular
manufacturing, also known as work cells, flexible
manufacturing cells (FMCs)
or simply cells, represents an alternative
organizational structure that seeks to reduce
manufacturing lead
times,
improve product cost, quality and delivery and
create an atmosphere of employee involvement and
continuous improvement.
Cellular
manufacturing consists of a series of
product-focused work groups -- cells -- which
house all operations to manufacture a family of
products. The cell is dedicated to manufacturing
those products requiring similar operations. While
a traditional manufacturing environment is
organized functionally with similar machines in one
area (for example, all molding machines in the
Molding Dept.), cellular manufacturing
operates like a series of plants-within-a-plant,
each starting with raw materials and ending with
finished product, with all operations being
performed in the cell.
Machines
in manufacturing cells are located within close
proximity to minimize product transportation (a
form of manufacturing
waste)
and to maintain continuous flow with zero inventory
between operations. The manufacturing cell is
operated by a team of empowered, multiskilled
operators who have complete responsibility for
quality and delivery performance within the
cell.
Guidelines
for Successful Cell Implementation
1.
Make a business case for cellular manufacturing.
Many cellular efforts falter at this first
critical step. It is important to ask why you are
implementing cellular manufacturing. Is it in
response to a competitive threat? Are you losing
market share to competitors with better delivery
performance? Are your customers demanding shorter
lead times than your current operation can deliver?
Are they complaining about missed or late
shipments, poor quality or high costs? These are
legitimate reasons to considering cellular
manufacturing. The fact that someone read about it
in the business press or attended an interesting
seminar is NOT a valid reason, and will likely lead
to failure.
2.
Start with a success. There are two
considerations here. First, identify products (or
product families) where productivity, quality or
delivery improvements are highly visible and can
make a big difference to the organization. To
identify product families, focus on the common set
of operations needed to manufacture the products in
the cell. If an important customer is complaining
about late deliveries on a specific product line,
it might make sense to create a cell around these
products.
Second,
consider a pilot cell in an area where
workers are enthused and excited about
participating in new methods. Worker attitudes can
make or break a cell implementation. Start with the
right people and success will be contagious
throughout the rest of the organization.
3.
Create the cell. Locate all resources,
machines and equipment that will be used by the
cell in a dedicated area in the plant. In some
cases, it will be impossible or impractical to
relocate large, centralized processes, so
alternative arrangements must be made. To the
extent possible, the cell should be self-contained,
meaning that all the operations required to
manufacture the cell's products should be located
together. Minimize the cell's dependence on
resources or operations external to the cell.
Again, the key is to focus on the common set of
operations needed to manufacture the products in
the cell.
4.
Cross-train workers in each of the cell's
operations. One of the hallmarks of cellular
manufacturing is multiskilled operators who can
move freely as needed between work centers within a
cell. Providing training on manufacturing concepts
like lean manufacturing, lead times, process flow,
set-up time reduction, total
productive maintenance
(TPM) and
problem-solving/continuous improvement
methodologies will go a long way toward building a
high-performance manufacturing cell.
5.
Fine-tune the cell's performance. Gradually
reduce batch/lot sizes and set-up/changeover times,
while involving cell members in improving quality
and productivity. Institute a formalized continuous
improvement or kaizen system to make consistent
improvements in cell cost, quality and
delivery.
Cellular
manufacturing, when properly implemented, can
result in huge performance gains for your
operation. Lead time reductions of 50-80%,
quality improvements of 25-50% and product cost
reductions of 10-30% are not uncommon. To see if
cellular manufacturing is right for your
organization, or for assistance with implementation
on the shop floor, give us a call today. We'll work
with your management and operations teams to
restructure your operation for success.
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