What is Maintenance?
Why is “Possible Utilization Rate” Necessary?
One way to look at Lean (JIT) production is to compare it to the body’s circulatory system, in
which blood flows to the various organs “just-in-time” to be used. Just as the factory (hospital)
handles large and small parts for its products , so too does the body have its large arteries and
small veins and capillaries.
In Lean (JIT) production, however, any delay in the flow of small parts (in the “veins” of
processing sub-line) soon stops the flow of the large parts (in the “arteries” or main production
line).
To prevent such problems, Lean (JIT) production vitally depends on maintaining a condition of
zero breakdowns. This makes proper maintenance an essential part of (JIT) production. That is
why it is more important to maximize the equipments “possible utilization rate” (the availability of
functioning equipment) than to raise its capacity utilization rate. People need to know the
equipment will be in working order whenever they need it.
The key to achieving zero breakdowns is not maintenance in terms of repairing broken down
equipment, but rather “preventative maintenance” that treats the causes of breakdowns before
the breakdowns actually happen.
What is Maintenance?
Why is “Possible Utilization Rate” Necessary?
One way to look at Lean (JIT) production is to compare it to the body’s circulatory system, in
which blood flows to the various organs “just-in-time” to be used. Just as the factory (hospital)
handles large and small parts for its products , so too does the body have its large arteries and
small veins and capillaries.
In Lean (JIT) production, however, any delay in the flow of small parts (in the “veins” of
processing sub-line) soon stops the flow of the large parts (in the “arteries” or main production
line).
To prevent such problems, Lean (JIT) production vitally depends on maintaining a condition of
zero breakdowns. This makes proper maintenance an essential part of (JIT) production. That is
why it is more important to maximize the equipments “possible utilization rate” (the availability of
functioning equipment) than to raise its capacity utilization rate. People need to know the
equipment will be in working order whenever they need it.
The key to achieving zero breakdowns is not maintenance in terms of repairing broken down
equipment, but rather “preventative maintenance” that treats the causes of breakdowns before
the breakdowns actually happen.
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