PART
V.
Reliability
The
reliability
measurements
assess the engineering design process,
supplier delivery and capability of the equipment used in the manufacturing
process.
1.
Percent increase of process capable equipment
The
first step must be to establish that the equipment is
statistically in control, then measure process capability. The
measure is percent of machines or processes at CP = 2.0.
CP is the specifications width (tolerance) divided by the
process spread ( + /-3 stigma). Measure number of machines in the
department divided by the number of machines
capable of meeting this standard.
2.
Percent increase in overall equipment effectiveness
Machine
effectiveness is availability
(hours running divided
by scheduled run hours) times performance (actual machine cycle or
rate divided by theoretical machine cycle or
rate) times rate of quality
product (good
material divided by
total material run).
3.
Percent reduction in warranty costs
Measure
and track monthly by product line
in dollars as percent
of sales and as percent of operating cost. Utilize trend
charts.
4.
Percent reduction in engineering changes
Measure
by comparing a series of new products released to
Manufacturing. The measure is for right first time or quality
of release. Depending upon the frequency of new product
introduction, the measurement can be monthly by product
line
on a trend line.
5.
Percent increase in on-time delivery
Measurement
shows whether the product was shipped to the
customer in the time promised. Actual measurement is orders
shipped on time divided by total orders shipped.
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