Kind folks,
Before I go off in the frozen tundra in my current MI location, to finish my
book, I need some input on the following:
Process control is defined as using process capabilities
in an efficient, effective, consistent manner. To say a process is
in control means the process is operating without assignable cause.
If assignable cause is found, the process is out of control, and
must be corrected, redesigned, and re-characterized. If a process is
found to be in control it does not mean it is capable of meeting
product acceptance specifications. It simply means it is consistent ? good
or bad.
Process capabilities charts (Cpk) describe the relationship between process
control and product quality. When process capabilities are statistically
proven to provide specified product quality, they are capable of providing
product meeting customer/contract requirements.
The above factors should be considered at the design concept level. Then,
DFM/CE has a firm footing so a concept may be turned into a design capable
of being manufactured as a product meeting specified customer contract
requirements.
Just a bit wordy, as usual, but do these words have validity in today?s
?just do it? world. I mean, does what Juran, and others, have been preaching
so long, have meaning for us in light of some of the previous discussions
concerning quality systems, ISO, too much restraint, not enough creative
freedom, and all the rest?
MoonMan
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