Few questions on DPMO
July 5, 2005 at 8:53 am #39898
1. Which would be more reasonable definition for a defect
a)Product ends up returned in warranty
b)Product doesn’t pass our testsAt first I was told to use b), but then it wouldn’t make any sence as using an extremely slacky testing system would give our products a superior DPMO. The problem with a) is that ppl in marketing tend not to report all the warranty returns.If a), should I exclude errors that are sure to get caught on testing? Again, I can’t see how a good testing system could lower the quality.2. Should components coming from our subcontractors be concidered as a potential error for us?3. Which of these opportunity groups should be grouped as one or excluded? (Never mind if they are CTQ or not)-attaching the screws
-attaching the connectors
-attaching the component
-attaching plates etc.
-placing the wires
-spreading of thermal paste
-checking the quality of soldering done by robots
-general checking (I suppose this has to be excluded as it doesn’t do any increase in value)
-attaching plastic parts
-errors in software loading
-solderingThanks in advance. (And sorry about my terrible english.)0
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