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Answer: The furthest upstream process that has problems.
A process in manufacturing is a particular method used for producing a product.
A six sigma process is used in processing to produce a product that is 99.99966% of all opportunities to produce some feature of a part are statistically expected to be free of defects.
According to the rules of the six sigma process, when there's a defect, the best thing to do is investigate the furthest upstream process that has problems.
The most upstream process with issues would be a good location to start exploring the cause of the variance.
Chain processes
A manufacturing technique would be a specific procedure for generating a commodity.
Throughout manufacturing, a six sigma process has been utilized just to generate a product throughout which 99.99966 percent among all possibilities to produce certain aspects of a part seem to be likely toward being defect-free.
Thus the response above is correct.
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