When looking at a chain of processes with a low yield (high defective rate), what is a good place to start investigating the source of variation?

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Francis Quinn

Engineering

2 September, 15:09

When looking at a chain of processes with a low yield (high defective rate), what is a good place to start investigating the source of variation?

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Maryjane Barrera · Answer 1

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.