A-Analyze is to determine the cause of the yield of the process is not as specified, which is the cause of Defect (Xs) as a mathematical equation is Y = f (Xs) as it does not meet the targets set in. The Six Sigma is a Defect (Y), so at this stage. Analyzed What factors affect the Defect and to prioritize in order to find the root cause secondary causes (X1, X2, X3, ....)
the need to collect data and processed statistically. Works every step to come and prove it clearly. Not a belief or feeling in the decision as a variety of statistical tools.
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