Is the company delivering six-sigma quality to its


Ebay promises to ship all customers orders within 34 to 82 hours of receiving the order at its web site. Actual shipment data for all computers shipped during the past month showed that the average shipment time was 60 hours, and the standard deviation was 8 hours.

a. Is the company delivering Six-Sigma quality to its customers?

b. If not, then how much should the standard deviation of the process be reduced to get Six Sigma quality?

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Operation Management: Is the company delivering six-sigma quality to its
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