The metal body for a spark plug is made by a combination of cold extrusion and machining. The occurrence of...

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The metal body for a spark plug is made by a combination of cold extrusion and machining. The occurrence of surface cracking following the extrusion process has been shown by Pareto diagrams to be responsible for producing virtually all of the defective parts. To identify opportunities for improvement, you have been using a control chart to monitor the process.  The probability of a false alarm is 0.0056

 

    • 11 years ago
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