Situation Karen and Bryan both work for a company that makes computer components. Karen works in the quality assurance department and Bryan is a shift supervisor in production. At a recent meeting the new production manager, Alex, requested that Bryan and Karen analyze the process capability of the production lines. Bryan has some background in using process behavior charts at another company. Karen has had several college courses in statistics. Both Karen and Bryan take data from Production Line 5, analyze the process capability, and send a report to Alex. Alex is confused because Karen and Bryan got different results for the process capability and calls a meeting to discuss the results. Karen says that the process is not capable of meeting specifications while Bryan says that the process has a hypothetical capability that would put the process well within specifications. Available data Both Karen and Bryan used the following data to determine the process capability for Production Line 5. Questions 1. Bryan analyzed the capability of Production Line 5 using SPC software. Analyze the data using SPC techniques to determine the capability for Production Line 5. 2. Karen used the average and standard deviation functions in a spreadsheet program to analyze the data. What do you get for process capability for Production Line 5 using these functions? 3. What is the difference between Bryan’s analysis and Karen’s analysis? Which one is the correct one for Alex to use?
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