06-Average-Std%20Dev%20Charts-BW

# 06-Average-Std%20Dev%20Charts-BW - Average and Standard...

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Average and Standard Deviation Charts UGA FDST 4090/6090 - (c) W.C. Hurst 2010 1 Average ( x ) and Standard Deviation (s) Control Charts FDST 4090/6090 © W.C. Hurst 2010 William C. Hurst FDST 4090/6090 (2010) Conditions for Use 1. 2. FDST 4090/6090 © W.C. Hurst 2010 3. Average-Standard Deviation Chart ( x -S) The Quality Assurance Manager at a DelMonte fresh-cut plant has been asked by management to monitor the filling process for freshly-cored pineapple rings to determine if the weights are FDST 4090/6090 © W.C. Hurst 2010 in or out of statistical control. A technician is instructed to remove 10 consecutive plastic sleeves of cored pineapple off the end of the packaging line once per hour and determine their weights. Is the process in or out of statistical control? • Using the data provided on your worksheet, is the filling process operating in a consistent manner? FDST 4090/6090 © W.C. Hurst 2010 • Calculate and plot the Average ( x ) and Standard Deviation (s) control charts SEE WORKSHEET Calculating Average Control Limits x A Gd s A x UCL 3 + = FDST 4090/6090 © W.C. Hurst 2010

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06-Average-Std%20Dev%20Charts-BW - Average and Standard...

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