Colonel Electric is a large company that produces lightbulbs and other electrical products. One particular lightbulb is supposed to have an average life of about 1,000 hours before it burns out. Periodically the company will test 5 of these and measure the average time before these burn out. The following table gives the results of 10 such samples:
(a) What is the overall average of these means? What is the average range?
(b) What are the upper and lower control limits for a 99.7% control chart for the mean?
(c) Does this process appear to be in control? Explain.
See the attached file.© BrainMass Inc. brainmass.com October 25, 2018, 2:04 am ad1c9bdddf
Attached is a spreadsheet with the control chart. Note the Excel ...
Attached is a spreadsheet with the control chart. This includes the Excel formulas used to implement A2 and calculate the limits.
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(a) Using Excel - Generate and interpret ¯X and R charts for the given data. (i) Which control limits do you believe are most appropriate? Explain. (ii) Does this filing process appear to be in control now? (iii) Does this filing process appear to be in control now?
(b) Are there any other indications that the given process may be out of control now? If so, explain.
(c) What advise would you give to the operators of the filing process based on your analysis of the latest sample information?View Full Posting Details