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A manufacturer of electronic switches wishes to use statistical process control to monitor production. One measurement...

A manufacturer of electronic switches wishes to use statistical process control to monitor production. One measurement on the switches is required to have a mean value 12mA with standard deviation of 1.5mA, and the company intends to use samples of six switches. What will the upper and lower control limits for the x-bar chart?

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Answer #1

ar{x} chart :

Lower Control Limit (LCL) = ar{ar{X}} - 3sigmaar{x}

Upper Control Limit ( UCL) = ar{ar{X}} +3 sigmaar{x}

calculations given below.

Giveo 12, 1.5 o 6124 chot = 2-1, 8311 Opper on 2 + (3x0-G124) = 3.8311 ~ 3.84

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