Process Capability 2a. A cable manufacturer produces micro USB cables. The size of the connector is allowed to vary between 4.998mm and 5.003mm. The process is currently running with a standard deviation () of 0.001mm. What is the value of CP for this process? CP = (USL - LSL)/6) 2b. A food producer is bottling vinegar. The amount of acid in this vinegar is allowed to be between 12mg 1mg. Currently the process is running with a standard deviation () of 1mg. What is the CP for this process? 2c. The LSL is given by 15mm for a process, the USL is 20mm. The standard deviation () is 1mm. The process is centered () at 17mm. What is the CPK? CPK = min { (USL - )/3 ; ( - LSL)/3) } 2d. For a given process the CP value is 1.00 but the CPK value is 0.5 What do we know about this process? 2/2 Hint: remember, CP only measures the variability of the process (the spread compared to the distance allowed between USL and LSL, but CPK measures the centering of the process.

Select One:

e: a. The process is in control. b. The variability in the process is more than the distance between the upper and lower specification limits. c. The process is not centered. d. There is an error because the CPK value cannot be less than CP.