C&A’s potato chip filling process has a lower specification limit of 9.5 oz. and an upper specification limit of 10.5 oz. The standard deviation is 0.3 oz. and the mean is 10 oz. What is the process capability index for the chip filling process? O 0.33 O 0.56 1.11 3.33
Expert Answer
Following formulas will be used:
Cpl = (Mean – LSL)/3*SD
Cpu = (USL – Mean)/3*SD
Cpk= Min (Cpl, Cpu)
Cpl = (10-9.5)/3*0.3 = 0.5/0.9 = 0.56
Cpu = (10.5-10)0.9 = 0.56
Cpk= 0.56