Compute the C_pk measure of process capability for the following machine and interpret the findings. What value would you have obtained with the C_p measure?
Upper spec limit = 100 feet
Lower spec limit = 99.5 feet
Process $\mu$ = 99.8 feet
Process $\sigma$ = .08 feet

Question

Compute the C_pk measure of process capability for the following machine and interpret the findings. What value would you have obtained with the C_p measure?
Upper spec limit = 100 feet
Lower spec limit = 99.5 feet
Process

\mu

= 99.8 feet
Process

\sigma

= .08 feet

Quizplus · Accepted Answer

C_pk= 0 .83 so the process is not capable, (C_PK = min [(USL - $\mu$)/3$\sigma$; ($\mu$ - LSL)/3$\sigma$]; [(100-99.8)/3*.08 = 0.833; (99.8 - 99.5)/3*.08= 1.25) C_p= 1.04, implying a capable process (C_P = (USL - LSL)/6$\sigma$ = (100 - 99.5)/(6*.08) = 1.04)

Compute the Cpk Measure of Process Capability for the Following μ\muμ

Compute the C_pk Measure of Process Capability for the Following $\mu$