How to Calculate CPK With Excel

1. Launch Microsoft Excel and type “Data” in A1, “Upper Limit” in B1, “Average” in C1, “StDev” in D1, and “Cpk” in E1.
2. Type “1” in A2, “2” in A3, “3” in A4, “4” in A5, “5” in A6, “6” in A7, “7” in A8, “8” in A9, “9” in A10, and “10” in A11. Type “15” in B2.
3. Add the following formula in C2 to calculate the average for the data:=AVERAGE(A2:A11)
4. Add the following formula in D2 to calculate the standard deviation for the data:=STDEV(A2:A11)
5. Calculate CPK using the upper limit, average, and standard deviation values by adding the following formula in E2:=((B2-C2)/(3*D2))