Calculation of Standard deviation, Cp & Cpk in SPC
Foe below result achieved see calculation of how Mean Value, Standard deviation, Cp & Cpk is calculated in standard SAP
See below result of Mean Value, Standard deviation, Cp & Cpk is calculated in standard SAP
From above screen I have taken below reading
1. Calculation of Mean value
So Mean Value, = (Sum of Recorded Result) / No. of Record
Mean Value = 38.667
The mean (38.667) is closer to one of them than to the other, leading to a Cpk factor (0.17) that is lower than the Cp value (0.22). This implies that the LSL is more difficult to achieve than the USL. Non-conformities exist at both ends of the histogram.