Ppk
From the Half a dozen Sigma quality strategy, procedure overall performance was reported towards the business once the a sigma level. The better the sigma level, the higher the process is doing.
Another way to report process capability and process performance is through the statistical measurements of Cp, Cpk, Pp, and . This article will present definitions, interpretations and calculations for Cpk and though the use of forum quotations. Thanks to everyone below that helped contributed to this excellent reference.
An easy and simple indicator out of process capability
Definitions Cp= Process Capability. Cpk= Process Capability Index. Adjustment of Cp for the effect of non-centered distribution. Pp= Process Performance. A simple and straightforward indicator of process performance. = Process Performance Index. Adjustment of Pp for the effect of non-centered distribution.
Interpreting Cp, Cpk “Cpk is an index (a simple number) which measures how close a process is running to its specification limits, relative to the natural variability of the process. The larger the index, the less likely it is that any item will be outside the specs.” Neil Polhemus
“If you hunt our shoot targets with bow, darts, or gun try this analogy. Continue reading “Process Capability (Cp, Cpk) and you will Techniques Overall performance (Pp, Ppk) – What is the Difference?”