Process Capability Index (CPK) in i3070
应用文章
What is CPK?
A common question In-circuit Test(ICT) engineer will ask is: “The test is passing, though, how good is the test?”. In ICT, and in Keysight i3070 specifically, the CPK is viewed as a tool to assist the users in evaluate the stability of the test and meeting their quality goals.
Process capability index (CPK) is a statistical tool, to measure the ability of a process to produce output within customer’s specification limits. In simple words, it measures producer’s capability to produce a product within customer’s tolerance range. CPK is used to estimate how close you are to a given target and how consistent you are to around your average performance. CPK gives you the best-case scenario for the existing process. It can also estimate future process performance, assuming performance is consistent over time.