What’s capability index ?
“Capability index” is a quantitative value to let us know information about a process performance ! It advises us of：
- How stable a process is !
- How capable of meeting specification a process is !
Why do we need capability index
- To have a quick understanding of process performance
- To be able to effectively predict yield, quality level and cost
- To measure the effects of change in the system with greater speed and reliability
- To alter specification limits, it will have the data to back up its decision
Capability index application in SPC