Hey Everybody

I know you get seven different types of capability indices, now does any one know what they are and except for the most common ones used in industry like Cp, Cpk, Ppk and Pk.





Quote: Quality Is A Way Of Life

[QUOTE=Angusk;195489]Hey Everybody

I know you get seven different types of capability indices, now does any one know what they are and except for the most common ones used in industry like Cp, Cpk, Ppk and Pk.

Welcome to the cove.

Have a look at this :
http://www.qualityadvisor.com/sqc/capability_indices.php

They are explaning 4 capability indices and 3 performance indices.

Hope this helps ( if not, please come again )

Best regards,

Antoine

:agree1: Thanks, alot because I was becoming a bit confused as I had a discussion with one of my collegues and he mentioned that there are 7 capability indices but you are right the 3 are for performance and the 4 are for capability. :thanx:





Quote: :blowup:Quality is a Way Of Life:blowup:

If you want a vast amount of information on a much larger variety of process capability measurements, I recommend "Measuring Process Capability" by Davis Bothe (ISBN 0-07-006652-3). The only caveat is that I do not agree with his presentation on tool wear in chapter 13. Other than that, quite a book.

Having 7 indices that you can calculate is one thing. More complicated is what they mean, when are they valid, when to use which one and how to improve the index.

K.