Dear All,

1. I want to now the exact difference between the Cp and Cpk?

2. What is the meaning of Machine capability and how it is differ with Process capability ?

Thanks,
Ashish

Ashish,

1) Due to space and time limitations I am not explaining the difference in details here.

Just type in "Difference between the Cp and Cpk? " in Google search and you will get reference to over 70,000 links.  

You need to read info in 15 - 20 links in order to correctly understand the fundamental difference between Cp and Cpk.

Pl. see http://elsmar.com/Cp_vs_Cpk.html for a very good visual animation of Cp & Cpk.

2) I am not very clear as to what do you mean by " Machine Capability " ? Do you  mean " Machine Specification " ?  Different machines ( e.g. Electric motors , Pumps , Compressors, Petrol & Diesel Engines , Lathe , CNC machine etc.) are specified in different ways. The term Process capability in very simple terms (i.e. without mathematical jargons ) means what your Process can deliver. For example to produce 200 machined parts /day we may have to carry out different operations on 4 or 5 machines. Dimensions of final product will be measured and compared with the part drawing / specs . Parts whose dimensions do not conform to drawing will be rejected.

Hope with above explanation you will not mix and confuse " Machine specifications " with Process capability.  

Thanks

Aniruddha