I need some information on how to set up a statistical approach @ six sigma in a PCBA manufacturing. Example using Process data in term of CPK,Cp,Ppk and drive the sigma narrower @ FROM one sigma to six sigma.

I need some information on how to set up a statistical approach @ six sigma in a PCBA manufacturing. Example using Process data in term of CPK,Cp,Ppk and drive the sigma narrower @ FROM one sigma to six sigma.