General Definitions for traditional Process Capability Indexes

– Cp: inherent process capability
– k: position of process in relation to specification mean
– Cpk: position of a 6sigma process in relation to specification mean
– Cpl: position of of 6sigma process in relation to lower specification limit
– Cpu: position of 6sigma process in relation to upper specification limit
– Cpm: position of mean to target in relation to specification limits