<Tr> <Th> Index </Th> <Th> Description </Th> </Tr> <Tr> <Td> C ^ p = U S L − L S L 6 σ ^ (\ displaystyle (\ hat (C)) _ (p) = (\ frac (USL - LSL) (6 (\ hat (\ sigma))))) </Td> <Td> Estimates what the process is capable of producing if the process mean were to be centered between the specification limits . Assumes process output is approximately normally distributed . </Td> </Tr> <Tr> <Td> C ^ p, l o w e r = μ ^ − L S L 3 σ ^ (\ displaystyle (\ hat (C)) _ (p, lower) = ((\ hat (\ mu)) - LSL \ over 3 (\ hat (\ sigma)))) </Td> <Td> Estimates process capability for specifications that consist of a lower limit only (for example, strength). Assumes process output is approximately normally distributed . </Td> </Tr> <Tr> <Td> C ^ p, u p p e r = U S L − μ ^ 3 σ ^ (\ displaystyle (\ hat (C)) _ (p, upper) = (USL - (\ hat (\ mu)) \ over 3 (\ hat (\ sigma)))) </Td> <Td> Estimates process capability for specifications that consist of an upper limit only (for example, concentration). Assumes process output is approximately normally distributed . </Td> </Tr>

What is the meaning of cp and cpk