Preliminary Experiments on a Model to Relate Cpk and SNR Indices
Leo D. Kounis, J. M. O'Sullivan, Ian R. McAndrew · Scholarly Commons (Embry–Riddle Aeronautical University) · 1999
This paper investigates the difficulties of using both Signal-to-Noise Ratios (SNR) and Capability Indices (Cpk) as quality improvement techniques. Recognising the possible contradictory indications of the indices, Cpk and SNR as process quality measures, a 2D geometrical construction is described which relates these indicators. The model has previously been demonstrated theoretically to be capable of clearly indicating the contradictions between indicators. Essentially, it is able to balance the requirements of robustness and reduction of rejects.