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Wu, Zhang - In: International Journal of Quality & Reliability Management 12 (1995) 1, pp. 53-60

classifications), each of which is characterized by the shift magnitude (δ) and the occurrence probability, f. The knowledge relating … to the shift modes is useful to the improvement of the effectiveness of the control charts and to the reduction of the …

Persistent link: https://www.econbiz.de/10014800974

Process Goal Charts for Quality Improvement Programmes

White, Edna M.; Kaighobadi, Mehdi; Wharton, T.J. - In: International Journal of Quality & Reliability Management 11 (1994) 2, pp. 26-40

Total quality management programmes emphasizing continuous improvement have become increasingly popular as companies … perceive the importance of quality in maintaining or enhancing their competitive position. Although improvement programmes are … extremely valuable, they do not eliminate the eed for control. Unfortunately, companies striving for quality improvement may de …

Persistent link: https://www.econbiz.de/10014800926

There’s nothing normal about SPC!

Neave, Henry R. - In: Training for Quality 5 (1997) 3, pp. 106-111

arguments as to why the “orthodox” statistician claims that normality is necessary. One is to enable probability interpretations …. The truth is that, even under normality, the usual probability interpretations are meaningless in practice and that, in … very similar over a wide range of differently‐shaped probability distributions. …

Persistent link: https://www.econbiz.de/10015028383

Control charts for monitoring observations from a truncated normal distribution

Cox, M.A.A. - In: The Journal of Risk Finance 10 (2009) 3, pp. 288-304

Purpose – The majority of quality control charts are employed for normally distributed data. In reality this assumption is not always valid. This paper aims to consider an alternative the truncated normal. Design/methodology/approach – Having derived integral equations for the average run...

Persistent link: https://www.econbiz.de/10014901507

Average run lengths of control charts for monitoring observations from a Burr distribution

Cox, M.A.A. - In: The Journal of Risk Finance 11 (2010) 5, pp. 508-514

Purpose – The majority of quality control charts are employed for normally distributed data. In reality this assumption is not always valid, as an alternative the Burr distribution is considered here. Design/methodology/approach – Having previously derived integral equations for the average...

Persistent link: https://www.econbiz.de/10014901558

Improving the application of quality conformance tools in service firms

Jensen, John B.; Markland, Robert E. - In: Journal of Services Marketing 10 (1996) 1, pp. 35-55

Explains that, as global competition changes the expanding service sector, quality will play an increasingly pivotal role in both attracting and retaining service customers. Reveals that research into service quality has addressed two important dimensions: promoting quality through the design of...

Persistent link: https://www.econbiz.de/10014905569

Average run lengths of control charts for monitoring observations from a Burr distribution

Cox, M.A.A. - In: Journal of Risk Finance 11 (2010) November, pp. 508-514

Persistent link: https://www.econbiz.de/10010815060

A comparison study of effectiveness and robustness of control charts for monitoring process mean

Ou, Yanjing; Wu, Zhang; Tsung, Fugee - In: International Journal of Production Economics 135 (2012) 1, pp. 479-490

variable, including the most effective optimal and adaptive Sequential Probability Ratio Test (SPRT) charts. The nine charts … effectiveness of the charts, but also investigate their robustness in performance. Moreover, the probability distribution of the …

Persistent link: https://www.econbiz.de/10011043228

Control charts for measurement error models

Golosnoy, Vasyl; Hildebrandt, Benno; Köhler, Steffen; … - In: AStA Advances in Statistical Analysis 107 (2022) 4, pp. 693-712

We consider a linear measurement error model (MEM) with AR(1) process in the state equation which is widely used in applied research. This MEM could be equivalently re-written as ARMA(1,1) process, where the MA(1) parameter is related to the variance of measurement errors. As the MA(1) parameter...

Persistent link: https://www.econbiz.de/10015165616

Measuring processes for profit

Cartwright, Graham; Hogg, Bill - In: The TQM Magazine 8 (1996) 1, pp. 26-30

successfully by teams, vastly reduces the time to solve problems. In practice, showing over 30 per cent improvement in performance …

Persistent link: https://www.econbiz.de/10015033451