A comparison of phase I control charts
| Autor: | Coelho, Margarethe, Chakraborti, Subhabrata, Graham, Marien Alet |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: | |
| Zdroj: | South African Journal of Industrial Engineering, Vol 26, Iss 2, Pp 178-190 (2015) |
| Druh dokumentu: | article |
| ISSN: | 1012-277X 2224-7890 |
| DOI: | 10.7166/26-2-1026 |
| Popis: | A carefully done Phase I analysis is a vital part of an overall statistical process control and monitoring regime. Distribution-free control charts can play a useful role in this analysis, as a parametric model assumption often cannot be adequately verified. The performance of two distribution-free charts for the location – the mean-rank and the median chart – are compared in this paper. For benchmarking reasons, the parametric -chart is included in the comparisons. It is seen that the distribution-free charts are in-control robust, whereas the -chart is not, and they both perform similarly to the -chart for normally distributed data. However, for non-normal data, they both outperform the -chart. The results provide evidence in favour of using distribution-free Phase I charts in practice. Concluding remarks and suggestions for future research are given. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|