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| Tekijä: | Quesenberry, C. P. |
| Otsikko: | Geometric Q-charts for high quality processes (statistische Methode) |
| Lehti: | Journal of Quality Technology
1995 : OCT, VOL. 27:4, p. 304-315 |
| Asiasana: | |
| Vapaa asiasana: | STATISTISCHE QUALITÄTSKONTROLLE, ELEKTRONISCHE INDUSTRIE |
| Kieli: | eng |
| Tiivistelmä: | The p-chart based on the binomial distribution is not useful for many processes when p is small even when p is known, because the sample size required is very large. There are practical problems in areas such as electronics manufacturing and medical supplies sterilization where p can be 0,01 or smaller. Any type of binomial chart will be inadequate for these applications, and another form of process control is required. This paper introduces Q-statistics based on the geometric distribution, which can be used for such high quality processes. In fact, smaller values of p give more precise charting methods. |
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