用控制圖分析交通死亡人數(shù)的實(shí)例
[Abstract]:Since its invention in 1920s, the positive control chart has been widely used in production process control. In advanced countries, control charts are also increasingly being used in services. According to the ISO9000 quality system Standard Family, "all work is done through the process". Application of control chart to analyze, control and improve the service process, is also the meaning of the problem. Some experts in the United States simply call control charts "process behavior diagrams." The Tennessee newspaper, according to data from the security services, published "the death toll from traffic has plummeted for three years in a row." In the headlines. But Mr. Wheeler, an international statistician and columnist for quality magazine, makes his own analysis and questions based on the number of traffic deaths in the news for the past 25 years (see table 1). "does the data represent any material change in highway safety?" Wheeler's approach is to "put the data on the process behavior diagram (control chart)." this
【作者單位】: 上海思科統(tǒng)計(jì)質(zhì)量咨詢服務(wù)有限公司
【分類號(hào)】:D631.5
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