The Performance of Control Charts and Cusums Under Linear Trend
研究了均值逐步变化（线性趋势）条件下，控制图和累积和控制图的运行长度性质，为实际应用中区分渐进变化与阶跃变化提供参考。
The run length properties of Control charts and Cusum schemes, under conditions of slippage in mean level by step‐change to a new sustained level, are well documented. Such control procedures are often used where a genuine “out of control” signal may result from gradual, rather than step, changes. The paper presents the results of evaluation of run length under linear trend for some well‐known procedures.