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首页> 外文期刊>Journal of applied statistics >The RL_2 Chart versus the np Chart for Detecting Upward Shifts in Fraction Defective
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The RL_2 Chart versus the np Chart for Detecting Upward Shifts in Fraction Defective

机译：RL_2图表与np图表用于检测分数缺陷中的上移

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摘要

The use of the np chart for monitoring fraction-defective is well-established, but there are a number of relatively simple alternatives based on run-lengths of conforming items. Here, the RL_2 chart, based on the moving sum of two successive conforming run-lengths, is investigated in order to provide SPC practitioners with clear-cut guidance on the comparative performance of these competing charts. Both sampling inspection and 100% inspection are considered here, and it is shown that the RL_2 chart can often be considerably more efficient than the np chart, but the comparative performance depends on the false-alarm rate used for the comparison. Graphs to aid parameter-choice for the RL_2 chart are also provided.
机译：很好地使用np图来监视缺陷分数，但是基于合格项目的运行长度，存在许多相对简单的替代方法。在此，基于两个连续的一致游程长度的移动总和，对RL_2图进行了研究，以便为SPC从业者提供有关这些竞争图的比较性能的清晰指南。这里同时考虑了抽样检查和100％检查，结果表明RL_2图通常比np图更有效，但是比较性能取决于用于比较的错误警报率。还提供了有助于RL_2图表选择参数的图表。

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