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将灰色系统理论中的预测与关联度理论引入产品质量控制领域，建立了产品合格率产品质量突变区间的ＧＭ预测模型以及产品质量影响因素的关联度诊断分析模型，提出了ＧＭＰｔＣ图，并给出了一个应用案例，为产品质量的预报控制与因素诊断提供了有效分析方法与工具
The theory of forecasting and relevance in gray system theory is introduced into the field of product quality control. The GM prediction model of the product quality product mutation interval and the diagnostic analysis model of the product quality influencing factors are established, and the GMPtC map is given. An application case provides an effective analytical method and tool for forecasting control and factor diagnosis of product quality