(基于Paul Pallady的案文)
FMEA的主动方法基于面积图, 严格基于严重程度和发生次数(主动评级量表),这些因素构成了图形的坐标,为故障模式及其影响分配了字母数字代码。此图表具有三个不同的区域:低优先级区域,中优先级区域和高优先级区域。高优先级区域中绘制的故障模式被认为是最重要的因此,基于故障模式在图中的位置定义的故障模式的重要性很重要。
在这种情况下,组织承认必须将导致严重性为9或更高的所有影响都指定为控制特征,以十个发生点规模作为终点,从而将区域置于优先位置。. 接下来,团队定义中等优先级区域位于从严重性等级的第四级到命中等级的第五级的一行上。因此,要强调的是,要研究的前两个故障模式将是B和C。
图19-面积图显示了根据严重程度和发生次数值获得的刻度。
图19-面积图
资料来源:Paul Palady,《 FMEA失效模式和影响分析:在问题发生之前进行预防》,1997年,第1页。 133
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