基于投影缩放方法的多元测量系统能力评价

Measurement system capability analysis is important to quality improvement. The research on capability analysis of measurement system has been extended from a single quality characteristic to multiple characteristics.When the quality characteristics are correlative, Majeske(2008) proposed approval criteria based on volume ratio. However, this method may not appropriate when the measurement error distribution changes with equality volume. In this paper, a new approach based on projection region is proposed. It can reflect the impact of the rotation of measurement error distribution. It is shown that the proposed method outperforms the existing methods. A real-life example and simulative study are given for illustration.