Quality characteristic symbolization mapping control chart construction method

The invention discloses a quality characteristic symbolization mapping control chart construction method. The method comprises the following steps of constructing a quality characteristic value symbolization sequence; constructing a quality characteristic influence factor symbolization sequence and establishing a mapping relation; and constructing a quality characteristic symbolization mapping control chart. By using the quality characteristic symbolization mapping control chart construction method, through establishing a mapping relation between a quality characteristic value and an influencefactor, which means that a mapping relation between a quality characteristic data fluctuation rule and an influence factor causing a fluctuation is established, on one hand, the quality characteristic data fluctuation rule can be reflected; on the other hand, a fault source can be discovered in advance through the mapping relation. Therefore, an error caused by man-made subjective judgment, and aquality characteristic in