Precedence Chart is a math-statistics analysis method, which is used for analyzing the importance of each factor to the target by matrixes chart, and offering basis for management decision-making.

• 优序图法是一种用矩阵图示的办法分析各因素(条件)对目标(项目成败、服务质量)的重要程度,为管理决策提供依据的数理统计分析方法。