analytic hierarchy;  entropy;  ideal solution;  Sorting;  Multi-target;  fuzzy integer programming;  Preferred

According to the characteristics of this type of problem, it is generalized into "unconstrained scheme queuing problem" and "constrained scheme selection problem", and a approximation ideal solution ranking model and a multi-objective fuzzy integer programming model based on hierarchical analysis and entropy weight are proposed. Case studies show that it is necessary to divide the multi-objective decision-making problem of scheme selection into two steps, and multi-objective quantitative analysis of scheme optimization is the future development direction.