(1)A1综合得分=0.25×15+0.15×18+0.2×15+0.15×20+0.15×17+0.1×15=16.5
(2)A2综合得分=0.25×20+0.15×15+0.2×16+0.15×22+0.15×16+0.1×14=17.6
(3)A3综合得分=0.25×17+0.15×16+0.2×14+0.15×15+0.15×16+0.1×15=15.6
(4)A4综合得分=0.25×16+0.15×18+0.2×12+0.15×17+0.15×18+0.1×13=15.7
因此选择A2方案。