Bidirectional projection grey target decision-making model based on three-parameter interval grey number

Mathematical analysis of existing literature to bidirectional projection decision model to grey target is carried out, and the construction defectiveness of closeness degree and consistency coefficient in bidirectional projection is proved. Further, a new bidirectional projection ranking method is presented, which overcomes the shortcomings of the original one. The new method is applied to decision-making under three-parameter interval grey number (TPIGN) background by building an improved bidirectional projection decision model to grey target. Finally, the advantages of the newly built model are confirmed by a numerical example.