A fuzzy relative ratio method for construction safety management performance evaluation

Abstract

The construction safety management evaluation problem owns many evaluation indexes. Owing to the complexity and uncertainty of evaluation index and the ambiguity of human thinking, the crisp number cannot work well in construction safety management evaluation problem. Interval number can well depict the uncertain and fuzzy information. Thus, for the construction safety management evaluation problem, we construct a multi-attribute group decision making model and use the relative method to solve. Relative ratio method is a practical and useful technique in dealing with multi-attribute decision making problems. Combined with traditional relative ratio method and interval number theory, the article proposes a multi-attribute group decision making model under the condition of uncertain information in the construction safety performance evaluation problem. Firstly, interval number evaluation matrix is applied to describe the uncertain decision information by experts. Secondly, normalization formulas are adopted to construct the normalized interval number decision matrix. Besides, Euclidian distance function is further used in the original relative ratio technique. Finally, an application example shows that the proposed model is reasonable and efficient, and can easily extend to similar decision problems