Group decision comprehensive evaluation algorithm based on improved voting protocols

Comprehensive evaluation problem for decision objects is studied in group decision support systems (GDSS). Based on an analysis of limitations of existing methods, a new approach based on improved Bora voting protocol is proposed, by which the agent can get his preference elicitation. Opinions of decision-maker are collected in a simple way. The qualitative evaluation is translated to a quantitative grade and the constructive coalitional manipulation is avoided. It provides an effective comprehensive evaluation algorithm for scoring and ranking involving multi-user and multi-factors in the GDSS by qualitative evaluation and overcomes the drawbacks of existing systems.