Using an improved measure function of vague sets for multicriteria fuzzy decision-making

An improved accuracy function for vague sets is proposed by taking into account the effect of an unknown degree (hesitancy degree) of the vague values on the degree of suitability to which each alternative satisfies the decision-maker’s requirement. The accuracy function is more reasonable than the existing accuracy functions that are not reasonable in some cases. Moreover, the improved decision-making method can improve existing techniques effectively and the process of decision-making needs not to be divided into several steps and needs not adding other rules and choosing parameters when we use the improved decision-making method. The improved method can be used to rank the decision alternative according to the decision criteria. Illustrative examples are given to verify the developed approach and to demonstrate its practicality and effectiveness.