Research on uncertainty translated into certainty based on SPA theory

Voting is commonly used to decision making in many large projects. Compared to “Agree” and “Disagree” which are two types of certainty information, “Abstention” belongs to the uncertainty factor. However, the high proportion of abstentions will largely affect the normal decision-making. Based on the theory of Set Pair Analysis (SPA) and relevant literature, Proportional Analysis Method (PAM) is used to take such uncertain composition of “Abstention” gradually to differentiate into “Agree” and “Disagree”. Thus the uncertainty issue is translated into the certainty one in theory. At last, an example is proposed to illustrate the application of the model about the uncertainty issue translated, and confirms its rationality.