Dealing with missing values in nuclear safeguards evaluation

Nuclear Safeguards are a set of activities to verify that a State is living up to its international undertakings not to use nuclear programs for nuclear weapons purposes. In the nuclear safeguards evaluation, the experts from International Atomic Energy Agency evaluate and aggregate different indicators to make the final decision. However, some of the expert evaluation values are usually missing. In this study a cumulative belief-degrees based approach is proposed to aggregate the expert evaluations and deal with the missing values. An index is employed to find the reliability of the final result. A numerical example is provided to illustrate the applicability of the methodology.