Note on consistency ratio

Since Saaty presented his famous research on the analytic hierarchy process, many followers have tried to extend the knowledge of this new and growing branch of operation research. At this same time, some opponents have raised several questions to improve this novel category. Among them, they question why the consistency ratios should be ≤ 0.1. In this note, we study Apostolou and Hassellʹs paper to show that their results cannot shake the validation of the consistency ratios being ≤ 0.1.