This study presents a novel approach for assessing and prioritising relative weights of the factors in order to reveal the level of each factors' contribution to the usability index system in the context of library websites. The inputs of experts in the related field were used to probe weights of seven key dimensions and 20 measuring items of library website usability. These factors covering both dimensions and measuring items were identified and validated from the authors' previous study. The study employed fuzzy theories along with the extent analysis fuzzy analytic hierarchy process (FAHP) ...
