Usability is a major concern within adaptive user interfaces. It presents a combination of different attributes. The impact of each usability attribute may vary from one layer to another during the usability evaluation of adaptive user interfaces. On that basis, one question that arises is: "What are the priority levels of usability criteria that need to be assessed in individual layers and in the whole adaptive system?" This paper presents possible directions to address this question by identifying the priority level of usability criteria to be assessed in the adaptive user interfaces of information systems, considering the ISO/IEC 25040 standard. The priority level is calculated using a multi-criteria decision analysis method, namely the Analytic Hierarchy Process. The proposed approach provides guidance for evaluators to better evaluate adaptive user interfaces. An adaptive information system in the field of transport is presented in order to validate and illustrate our approach.
RESUME. L'utilisabilité est un facteur de qualité important pour les interfaces utilisateur adaptatives. Il se focalise sur une combinaison des attributs. Le niveau d'importance de chaque critère peut varier d'une étape d'adaptation à une autre lors de l'évaluation de l'utilisabilité des interfaces utilisateur adaptatives. Une question qui se pose est : « Quel est le niveau de priorité des critères d'utilisabilité qui doivent être évalués dans les différentes étapes d'adaptation et dans l'ensemble du système adaptatif ?». Dans cet article, nous identifions les critèresd'utilisabilité qui doivent être évalués dans les interfaces utilisateur adaptatives des systèmes d'information, en se basant sur la norme ISO/IEC 25040. Le niveau de priorité est déterminé à l'aide d'une méthode multicritères d'aide à la décision, à savoir le processus d'analyse hiérarchique. L'approche proposée sert à guider les évaluateurs pour mieux évaluer les interfaces utilisateur adaptatives. Un système d'information adaptatif dans le domaine du transport est étudié afin de valider l'approche proposée.
Choosing the appropriate usability evaluation methods is a key part of the usability evaluation process of interactive adaptive systems. This step needs the consideration of different factors, leading to a multi-criteria decision analysis problem. In this paper, we present a review of the main factors reported in the literature which can affect the selection of usability evaluation methods for interactive adaptive systems. Three of the most commonly used usability evaluation methods are selected and classified according to these factors. The results of this research are used by applying a decision aid method in order to guide the choice of suitable usability evaluation methods for a given adaptive system in the field of tourism.
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