可用性评估是以用户为导向的,用户从数字图书馆门户中所获得的体验就是数字图书馆门户可用性评估的对象。用户从门户中得到的体验来源于两个方面:门户界面及门户提供的服务与功能,这两个方面构成了数字图书馆门户可用性评估的具体对象。数字图书馆门户可用性评估指标可从有效性、效率、满意度这三个方面分解,从而形成完整的评估指标体系。 Usability assessment is user-oriented, and the user experience gained from the digital library portal is the subject of assessment of the usability of the digital library portal. The user experience gained from the portal comes from two aspects: the portal interface and the services and functions provided by the portal, both of which form the concrete object of the usability assessment of the digital library portal. The assessment index of usability of digital library portal can be decomposed from three aspects of validity, efficiency and satisfaction so as to form a complete evaluation index system.