The Pattern of Utilisation of Digital Collection and its Level of Usability in Electronic Repository at University Library of UII (Universitas Islam Indonesia)

Nowadays the development of digital-based library has attracted much attention and become a leading program of library services that are quite effective and efficient. However, the presence of digital library services in the form of institutional repository is actually a special challenge for libraries. Not only providing such services, but the library also needs to know how about to what extent the utilization of the services for users, and whether or not the services work as expected in the way to increase performance. This is the purpose of this study, which is to determine the utilization of electronic repository services and the level of usability at university library of UII Yogyakarta. The method used in this research is descriptive quantitative using a sampling technique of slovin formula with the margin of error by 10%. There are 98 respondents used as samples from 6.000 members of the research population. Those respondents were given a number of questions through a questionnaire that has been prepared based on several indicators for utilization of digital collection and its usability level at electronic repository. Based on the results of analysis, it can be concluded that the level of usability of UII library e-repository reaches good categories in most indicators, including usefulness, relevancy, efficiency, reliability, and accuracy in which those are in the value percentage, between 65 - < 85. Meanwhile, the effectiveness, learnability, and satisfaction indicators only get scores between 45 - < 65 meaning in the level of satisfactory. The same what happens in the utilization rate of digital collections by which the three indicators, i.e. the intensity, frequency, and diversity uses also get the level of satisfactory as can be seen in the results of the percentage between 45 - < 65. This level can be concluded that the utilization of digital collection through UII library e-repository is still low. Keyword: digital library, institutional repository, utilization of collection, usabilit