426 2013 eng conferenceobject 0 2013-03-21 -- -- In this paper we present a methodological framework for usefulness evaluation of digital libraries and information services that has been tested successfully in two case studies before developing a corresponding tool that may be used for further investigations. The tool is based on a combination of a knowledge base with exploitable and modifiable questions and an open source tool for online-questionnaires. urn:nbn:de:kobv:525-4266 Vortrag gehalten auf dem International Symposium of Information Science (ISI) 2013 René Schneider Jasmin Hügi deu swd Wissensbasis deu swd Informationsdienst deu swd Bewertung deu swd Online-Befragung deu swd Nutzen deu swd Nutzenvergleich deu swd Informationsbedarf deu swd Elektronische Bibliothek Bibliotheks- und Informationswissenschaften Extern ISI 2013, Einzelbeiträge Fachhochschule Potsdam https://opus4.kobv.de/opus4-fhpotsdam/files/426/ISI'13_supplement-frei.pdf