Three key factors that affect user productivity on database information retrieval are representation realism, expressive ease, and task complexity. Representation realism is the level of abstraction used in formulating queries. Expressive ease is the syntactic flexibility of a query language. Task complexity is the level of difficulty of queries. These factors formed a three dimensional query cube. A laboratory experiment was conducted to evaluate user productivity on database information retrieval corresponding to different vertices of the query cube. The results show that the query cube is a viable framework for assessing user productivity, both on effectiveness and efficiency perspective.
Chan, Hock; Tan, Bernard; Grobler, M.; Miller, Jonathan; Odedra-Straub, Mayuri; and Phahlamohlaka, Jackie, "The Query Cube: A Framework for Assessing User Productivity with Database Information Retrieval" (1994). ICIS 1994 Proceedings. 68.