The search for an online product that matches e-shoppers’ needs and preferences can be frustrating andtime-consuming. Browsing large lists arranged in tree-like structures demands focused attention from eshoppers.Keyword search often results in either too many useless items (low precision) or...

This paper presents the way that the global efficiencies approach has been applied to improve the dynamic reasoning of an intelligent Graphical User Interface (GUI) that is based on the Data Envelopment Analysis (DEA). The GUI provides intelligent help to users during their interaction with an...