Context-Aware Systems: The 'Right' Information, at the 'Right' Time, in the 'Right' Place, in the 'Right' Way, to the 'Right' Person

Based on the assumption that the scarce resource for many people in the world today is not information but human attention, the challenge for future human-centered computer systems is not to deliver more information "to anyone, at anytime, and from anywhere," but to provide " the 'right' information, at the 'right' time, in the 'right' place, in the 'right' way, to the 'right' person." This article develops a multidimensional framework for context-aware systems to address this challenge, transcending existing frameworks that limited their concerns to particular aspects of context-awareness and paid little attention to potential pitfalls. The framework is based on insights derived from the development and assessment of a variety of different systems that we have developed over the last twenty years to explore different dimensions of context awareness. Specific challenges, guidelines, and design trade-offs (promises and pitfalls) are derived from the framework for designing the next generation of context-aware systems. These systems will support advanced interactions for assisting humans (individuals and groups) to become more knowledgeable, more productive, and more creative by emphasizing context awareness as a fundamental design requirement.