To develop an understanding of dependability issues as they apply to ubiquitous computing in a home setting.  The objectives are:  1. To develop concepts and methods for dependability specification and design for ubiquitous computing in the electronic home of the future.  2. To meet these aims the assistive technologies currently being used to allow people with specific disabilities in their own homes will be taken as a driver application. A secondary aim is thus to improve the dependability of these assistive home technologies. 3. The objectives will be achieved using a combination of field studies and analytical methods. 
