Abstract
The construction of mature products considering needs of end-users leads to several challenges. Especially if various experts are involved in the evaluation of prototypes being built towards a final product, an efficient support becomes crucial. In this contribution we address how such a process could be efficiently performed by means of DUI technology. We address this primarily for our case studies concerned with evaluating privacy and its usability in collaborative settings. The main idea thereby focuses on the involvement of end-users and respective usability and security experts in co-located or distributed settings. We analyze two case studies (i.e. end-user driven cloud deployment and SocialTV) and discuss our findings. The chosen case studies reflect the advantage of two-sided DUI's for collaboration support, namely, how to collaboratively evaluate usability of security and privacy measures in prototypes, which in their turn could have a collaborative nature.