Abstract
Collaboration between designers and software engineers is a key issue in the development of mobile applications.This research holds workshops using prototypes in order for the software development. There are 4 purposes for that; (1) the verification of designs by the designers, the software engineers and the users as well as the discovery of possibilities for new design, (2) obtaining a common language for the designers and the software engineers to collaborate, (3) the education of new members and (4) User Experience Design, which has been added this time. In this report, (4) the effectiveness of the workshops for User Experience Design of mobile applications will be described.