A FRAMEWORK—INFORMED DISCUSSION ON SOCIAL SOFTWARE - Why Some Social Software Fail and Others do Not? Topics: Design Methodology and Cognitive Factors in Design; Functional and Non-Functional Requirements; Human Factors; Internet HCI: Web Interfaces and Usability; User Needs In Proceedings of the 12th International Conference on Enterprise Information Systems - Volume 1: ICEIS, 149-154, 2010 , Funchal, Madeira, Portugal