Concerns are privacy, completeness and accuracy. For instance, word processors, where asynchronous support is to show authorship, track changes and allow to make annotations and synchronous support means to allow users watch changes in real-time and provide additional communication channels like videophones and chat. Useful for collaborative graphic design, publishing or engineering applications. Video is useful when visual information is discussed, otherwise it doesn't give any extra benefit from a normal telephone. The most interesting in the text version of chat is that we can track the conversation, and have backward reference to it anytime.
Features are the equal participation and the anonymity.
The method used for obtaining a design for groupware system has a huge impact on the final result. But the object will be always to identify the user's goals and tasks. Main concerns have to be on one hand not to threaten the users or show favoritism and on the the other hand, to find at which degree the findings can be generalized for other organizations. Most common reasons for failing are the interoperability and the lack of appropriate individual benefit. Some others refer to violations of social protocol, sabotaging group work, abuse of anonymity or violation of privacy.