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- Sysiphus is a suite of tools for developing and collaborating over software engineering 	models. In particular, Sysiphus aims at supporting project participants in geographically 	distributed environments.
- In software engineering projects, different models are needed to support the 	activities of different participants. For example, requirements can be written in terms 	of a use case model and nonfunctional requirements. The detailed design of a component 	can be represented in terms of a class model. Models allow participants to reason about 	the system using a simplified abstraction. In any realistic project, however, models 	themselves can become complex and difficult to maintain, as they change and overlap, 	diverting increasingly large project resources towards documentation and model 	maintenance. 	
 Agile projects address this issue by minimizing the size and number of models to 	maintain. Models are used only when needed, as short-term support for collaboration 	or as overview. Otherwise, most design knowledge is either embedded into the source 	code or exchanged among participants directly, for example, during peer reviews or 	frequent demonstrations to the client.
 While agile methods have proven successful dealing with rapid change for single 	site development projects, they do not transfer easily into a geographically 	distributed environment. Not only models are needed to support the transfer knowledge 	between sites, other information, such as justification of decisions, current issues, 	and project status also need to be made explicit.
 Sysiphus provides a unified modeling and collaboration environment aimed at 	addressing the above issues while retaining the essence of agile methods in a 	geographically distributed environment.