A system for creating and viewing simulation models that are used for managing requirements and design specifications for complex systems. Users simultaneously collaborate on the description of a complex system such as an enterprise software project throughout its life cycle. User interfaces, designed to assist in the visualization of a particular form of knowledge, allow users to describe the complex system with simple interactive elements. Information in all perspectives is presented so that it is legible and discernable to a non-technical audience. Multi-dimensional data structures record all the resulting information, creating a simulation model of the complex system, and the tasks required for construction and maintenance. Tasks are driven from the specifications not as a separate activity, but as part of the same activity to facilitate project management by allowing decisions to be tracked virtually throughout the simulation model.