Systems analysis provides a fast, simple, and flexible way for a mechanical design engineer to define all the main components and a set of relationships that comprise a mechanical HVAC system, without having to physically model any part of it.
Use sketch mode to define which parts of the building are served by zone equipment, air systems, and water loops. Organize the model data in a way that maps to how systems work in reality, how engineers think, and how design happens, taking into account rapid change and the need to work at different levels of detail or completeness.