ABSTRACT
In architectural study, diagrams are ubiquitous. They are also frequently idiosyncratic. At first glance, there appear to be few generalized conventions with which to read and to generate diagrams. Categorizing the diagram as a subset of the model clarifies its principal role: analysis, during or after the design process. A diagram attempts to understand something by selectively defining and isolating specific components. Abstraction always accompanies representation. A duplicate may be a representation, but not all representations are duplicates, just as a square is a rectangle, but not all rectangles are squares. Design is a thoughtful enterprise. It is also a precursor to construction or manufacture. Because it is impossible to act responsibly without forethought, learning to design is also learning how to devise a plan of the action. When learning to design well, it is imperative to plan before acting.
