Before a single line gets drawn in schematic design, architects translate the building program into diagrams that make spatial relationships, area allocations, and functional zones visible. These graphics are your primary tool for confirming the program is right before committing to a floor plan.

Area proportion diagrams show how much of the building each department or function occupies. Functional zone diagrams map where public and private, served and service, or departmental areas sit relative to each other. Relationship graphics like adjacency matrices and bubble diagrams capture which spaces must be adjacent, which should be separated, and which share critical functional connections.

On the PA exam, Objective 4.7 tests your ability to analyze and evaluate these diagrams. You won't just be identifying what a stacking diagram is. You'll be asked to look at a diagram and determine whether the spatial allocations match the program, whether functional zones are organized correctly, or whether a proposed arrangement violates adjacency requirements.

The cognitive level is A/E, so expect to weigh competing factors. A diagram might show adequate area proportions but poor functional zoning. You'll need to evaluate which issue matters more given the project context, and decide whether the graphic accurately communicates the program intent.