Design: Design Constraints

Every design problem has a solution space — the set of forms that could satisfy the need. Constraints are not what prevent good design; they are what define the problem precisely enough to be solved. A problem with no constraints has no solution because it has no shape. The designer's task is to understand the constraint set completely: which limits are genuinely fixed, which are preferences that could move, and what territory they collectively leave open.

Christopher Alexander's work on pattern languages makes this explicit: every good design form is a response to a specific set of forces in tension. Understanding those forces — what they require, where they conflict, where they align — is how a designer finds the form that resolves them. Jony Ive's approach at Apple was similar: start with the hardest constraints (manufacturing tolerances, material properties, thermal dissipation) and let design decisions cascade from there. The hardest constraint is often the most generative.

This skill maps the full constraint set, classifies each constraint by hardness, surfaces the interactions between them, and identifies where the productive design space lies within the boundaries they collectively draw.

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