Design Constraint

A design constraint is a specific, concrete requirement a design must meet to be considered a viable solution to the design problem. Constraints are distinct from preferences — a constraint is binding (violating it means the design is not a solution), while a preference is adjustable. Constraints are typically derived from the real conditions under which the design will operate: time limits, context requirements, non-negotiable features, prohibited approaches, accessibility requirements, budget ceilings. In Design Challenge and in design work generally, constraint specificity is load-bearing: vague constraints produce designs that satisfy nothing in particular; specific constraints force the trade-offs design work actually requires.