Parametric design

Parametric design describes a design through variables and the relationships between them rather than through lines drawn one by one. Floor height, panel width or sun angle each become a parameter. Change a value and everything that depends on it updates by itself, so the designer builds a family of solutions instead of a single one.

How it is used in architecture

The familiar example is a facade of panels that open or close in response to the sun: each panel’s angle follows a rule tied to its position and the light it receives. The same logic drives stadium seating geometry, the structural grid of a shell roof or plan variations across a housing block. Visual programming tools such as Grasshopper let you build these relationships with boxes and wires. Parametric families in BIM software are a more everyday case; widen a window family and its frame, glass and lintel adjust along with it.

A method, not a style

Parametric design is often equated with flowing, curvy buildings. Yet the method works just as well for a flat, restrained facade; the real gain is the speed with which a design can absorb change. It helps visualization too, since variations become ready to render without being modeled separately. We look at where this kind of experimentation is taking architecture in our piece on new architectural design trends.