Procedural constraint is a self-imposed rule or system—such as a fixed form, alphabetical sequence, mathematical pattern, or exclusionary technique—that governs a poem’s composition, often derived from Oulipian or conceptual poetics; these constraints function not as limitations but as generative frameworks that spark creativity, disrupt habitual expression, and foreground language’s materiality, as seen in Georges Perec’s lipogrammatic novel La Disparition or in contemporary poets who write under constraints like “no verbs” or “only words from a single dictionary page.”

Procedural constraint uses rule-based methods (e.g., lipograms, Fibonacci) to generate form. Related to systematic limitation and productive verse. Constraints spark creativity—try writing a poem without the letter “e” to discover unexpected solutions.