The Constraint Migration Framework: Shifting Bottlenecks, Contestability, and Adaptation in Complex Socio-Technical Systems

Interventions in complex socio-technical systems can succeed at their stated target while pressure, burden, scarcity, or control reappears elsewhere. A price restriction may be followed by new fees or degraded quality; automation may remove a production bottleneck while making judgment, assurance, energy, or coordination newly binding; a formal right may remain intact while the practical cost of exercising it moves into paperwork, delay, expertise, or evidence. The Constraint Migration Framework (CMF) offers a common analytical language for these patterns. It calls each population- and horizon-specific interaction point at which a constraint is encountered, exercised, enforced, or contested a **surface**. CMF proposes that when change alters one part of a system's constraint landscape, actorsreallocate adaptive effort across other reachable surfaces. A binding constraint, or the burdens and opportunities organized around it, may therefore be displaced, transformed, distributed, masked, or reconstituted rather than eliminated. CMF combines three linked layers. The **structural layer** identifies constraints, bottlenecks, surfaces, actors, migration objects, and paths. The **contestability layer** examines whether situated affected parties, together with accessible support, can perceive, understand, challenge, alter, route around, or exit a constraint. The **temporallayer** examines time-dependent effects such as masking, biomarker drift, stress accumulation, thresholds, crises, and stabilization. Across the layers, CMF also distinguishes a specified multidimensional **system state** from the **observed state** produced by a particular indicator or decision-maker. Stability under one projection does not by itself establish systemic stasis. The framework synthesizes established work on unanticipated consequences, crime displacement and diffusion, regulatory dialectics, exit and voice, administrative burden, metric pressure, offsetting behavior, bottleneck strategy, institutional governance, and complex adaptive systems. Its practical output is a migration map, a population-specific contestability profile, and a projection-aware monitoring plan with observable implications and falsifiers. A worked analysis of the Medicaid continuous-enrollment unwinding shows how the method distinguishes substantive eligibility from procedural access, identifies burden and visibility migration, handles measurementendogeneity and subgroup counter-evidence, and derives prospective hypotheses rather than treating a retrospective application as causal validation.