SMILE: A Universal Methodology for Impact-Driven Digital Twin Implementation — Sustainable Methodology for Impact Lifecycle Enablement

The definitive SMILE methodology paper. Six phases, four perspectives (People/Systems/Planet/AI), AEST temporal architecture, NUDEDA maturity lens, SPIN questioning framework, 20 benefits, cross-domain validation across 8 verticals, DTC CPT framework correspondence, Ward and Daniel benefits management, Crucible verification layer, Zoom-Anchor-AEST interaction model. Working paper and corpus anchor for 39 peer-reviewed articles.