SMILE v5.0: The Universal Methodology That Turns Any Project Into a Continuously Learning Digital Twin

This paper argues a specific and falsifiable claim: any project that applies SMILE (Sustainable Methodology for Impact Lifecycle Enablement) will, as a consequence of that application, become a digital twin project. The digital twin is not the objective; it is the outcome. SMILE is grounded in five theoretical pillars: Design Science Research, Actor-Network Theory, boundary object theory, absorptive capacity, and benefits management. The paper provides complete six-phase specification across four perspectives (People, Systems, Planet, AI), twenty structured benefits, cross-domain validation across eight verticals, a five-level maturity model, the AEST temporal architecture, SPIN spatial framework, the Crucible trust layer, and comparative analysis against TRIZ and PRINCE2. Version 5.0 includes 83 references (72 external, 11 corpus self-citations), 6 publication-quality figures, and corrected ORCID. This is the primary SMILE citation across the 39-paper corpus it anchors.