This study aims to develop a systematic framework for defining interoperability requirements within the Electric Motorcycle Swappable Battery (EMSB) ecosystem by applying the FACTS methodology and Dynamic Open Innovation. The proposed model integrates stakeholder engagement, technical standards analysis, and validation to establish interoperability across information, function, and business layers. Using a confirmatory factor analysis and structural equation modeling approach, the model was empirically validated through expert input from key EMSB stakeholders in Indonesia. Results reveal acceptable model fit, with significant explanatory power across interoperability constructs. Findings emphasize the need for cross-brand standardization and stakeholder collaboration to support EMSB infrastructure development. This research contributes to both theory and practice by offering a validated model that aligns technical, organizational, and institutional dimensions of interoperability. It also provides strategic insights for policymakers and practitioners in implementing effective standardization strategies. Future research should explore model extensions by incorporating regulatory flexibility, cybersecurity measures, and cross-national comparisons to enhance the applicability of the interoperability framework in diverse contexts.