Significant opportunities exist to preserve and reuse simulation and analytical models across engineering and manufacturing domains. This presentation introduces a structured framework for the long-term archiving and retrieval of such models, emphasizing compliance, integrity, and usability throughout their lifecycle. Leveraging capabilities developed by the Modelica Association, LOTAR International, and tool developers, the framework supports the creation of interoperable and reusable model archives. Four primary stakeholders—Model Requester, Model Developer, Model Archiver, and Model Consumer—collaborate to define requirements, develop or identify existing models (primarily using Modelica), and ensure rigorous validation and verification. The Functional Mock-up Interface (FMI) enables tool-agnostic model exchange and co-simulation, while System Structure and Parameterization (SSP) supports system integration. Adherence to the LOTAR P500 standard ensures long-term model interoperability and integrity. This framework enables organizations to establish a reliable, standardized, and accessible repository of analytical models for future engineering applications.