Worked on enhancing the cost-effectiveness modeling diagram within the Yihe-Harry/DSA3101-Group-Project repository, focusing on improving data presentation quality and traceability. Addressed a minor bug by renaming the retraining cycle file and refining both metadata and diagram content, ensuring alignment with the final model lifecycle. Emphasized maintainability and data accuracy for stakeholder review without introducing functional code changes. Utilized XML for diagram data management, applied refactoring techniques, and leveraged Git-based version control to document updates through detailed commits. The work demonstrated a methodical approach to diagramming and metadata management, supporting future maintenance and reinforcing confidence in the project’s data integrity.