Worked on refining SaaS example CSV data schemas in the FinOps-Open-Cost-and-Usage-Spec/FOCUS_Spec repository, focusing on enhancing data quality and future maintainability. The primary feature involved removing deprecated columns, introducing a HostProviderName field, and standardizing naming conventions and column order to align with downstream analytics requirements. This update improved data ingestion reliability and clarified provider attribution, supporting more accurate reporting. Scenario descriptions were updated to match the revised schema, strengthening documentation and test coverage. The work demonstrated skills in CSV manipulation, data cleaning, and data management, emphasizing backward-compatible schema evolution and collaborative development using Git workflows.