December 2024 monthly summary: Delivered two cross-repository initiatives that improve data reliability, configuration management, and development flow, translating to faster feature estimation and more consistent PR governance. In ONSdigital/monthly-business-survey-results, delivered Calibration Group Map Loading Enhancement in Estimation by refactoring the estimation configuration to load calibration_group_map directly within apply_estimation, removing config overwrites in the estimate function, and updating the key to calibration_group_map_path. This clarifies data flow, reduces misconfiguration risk, and improves maintainability of the estimation pipeline. In ONSdigital/construction-survey-results, established Code Ownership configuration for Automated PR Review Routing by introducing CODEOWNERS and relocating the file to the root .github directory, improving review routing, accountability, and security. Commit activity highlights include the changes in 6c316c061447430195a1cd1b751103a6724a51a7, 6036a4c8870e99743e46a1fe7162078becc02c18, and ecb96192ae7011002b08cbbcfca66d3e342aeeb6.