For 2025-09, the NREL/ComStock work focused on delivering data engineering improvements to postprocessing, export formats, climate-zone analysis, and production stability. The month delivered tangible business value by increasing data granularity, enabling analytics-ready outputs, and ensuring reliable runs in production.

Monthly work summary for 2025-08: Delivered critical data quality improvement and a new analytical model in NREL/ComStock, enabling precise gap analysis between reported and modeled electricity consumption in the commercial sector.

July 2025: Delivered key feature enhancements for ComStock, expanded time-series analysis capabilities, improved plugin output organization, and updated documentation. Strengthened data accuracy, analysis capability, and maintainability with stronger test coverage and clearer integration paths for downstream users.

June 2025 monthly summary: Delivered substantive business value and technical improvements across two repositories (NREL/ComStock and NREL/openstudio-standards). Key features delivered in ComStock include a new energy performance measure, major enhancements to LoadsSummary with script version support and run-period data aggregation plus expanded test data coverage, and improvements to infiltration/ventilation load calculations for greater accuracy. Additional progress includes ScoutLoadsSummary output restructuring to streamline processing and reporting, and profiling tool enhancements to report local simulation time with improved log processing and summary reporting. In openstudio-standards, resolved a file path resolution reliability issue by replacing __dir__ with File.dirname(__FILE__), ensuring stable access to data files used by exterior lighting and refrigeration modules, and released an updated library version (0.8.2) to reflect the changes. These efforts enhance model fidelity, reliability, maintainability, and developer productivity, while enabling faster, more reliable decision-making through better diagnostics and data handling.

For 2025-04, delivered targeted enhancements to NREL/ComStock, improving utility data mapping and system reliability. The work focused on expanding tract-to-utility data referencing and fixing a critical path-loading issue to ensure stable runtime behavior.

March 2025 Monthly Summary: Reliability, data quality, and business value improvements across two repositories (NREL/OpenStudio and NREL/ComStock). Delivered targeted bug fixes, feature enhancements, and maintenance cleanups that improve input validation, data integrity, and utility bill analytics, enabling more accurate energy analyses and streamlined workflows.

February 2025 – NREL/ComStock: Delivered a refactor of the utility cost calculations in the post-processing module and added data extraction enhancements for electricity and state-average costs. Introduced new methods and constants to support extraction and aggregation of utility bill data, improving accuracy and maintainability of building-level costs. No major bugs reported; focused on stability and pipeline clarity. Technologies demonstrated: Python, modular design, constants-driven data modeling, and data extraction patterns.

January 2025 performance highlights for NREL/ComStock: - Delivered sampling-region based utility bill estimation and reporting enhancements, enabling more accurate cost projections by combining sampling-region data, URDB rates, and regional/state cost statistics. - Added sampling region and state lookup data structures and mappings to support region-specific billing calculations, laying groundwork for scalable regional analytics. - Refactored post-processing to streamline integration of utility bill data, reducing complexity and easing future extensions. - Expanded test coverage to validate sampling_region scenarios and ensure reliability across rate datasets. - Enhanced reporting to produce min/max/median/mean bill labels across rates, improving clarity for budgeting and stakeholder comparisons.

December 2024 (NREL/ComStock) focused on delivering a more complete and accurate heat transfer/heat balance model in the building energy simulation, with improvements that enhance prediction reliability for retrofit decision-making. The work emphasized traceability, code quality, and alignment with business goals around energy efficiency planning.

Month 2024-11: Delivered a significant emissions reporting enhancement and utility billing integration for NREL/ComStock. Refactored emissions reporting to accurately calculate and report greenhouse gas emissions across end-uses; updated end-use definitions, added custom meter configurations, and improved emission calculation logic to handle varied grid intensity scenarios. Integrated EIA data for natural gas, propane, and fuel oil to improve utility bill calculations. Addressed a critical bug in emissions reporting to ensure correctness (#231).