September 2025 monthly performance highlights across QSD-Group/EXPOsan and QSD-Group/QSDsan. The work focused on delivering stable, reproducible results, improving maintainability, and enhancing user-facing documentation and packaging to support reliable deployments. Overall impact: Increased reliability of core calculations, reduced test flakiness, and stronger packaging/documentation foundations that enable faster onboarding, automated builds, and clearer release signaling for stakeholders.

August 2025 — Focused on reliability and test accuracy in QSD-Group/EXPOsan. No user-facing features delivered this month; the primary value came from stabilizing simulation tests and improving model robustness.

July 2025: Concentrated on reliability and compatibility with BioSTEAM ecosystem. Implemented a BioSTEAM Time Tracking Compatibility fix to ensure accurate function timing under API changes, and updated dependency pinning in setup.py to lock BioSTEAM and ThermoSTEAM versions. These changes improve runtime accuracy, reproducibility across environments, and reduce integration risk for downstream models.

May 2025 performance summary for QSDsan and EXPOsan development. Core progress focused on aligning unit models with BioSTEAM conventions, stabilizing tests amid Biosteam updates, and advancing Python 3.12 readiness across CI, docs, and dependencies. Delivered concrete enhancements that improve reliability, test coverage, and future maintainability, while laying groundwork for future feature work such as pressure drop estimation.

February 2025 monthly summary for QSD-Group/EXPOsan. Focused on stabilizing the test environment and ensuring reliable validation of baseline scenarios. Main outcomes included activation of the baseline test configuration and improved test reliability through targeted test suite adjustments.

January 2025 contributions focused on stabilizing simulation workflows, cleaning the codebase for maintainability, and improving molecular weight handling to boost model accuracy. Delivered across QSD-Group/EXPOsan and QSD-Group/QSDsan with robust loading, post-load system simulations, clearer output paths, and configurable handling for inaccurate molar weights. The work reduces runtime errors, accelerates development, and yields more trustworthy process models for customers.

December 2024 monthly summary for QSD-Group projects (EXPOsan and QSDsan). The month focused on delivering core features, strengthening SAF stability and test coverage, and improving release governance to support faster, more reliable iterations and future recycle-system work.

November 2024 monthly summary focusing on key accomplishments across QSDsan and EXPOsan, emphasizing business value, reliability, and maintainability. The month delivered documentation improvements, CLI enhancements, significant bug fixes in impact analysis and LCA flows, and foundational work for Biobinder integration, plus system-wide code cleanup and TEA/energy accounting refinements that strengthen decision support for economics and environmental assessments.

October 2024 monthly summary focusing on delivering scalable system-level modeling, cost optimization, and robust economic evaluation support across EXPOsan and QSDsan. Delivered modularization to improve maintainability, integrated labor cost handling, introduced uncertainty analysis for SAF, and added TEA indices for direct economic evaluations. Overall, these efforts enhanced costing accuracy, simulation performance, and business value through clearer analytics, reusable components, and faster decision support.