November 2025 monthly summary for DEFRA/epr-common-data-api: Delivered data accuracy and performance upgrade for Organization Submissions Identification. Refactored SQL stored procedure to accurately identify organizations with approved submissions after a specified date, addressing data quality issues and reducing processing time. Included fix to main (#306) to stabilize the change.

Month: 2025-10 — DEFRA/epr-common-data-api: primarily focused on maintenance and risk reduction. No new features delivered this month; major work centered on cleaning up stored procedures in get-approved-submissions to improve maintainability and reduce confusion. This work reduces technical debt, clarifies code paths, and strengthens future change safety.

September 2025 monthly summary focusing on key features delivered, major bugs fixed, impact, and technologies demonstrated for the DEFRA epr-common-data-api workstream. The main deliverable this month is the POMM Submissions Processing Enhancements which extend the processing window, improve data ownership logic when both H1 and H2 submissions exist, and refine subsidiary ID handling and batch logging. These changes enhance data integrity, processing reliability, and auditability for POMM submissions across producers and schemes.

June 2025 monthly summary for DEFRA/epr-common-data-api: Delivered a precise reporting enhancement by refactoring the get-approved-submissions.sql stored procedure. The updated logic enables handling partial periods and aggregates data based on the latest submission dates, resulting in more accurate reporting of packaging material weights and transitional packaging. This work improves data processing accuracy, supports regulatory reporting requirements, and reduces manual validation effort.

May 2025 performance summary for the DEFRA/epr-common-data-api repository: Delivered a critical bug fix to the Get Approved Submissions Data Retrieval process, improving accuracy and reliability of approved submissions data. The fix introduces a ValidOrganisations CTE to correctly identify organizations with records after the approval date and updates selection logic to consider only Accepted decisions when determining the most recent file ID. These changes reduce downstream data errors and support more trustworthy reporting for cross-day approvals.

April 2025 monthly summary for DEFRA/epr-common-data-api: Delivered targeted database maintenance and query optimization for the Approved Submissions workflow, focusing on performance, maintainability, and data accuracy. Removed obsolete stored procedures, reordered SQL filtering, and introduced configuration changes and cleanup of unused tables, resulting in faster and more reliable data retrieval for approved submissions. This work supports faster reporting cycles and improved data quality for business decisions.

Month: 2025-03 Key features delivered: - Implemented server-side organization size filtering (size 'L') for GetApprovedSubmissionsWithAggregatedPomData in DEFRA/epr-common-data-api. This included updates to the API, service layer, and stored procedure to ensure consistent filtering and results across the data pipeline. - Added/updated unit tests to validate the new filter and prevent regressions. Major bugs fixed: - None reported or fixed this month. Overall impact and accomplishments: - Improves data accuracy and relevance for approvals by returning only submissions associated with large organizations, enabling more targeted reporting and compliance checks. - Reduces payloads and processing on downstream systems by applying server-side filtering at the source, contributing to better performance and scalability for high-volume queries. - Demonstrates end-to-end ownership: API surface, business logic, and data access updated in a cohesive change with tests to ensure reliability. Technologies/skills demonstrated: - Backend API development and service layer changes, SQL stored procedures, and end-to-end data filtering. - Unit testing and test-driven validation of new behavior. - Code ownership and traceability through commit - 449d0718cce3e2ebacbaf2d18c8d4f6346175ccc.

February 2025 Monthly Summary for DEFRA/epr-common-data-api: Delivered a crucial bug fix in Packaging Materials Reporting that improved accuracy and consistency across partial reporting periods. Implemented changes to consolidate 'PC' and 'FC' packaging materials into a single 'PC' category, refactored the aggregation to sum weights based on the latest submission dates, and applied proportional adjustments for partial periods. This change reduces variance in reported weights, aligns with the most recent data, and enhances reliability of regulatory and analytics reporting. Implemented via targeted SQL stored procedure fix (commit b673a0380928f652ccb9e5c6a96190402c0c8dd3: "Partial calculation and PC and FC (#124)").

January 2025: Reliability and data accuracy improvements in the DEFRA/epr-common-data-api submissions reporting pipeline. Implemented fixes for partial-period data accuracy and weight-based aggregation, corrected period/organization data selection, and ensured proper schema handling for empty results. Performed essential database cleanup by removing an obsolete stored procedure to reduce maintenance risk and simplify future changes. These changes enhance data accuracy for regulatory reporting and improve overall reporting performance.

December 2024 monthly summary — DEFRA/epr-common-data-api Key features delivered: - Partial Submissions Data Aggregation and Reporting: Implemented stored procedure sp_GetApprovedSubmissionsWithAggregatedPomDataIncludingPartialV3 to correctly process and aggregate weights for partial data submissions, enabling accurate reporting for partial periods and addressing issue #73. Major bugs fixed: - Fixed reporting gaps for partial submissions by refining aggregation logic; ensured partial-period data is included accurately in standard reports (addressing issue #73). Overall impact and accomplishments: - Enhanced data integrity and regulatory reporting reliability for partial submissions; improved data-to-decision quality for stakeholders; reduced need for manual reconciliation. Technologies/skills demonstrated: - SQL stored procedures, data aggregation, partial data handling, version control and issue tracking, back-end data modelling; cross-functional collaboration. Commit reference: - 905c607d2adf73bc6d1cd27ba5dff797e0b489ee — "update to use partial (#73)".

November 2024 was focused on delivering precision data access, enhanced calculation accuracy, and stronger maintainability across DEFRA data APIs. Key outcomes include a GUID-based Organisation ID with a new Periods V2 stored procedure for DEFRA/epr-common-data-api, enabling more precise data retrieval with updated tests and data entities; enhanced obligation calculations in DEFRA/epr-prn-common-backend with year-based filtering and PRN-acceptance tracking, supported by unit tests; and a backend refactor for the PRN service that renames MaterialWeight to Tonnage, adds end-to-end logging, and employs dependency injection for IConfiguration and ILogger to improve maintainability and observability. These changes reduce data ambiguity, improve calculation reliability, and strengthen operational visibility, delivering measurable business value through more reliable analytics and faster issue resolution.