Data Bricklaying Diary

Oct 8, 2026 · Databases

Master Data Aligned but Reports Wrong? The Three-Layer Fix: Identity, History, Query Logic

The article explains why unified equipment codes still cause report errors due to missing temporal equipment-workstation relationships, and outlines a three-layer diagnostic (identity alignment, historical relationships, query semantics) advocating reuse of existing master data and history tables, complemented by ontology for shared semantics, with regression testing to verify fixes.