As-built genealogy is the recorded lineage of what was actually used, performed, and changed during the manufacture of a specific product, unit, lot, or assembly. It shows the real built configuration, including materials, components, serial or lot numbers, operation history, revisions, inspections, and other production records that establish how the item was made.
In manufacturing systems, as-built genealogy is commonly captured in an MES, electronic traveler, quality system, or traceability database. It supports production traceability by linking a finished item back to its consumed parts, process steps, inspection results, nonconformances, rework, and configuration changes. In aerospace and other regulated or quality-sensitive environments, this record is often important for understanding the actual build state of a part or assembly.
As-built genealogy should not be confused with the engineering bill of materials or planned routing. Those describe the intended design and process. As-built genealogy records the execution history and actual configuration after production activity has occurred.