DATA LIFECYCLE · AI DATA ENGINEERING
Data needs a lifecycle
Data remains governable only when purpose, state, derivation and disposition are controlled together.

01 · ENTRYWhy is the object captured and who owns it?
02 · TRANSITIONSWhich events change state, validity or access?
03 · DISPOSITIONWhich copies and derivatives must reach a controlled end?
CORE METHOD
THE LIFECYCLE MATRIX
Purpose, state, review, retention, dependencies and final action become enforceable rules for each data type.
Withdraw one active source and trace the effect through chunks, embeddings, indexes, summaries and backups.