Side-by-side validation
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Side-by-side validation. See Enterprise Integration Patterns.
Definition
Side-by-side validation — practice of automatically comparing the output of an old mapping and a new mapping on the same inputs to detect any functional divergence.
Origin
Pattern documented in data engineering (BigQuery shadow queries, Spark dual write). Adapted to EDI to secure an EDIFACT → UBL migration or an EDIFACT version upgrade D.96A → D.10B.
Use
On 10,000 real messages, the old and new mappings must produce outputs identical to the tag; discrepancies are filed as tickets and fixed before cutover.
Related
- DUAL RUN — see entry.
- CUTOVER WINDOW — see entry.
- PRE VALIDATION — see entry.