Data-Migration Validation for GxP Records: A Control-by-Control Approach

Migration is a regulated process, not a file copy

When records move between systems, the risk is not limited to whether the destination database accepts the file. Meaning, relationships, timestamps, status, audit history, attachments, permissions, and retention can all be affected. The migration must be planned around the records and decisions that matter to the process.

Define the migration boundary

Identify source systems, data sets, record classes, metadata, attachments, audit trails, users, interfaces, retention requirements, and the cutover point. Decide what will migrate, what will be archived, what will be transformed, and what will be retired. Document the reason for exclusions and the owner of the decision.

Controls to include

1. Profile source data for completeness, duplicates, invalid values, relationships, and known exceptions.
2. Approve a field-level mapping and transformation specification.
3. Protect source data and migration scripts under change control.
4. Test representative, boundary, exceptional, and high-risk records.
5. Reconcile counts, key values, relationships, status, dates, attachments, and critical metadata at the destination.
6. Preserve or explain audit history and any limits introduced by the destination system.
7. Control access during migration and restrict the period in which both systems may be edited.
8. Record exceptions, remediation, retesting, acceptance, and the final cutover decision.
9. Verify retrieval, reporting, backup, and retention after migration.

Reconciliation is more than row counts

A matching record count can hide truncated text, shifted dates, broken links, lost attachments, or a status that changed meaning. Reconcile critical attributes and relationships. Use independent review for high-impact data. If a field cannot be migrated exactly, document the transformation, the impact, and the compensating control.

Keep the evidence usable after cutover

Retain source extracts, mapping versions, scripts or controlled tools, test data, reconciliation results, exception logs, approvals, and the final inventory. Confirm that users can retrieve records and that the organisation can explain the migration to an auditor without reconstructing the story from email fragments.

VLMS Software provides a useful lifecycle structure for connecting migration requirements, risks, tests, exceptions, and release decisions. A successful migration is one that preserves the record’s meaning and the organisation’s ability to defend it.