The short answer
A PMS migration rollback plan identifies the last recoverable source state, which system may accept writes during each cutover stage, objective rollback triggers, decision authority, recovery steps, alternate processing, communication owners, and post-rollback reconciliation. Test the plan before cutover; a backup that has never been restored is not a demonstrated rollback path.
Key takeaways
- Choose the restoration point and write authority before cutover.
- Use objective triggers and a decision deadline.
- Reconcile transactions created during the cutover window after rollback.
Control writes across the cutover boundary
Map when the source becomes read-only, when the destination may accept production writes, and how emergency or manual transactions are captured. If both systems can change the same fact, define conflict ownership and reconciliation.
A rollback does not simply reopen the old system. It must account for every valid transaction, document, message, approval, and external action created after the restoration point.
Write the rollback decision record
NIST contingency guidance connects recovery priorities, backups, alternate processing, tests, and recovery procedures. This plan borrows that structure for a narrower software migration; it is not a claim that a small property operation must implement a federal standard.
| Element | Pre-cutover decision | Evidence during execution |
|---|---|---|
| Recovery point | Exact source snapshot and restore owner | Backup identifier and restore test |
| Write authority | System of record by stage | Freeze and activation timestamps |
| Trigger | Objective failure and decision deadline | Failed test and impact |
| Continuity | Manual or alternate processing for critical work | Temporary record IDs and owners |
| Recovery | Ordered restore and access checks | Step results and exceptions |
| Reconciliation | Cutover-window population and matching method | Every external and internal action accounted for |
| Communication | Staff, vendor, owner, or resident routes as appropriate | Message version and sent record |
Rehearse the decision, not only the restore command
A rehearsal should reveal who can declare rollback, how late the decision can occur, whether credentials and exports work, and how temporary transactions return to the source. Record actual duration and gaps.
If the test cannot use production data, document what remains unproven. Do not convert a tabletop discussion into evidence that restoration succeeded.
Operational checklist
Mark your progress, then save a working copy. Selections reset when you leave this page. A checked box is not an approval or evidence of completion.
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Recoverable source snapshot identified
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Restore test completed and timed
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Write authority defined for every stage
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Objective triggers and deadline approved
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Alternate processing records designed
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Cutover-window reconciliation method ready
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Communication and final authority assigned
0 of 7 marked
Edge cases
- An external payment completed during cutover: reconcile the provider outcome before recreating anything.
- The source license or access is scheduled to end: keep rollback access inside the approved cutover plan.
- Only one domain fails: use the pre-agreed release decision; do not invent a partial rollback during the incident.
Sources and references
Follow each source to check the underlying claim. Access checks and professional review are different steps.
1. Primary source · National Institute of Standards and Technology
Contingency Planning Guide for Federal Information SystemsContingency planning connects recovery priorities, backup, alternate processing, testing, and recovery procedures. Applied here as a limited migration-planning analogy.
Source checked 2026-09-18
Automated source-access check: 2026-09-18.
Continue the workflow
PMS migration acceptance criteriapms migration reconciliationRecover from an uncertain integration outcomeRevision history
2026-09-18
Initial Phase 2 operational article with an original decision artifact, explicit failure states, primary-source scope notes, and AI-assisted technical review.