The Moving Company's Insurance Policy

Opening Scene

A reputable moving company carries insurance not because damage is expected, but because a genuine, unexpected problem is always possible, and having a real plan for that scenario matters considerably more once it’s actually needed than any promise made beforehand. Rollback planning for a data migration serves this exact same essential, precautionary function.

In Plain English

Rollback planning means having a genuine, tested procedure for reverting to the source system if a migration encounters serious, unexpected problems, established and validated before the migration actually begins, not improvised after something has already gone wrong. This requires keeping the source system intact and functional until the destination system has been genuinely validated, and having a clear, pre-defined trigger for when rollback should actually be invoked.

The Old Way

Before rollback planning was a well-established, non-negotiable component of migration practice, this precaution was sometimes treated as optional or improvised:

• Migrations sometimes proceeded without a genuinely tested rollback procedure, assuming the migration would simply succeed as planned.
• There wasn’t yet a well-established practice of keeping the source system intact and functional until the destination was genuinely validated.
• When serious problems did arise, rollback was sometimes improvised under pressure, rather than executed according to a pre-tested, well-understood procedure.

Migrating without a genuinely tested rollback plan, improvised only if needed, is what disciplined rollback planning directly addresses.

What’s Changing (and Why AI Is the Reason)

1. Organizations increasingly require a genuinely tested rollback plan as a non-negotiable prerequisite before any significant migration begins.
2. This connects directly to the parallel run practice covered in Article 9, since keeping the source system intact and running is what actually makes rollback possible during that validation period.
3. As AI systems can be genuinely difficult to validate quickly, rollback plans with clear, pre-defined triggers have become especially important specifically for AI-dependent migrations, where subtle correctness problems might not surface immediately.

The Metaphor, Fully Extended

Moving Day	Data Platform Migration Concept
A moving company carrying insurance for unexpected problems	A migration plan including a genuine, tested rollback procedure
Not expecting damage, but planning for the possibility	Not expecting failure, but planning for the possibility
Mattering considerably more once actually needed	Mattering considerably more once actually needed during an incident
A real plan, not just a promise made beforehand	A tested procedure, not just an assumption of success

Quick Recap

• Rollback planning requires a genuine, tested procedure for reverting, established before migration begins.
• The source system should remain intact and functional until the destination is genuinely validated.
• Improvised rollback under pressure is meaningfully riskier than a pre-tested, well-understood procedure.
• AI-dependent migrations especially benefit from clear, pre-defined rollback triggers.

Where This Fits in the Series

Article 10 covered the essential precaution of a tested rollback plan. Article 11 turns to a practical decision about execution: hiring movers versus doing it yourself.