Cloud Migration Assumptions Log
This is a practical guide to building a assumptions log for a cloud migration project — a register of the assumptions the plan depends on, to be validated, adapted to the realities of moving systems and data from on-premise infrastructure to the cloud.
What a Assumptions Log is
A assumptions log is a register of the assumptions the plan depends on, to be validated. For the full concept and how it works in general, see Project Assumption. On a cloud migration project it plays the same role, tuned to this kind of work.
Why it matters for a Cloud Migration project
Cloud Migration projects live or die on moving systems and data from on-premise infrastructure to the cloud. A well-built assumptions log gives the team a shared, explicit reference for exactly that — reducing ambiguity, aligning stakeholders, and making problems visible early enough to act. Skipping it, or doing it generically, is how cloud migration projects drift into avoidable delay and cost.
What to include
- Assumption
- Impact if wrong
- Owner
- Validation status
Cloud Migration-specific considerations
Tailor the assumptions log to the risks that most often derail cloud migration projects:
- Underestimated dependencies
- Downtime and data-loss risk
- Runaway cloud costs post-migration
Example
On a real cloud migration project, the assumptions log would be shaped by moving systems and data from on-premise infrastructure to the cloud. In particular, it should explicitly account for the project’s biggest risks — underestimated dependencies, downtime and data-loss risk, runaway cloud costs post-migration — rather than treating them as afterthoughts.