ITPEC FE Morning October 2021 Question 56
ITPEC FE Morning October 2021 — Question 56 of 80
A system migration plan describes how to transition from an old system to a new one. A critical component is the rollback plan — the criteria and procedure for restoring the old system if the migration fails.
Why not others:
- (b) Running old and new systems in parallel increases cost (dual maintenance), not reduces it
- (c) Sharing environment between old and new systems does not simplify migration verification — it can cause data conflicts
- (d) Larger data volumes make single-batch (big bang) migration riskier, not more appropriate — phased migration is preferred
Key rule: A migration plan must always define decision criteria for rolling back to the old system.
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