An organization plans to retire a manual service after an AI-assisted replacement launches. Which two transition measures are most relevant? Select 2 answers.

1. Define appropriate fallback and escalation for cases the AI workflow cannot safely complete
2. Assume every generated answer can be accepted without review
3. Measure adoption solely by the number of launch emails
4. Validate user readiness and support arrangements for the changed workflow
5. Remove the old process before confirming transition readiness