Before you make a decision
The cloud introduction provides context; this guide focuses on planning a move. A migration is a change to the way a service operates, not just a transfer of files. Start with what the application needs and who uses it before choosing a destination or a cutover date.
Map dependencies before moving data
Record the application’s databases, scheduled tasks, integrations and authentication services. Identify which systems expect a fixed address or access to an internal network. Include less-visible jobs such as exports and reporting. Ask staff who use the application to describe the workflows that would reveal a broken connection after the move.
Choose a clear success measure
Define what users must be able to do after migration and how the team will test it. Include performance, access, data consistency and operational support. Use realistic sample workloads in a test environment. A successful login alone does not show that an application can complete a customer order, generate an invoice or run an overnight task.
Budget for the transition period
Include time when old and new environments run together, data transfer, migration tools and staff support. Estimate the ongoing bill separately from the project cost. Check how backing up the new environment changes storage and retrieval charges. Document assumptions so the first real invoice can be compared with the original plan and corrected where necessary.
Plan cutover and rollback together
Identify who makes the decision to switch traffic and what evidence would justify reversing that decision. Discuss data changes during the transition so a rollback does not lose work. Rehearse the process in an appropriate test setting. Production changes need the relevant owners involved because moving a service can affect users, integrations and support teams simultaneously.
Finish the work after launch
Review logs, costs and user reports after the move. Confirm that backups and restoration work in the new environment. Retire old resources only after verifying dependencies and retention needs. Assign ownership for provider accounts and documentation, and review permissions created temporarily for the project. Migration is complete when the service can be operated reliably by its ongoing team.
Your comparison worksheet
Bring these questions to the conversation
| Compare | Ask |
|---|---|
| Dependencies | What else must move or remain connected? |
| Testing | Which real workflows prove the move worked? |
| Transition | Who owns the cutover and rollback decision? |
| Aftercare | Who reviews costs, backups and access after launch? |
Your quick checklist
- Inventory applications and hidden dependencies.
- Define end-to-end acceptance tests.
- Budget for parallel environments and transfer.
- Rehearse cutover and document rollback conditions.
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