We start from what you run today and what it costs — because without a baseline you cannot say afterwards whether the move paid off. Then we go through the applications one at a time and decide each on its own: rehost, replatform, rebuild, or leave alone. That last one is the right answer more often than suppliers admit.
The move itself runs in phases. The old environment keeps running until the new one has proved itself, and every step is reversible. The data migration is rehearsed against a copy as many times as it takes, and every run has a written rollback plan.
When choosing a partner, ask how spend is tracked and who is accountable for the invoice after the move. Ask what the exit plan is — how expensive it would be to move off again. And ask who owns the cloud accounts: if the infrastructure sits in a supplier’s account, it isn’t your cloud, it’s theirs.