Cloud migration and modernization is a continuous process that involves significant organizational change management spanning people, process, and technology. Taking a holistic approach will not only help you navigate the journey successfully but also help ensure that your organization realizes new benefits—including efficiency, agility, and scale—once your workloads are running in the cloud.
In Planning
- Define your strategy
- Plan for your move
In Implementation
- Get ready for the move
- Migrate your workloads
- Modernize your apps and data
In Operation
- Govern and secure your workloads
- Manage and cost-optimize your cloud environments
Checkout this for more details
https://azure.microsoft.com/en-us/migration/#overview
Hope this will help you.