Cloud migration is not a single task. It is a structured process that moves workloads from existing environments into the cloud while redefining how infrastructure is operated.
Breaking migration into clear stages provides control over complexity and reduces risk. Each stage builds on the previous one, influencing how workloads perform once they are in production.
1. Assess
The assessment stage focuses on building a detailed understanding of your current infrastructure. This includes applications, data, dependencies and performance requirements.
Workloads vary in complexity. Some can be migrated with minimal changes, while others rely on legacy systems, tightly coupled architectures or unsupported technologies that require modification.
A thorough assessment identifies:
- Which workloads are suitable for migration
- How systems interact and depend on each other
- Where potential risks or constraints exist
This stage defines the scope of the migration and informs all subsequent decisions.
2. Plan
Planning establishes how the migration will be executed. This involves selecting the appropriate migration approach, prioritising workloads and structuring the sequence of migration.
Different workloads may require different strategies, ranging from rehosting to full rearchitecture. These decisions affect both the speed of migration and the long-term performance of the environment.
Depending on your requirements, you may opt for a public, private, virtual private or hybrid cloud model. Each introduces different levels of control, isolation and resource allocation, which need to be aligned with workload behaviour and compliance requirements.
Cloud architecture at this stage should be designed around how your applications operate in production. This includes ensuring sufficient resource allocation, appropriate network design and alignment with budget constraints.
Planning also includes:
- Mapping dependencies between systems
- Defining migration phases or waves
- Establishing rollback procedures
- Setting validation and testing criteria
This stage provides the framework for controlled execution and reduces the likelihood of disruption.
3. Migrate and optimise
The migration stage involves moving workloads into the cloud according to the defined plan. This includes transferring data, configuring environments and ensuring applications run correctly in the new infrastructure.
Validation is essential at this point. Systems must be tested to confirm they meet performance, availability and integration requirements.
Once workloads are live, optimisation becomes an ongoing activity. Cloud environments allow for dynamic resource allocation, but performance and cost efficiency depend on how these capabilities are configured.
Optimisation may involve:
- Adjusting resource allocation based on demand
- Implementing scaling and load balancing
- Refining storage and data access patterns
- Improving application architecture over time
This stage continues beyond initial migration, shaping how infrastructure performs in the long term.
What you should consider
Each stage of cloud migration introduces decisions that affect operational outcomes.
This includes:
- The accuracy of your initial assessment
- The suitability of your chosen migration strategies
- How effectively risks are identified and managed
- How performance and cost are monitored after migration
Treating migration as a staged process allows these factors to be addressed systematically.
The role of managed infrastructure
Cloud migration extends into ongoing infrastructure management. Performance, security and cost control depend on how the environment is maintained after workloads are moved.
A managed infrastructure provider supports this through continuous monitoring, optimisation and governance. This ensures that each stage of the migration delivers stable and predictable outcomes.
The next steps
Understanding the three key cloud migration steps provides a foundation for building a structured migration strategy.
If you are planning a migration or reviewing your current approach, a detailed assessment can help define the most effective path forward. Contact us to speak to a member of our team.
