What cloud migration involves
Cloud migration is the process of moving applications, data, and IT operations from on-premises or legacy environments into modern cloud platforms. That can mean on-premises to cloud, cloud-to-cloud moves, or hybrid estates where workloads stay split across different environments.
Most migrations are driven by more than cost alone. Teams are usually trying to improve scalability, agility, resilience, delivery speed, and access to newer technologies while keeping governance, security, and operational control intact.
Challenges
Migration without a clear business case.
The programme starts as a technical exercise without aligned outcomes, priority workloads, or decision criteria.
Hidden dependency and data complexity.
Architecture, system dependencies, latency constraints, and data movement are often underestimated.
Controls added too late.
Security, access design, governance, and cost guardrails are postponed until the platform is already taking shape.
One migration pattern for every workload.
Rehost, replatform, revise, rebuild, and replace choices are collapsed into a single default approach.
Weak post-migration ownership.
Teams arrive in the target cloud without enough clarity around operations, support, release responsibility, or cost control.
A practical cloud migration journey
The strongest migrations move through a staged operating path: assess the estate, mobilise the platform and people around the plan, then migrate and modernise in controlled waves.
Assess the current estate and define the migration case
Evaluate infrastructure, applications, dependencies, and business outcomes so the migration has a credible scope, sequence, and commercial rationale.
Mobilise the team, landing zone, and delivery plan
Address readiness gaps, build the baseline cloud environment, and translate the strategy into a migration plan that teams can execute safely.
Move workloads in stages and improve the platform as you go
Migrate using the right workload strategy, validate security, performance, and cost behaviour, then modernise the services that need a stronger long-term cloud fit.
Choose the right migration strategy for each workload
Cloud migration strategy should be workload-specific rather than ideological. Gartner's 5 Rs provide a useful way to choose the level of change each application actually needs.
Rehost when speed matters more than deep platform change
Lift-and-shift is often the fastest route for workloads that need to move quickly and do not yet justify broader architectural change.
Refactor when the workload needs better cloud fit without a full rebuild
Optimise selected parts of the application and adopt managed cloud services so the workload gains more operational value from the target platform.
Revise when the architecture needs substantial change before migration
Some systems require deeper code and architecture changes first so they can meet resilience, scalability, or compliance expectations in the target environment.
Rebuild when the legacy application no longer serves future needs
A cloud-native rebuild can be the right choice when the existing platform blocks delivery, creates excessive maintenance cost, or cannot support the required product direction.
Replace when a managed product is a better fit than carrying legacy custom software
For some internal systems, moving data into a third-party SaaS platform is more effective than continuing to own and migrate the full application stack.
Build the migration on stronger platform foundations
Migration is easier to sustain when the target environment is designed as an operating platform, not just a destination account. The same source material points to four foundations that matter most.
Start with a clear vision and business case
Define the reason for change, the expected business outcomes, and the measures of success so the migration remains aligned as scope and sequencing evolve.
Model short-term migration costs and long-term cloud economics accurately
Teams need realistic estimates for migration effort, cloud spend, and optimisation benefits so the programme does not create financial surprises after cutover.
Treat migration as organisational change, not only technical change
Readiness, communication, and training are essential when teams are changing operating models, delivery practices, and support responsibilities at the same time.
Build a modern landing zone and platform foundation
The target cloud environment should include baseline controls, secure access, delivery workflows, and platform standards that make the migrated estate easier to run and improve.
See where migration risk is concentrated before you commit to a larger move.
Take the Cloud Migration Readiness Assessment
Use this assessment to understand whether strategy, landing-zone foundations, governance, or delivery readiness is most likely to slow the migration. The result gives you a clearer starting point for planning the next step.
What teams should expect from a well-run migration
Cloud migration should leave teams with a better operating model, not just different infrastructure. The source content points to operational outcomes that matter after the move as well as during it.
Faster deployments through automation and standardisation
Migration should improve the path to production by reducing manual release work and creating a more consistent delivery baseline across environments.
Governance and compliance controls are part of the platform
Access boundaries, guardrails, and auditability are easier to sustain when they are built into the target environment instead of being layered on afterwards.
Cloud spend is easier to control through optimisation and housekeeping
Better platform standards and cost visibility help teams reduce unused resources, oversized workloads, and the inefficiencies that often appear after hurried migrations.
Engineers work on a cleaner platform with less delivery friction
The cloud estate becomes easier to change when environments, access paths, and operational workflows are more predictable for developers and platform teams.