LambdaStratum

Start with the Business Case

Cloud migration is fundamentally a business decision, not a technical one. Before evaluating platforms or architectures, articulate the outcomes you want to achieve. Are you seeking cost reduction, improved scalability, faster time-to-market, or enhanced reliability? Each goal implies different migration strategies and priorities.

Document your success criteria in business terms: “Reduce infrastructure costs by 30% while maintaining 99.9% availability” is more actionable than “move everything to the cloud.” These criteria become your north star when technical decisions become complex and trade-offs emerge.

Assess Before You Migrate

Not every workload belongs in the cloud, and not every workload should migrate as-is. Conduct a thorough assessment of your application portfolio, categorizing systems by their cloud-readiness and business criticality. Some applications migrate cleanly with minimal modification. Others require significant refactoring to realize cloud benefits. A few may be better served by retirement or replacement.

This assessment phase also reveals dependencies that might not be obvious: shared databases, network configurations, security requirements, and integration points. Mapping these dependencies early prevents painful surprises during migration execution.

Choose the Right Migration Strategy

The “6 Rs” provide a framework for migration decisions:

Rehost (lift and shift): Move applications without modification. Fastest path but may not deliver cloud benefits.
Replatform: Make targeted optimizations during migration. Balances speed with improvement.
Repurchase: Replace with SaaS solutions. Eliminates maintenance but sacrifices customization.
Refactor: Re-architect for cloud-native patterns. Maximum benefit but highest effort.
Retire: Decommission unnecessary systems. Reduces complexity and cost.
Retain: Keep on-premises for now. Valid when migration risks outweigh benefits.

The right strategy varies by workload. A monolithic legacy application might rehost initially, then refactor incrementally. A commodity capability like email might repurchase. A strategic differentiator might warrant immediate refactoring.

Plan for Operational Readiness

Cloud migration doesn’t end when applications are running in the new environment. Plan for ongoing operations: monitoring, alerting, incident response, cost management, and security. Cloud platforms offer powerful tools, but they require new skills and processes.

Invest in training before migration, not after. Teams that understand cloud-native operations catch issues early and optimize continuously. Teams that learn on the job make expensive mistakes.

The Long Game

Successful cloud migration is measured not by the cutover date, but by the years that follow. Organizations that approach migration strategically—clear business goals, thorough assessment, appropriate strategies, and operational readiness—realize lasting benefits. Those that chase speed over substance often find themselves planning remediation projects before the migration dust settles.