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4 Steps to Run Legacy and Cloud Systems Side by Side

Author / Direction
Direction de l
Published
28 March 2019
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Why Your SME Must Master Hybrid Operations Now

Your accounting team still uses that 15-year-old ERP system. Your sales team just adopted a cloud CRM. Your IT budget won’t cover a complete overhaul. Sound familiar?

Most mid-market companies run a mix of legacy and cloud. SMEs that run their hybrid estate well decide faster than those stuck on purely legacy infrastructure.

The reality: you don’t need to choose between old and new. You need to make them work together.

Step 1: Map Your Current System Dependencies

Start by documenting what actually connects to what. Your legacy inventory system might feed data to three different departments. Your new cloud tools might duplicate functions you already have.

Create a simple flowchart showing data movement between systems. Identify which processes are fully digital versus which still require manual intervention. This mapping reveals integration opportunities you didn’t know existed.

Focus on the systems your employees use most frequently. These are your integration priorities, not the systems that cost the most to maintain.

Step 2: Establish Data Translation Points

Legacy systems and cloud platforms rarely speak the same language. Your 2010 database exports CSV files. Your 2024 cloud service wants JSON APIs. You need translation layers.

Implement middleware solutions that can read from your legacy systems and write to your cloud platforms. Popular options include Zapier for simple workflows or MuleSoft for complex enterprise integration.

Don’t aim for real-time sync everywhere. Batch processing overnight works fine for most SME operations and reduces system strain on your legacy infrastructure.

Step 3: Train Your Team for Dual-System Fluency

Your employees need to navigate both environments confidently. This isn’t about becoming technical experts—it’s about understanding when to use which system for which task.

Employees who move easily between systems get more done than those fighting every switch.

Create simple decision trees: use the legacy system for historical reporting, use the cloud system for real-time collaboration. Document these workflows and make them accessible during the transition period.

Schedule regular check-ins to identify friction points. Your accounting team might discover they’re entering the same data twice, revealing an integration opportunity.

Step 4: Plan Your Gradual Migration Strategy

Running parallel systems isn’t your end goal—it’s your transition strategy. Plan which legacy functions move to cloud platforms first based on business impact, not technical convenience.

Start with non-critical processes. Move your document storage before touching your financial systems. Test cloud backup solutions before migrating your primary database.

Set realistic timelines. Complete migrations take 18-36 months for most SMEs. Rushing creates downtime and data loss risks that outweigh any efficiency gains.

Budget for overlap periods where you’re paying for both systems. This redundancy cost is temporary and prevents the business disruption that comes from rushed migrations.

Making Hybrid Operations Your Competitive Edge

While your competitors struggle with all-or-nothing system decisions, you’re getting work done efficiently across both environments. Legacy systems provide stability and proven workflows. Cloud platforms offer flexibility and modern features.

Your hybrid approach lets you adopt new capabilities without disrupting core operations. You can test cloud solutions with low-risk processes while maintaining business continuity through your existing systems.

The key is intentional management, not accidental complexity. Know why each system exists in your environment and what role it plays in your operational efficiency.

Legacy vs Cloud vs Hybrid Approach Comparison

CriteriaPure LegacyPure CloudHybrid Management
Implementation SpeedNo change needed6-18 monthsGradual over 18-36 months
Upfront CostsMaintenance onlyHigh migration costsModerate integration costs
Business DisruptionNoneSignificant during migrationMinimal with proper planning
Future FlexibilityLimitedHighBalanced approach
Risk LevelIncreasing over timeHigh during transitionManaged and controlled

Frequently Asked Questions

How long should we run legacy and cloud systems in parallel?

Most SMEs need 18-36 months for a complete transition. The parallel period depends on system complexity and migration priorities, not arbitrary deadlines.

What's the biggest risk of hybrid system management?

Data inconsistency between systems is the primary risk. Establish clear data ownership rules and regular sync processes to prevent this issue.

Should we migrate everything to cloud eventually?

Not necessarily. Some legacy systems may be more cost-effective to maintain than replace, especially for specialized industry functions.

How do we prevent duplicate data entry across systems?

Implement integration middleware that automatically syncs data between systems. Start with your most frequently used data flows first.

What if our legacy system vendor stops support?

Create an accelerated migration plan for unsupported systems. These become your highest priority cloud migrations due to security and compliance risks.

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