Legacy system migration
Data and functionality migration from legacy systems: mapping, cleansing, transformation, reconciliation and cut-over.
Move decades of data to a new system — accurately.
6 deliverables, a 4-stage approach and 5 related technologies.
Overview
The hardest part of replacing a legacy system is usually its data: inconsistent formats, duplicates, implicit meanings and years of workarounds.
We profile and map legacy data, cleanse and transform it with traceable rules, rehearse migrations repeatedly and reconcile totals and samples with business owners before cut-over.
What we deliver
- Data profiling report
- Mapping and transformation rules
- Cleansing approach with owner sign-off
- Repeatable migration scripts
- Reconciliation reports
- Cut-over and fallback plan
Use cases
Typical situations where this service is the right fit.
Replacing old ERPs
Move masters, balances and history to a new ERP.
Database platform change
Migrate from older database engines.
Merging systems
Combine records after mergers or consolidation.
How we work
The stages we follow. Each ends with something you can review.
- 01
Profile data before mapping
- 02
Automate and repeat migrations
- 03
Reconcile with business owners
- 04
Keep legacy read-only access after cut-over
Things to consider
Questions worth answering before you commit budget.
- Data cleansing decisions are business decisions.
- Archival of legacy data may be required for compliance.
Technologies and engagement
Technologies we often use
We choose the stack with you; this is a starting point, not a requirement.
Ways to engage
- Fixed-scope project with milestones
- Dedicated team billed monthly
- Ongoing support and improvement retainer
Frequently asked questions
Related services
Application modernisation
Incremental modernisation of ageing applications: framework upgrades, architecture refactoring, UI renewal and cloud readiness.
Database design and administration
Schema design, performance tuning, migrations, replication, backups and upgrades for PostgreSQL, MySQL, SQL Server, MongoDB and more.
Custom integrations
Bespoke connectors for proprietary, legacy or niche systems — files, databases, SOAP, EDI, message queues and device protocols.
Ready to talk about legacy system migration?
Share a few details and we will reply with questions, options and an honest view of effort.