Legacy ERP Migration Checklist: 9 Questions Before You Migrate
Replacing or upgrading a legacy ERP is a major business decision.
The ERP may support finance, purchasing, sales, inventory, operations, reporting, manufacturing, customer management and other critical processes.
That means migration isn't simply a matter of installing new software and importing old data.
A successful ERP migration requires a clear understanding of:
Processes
Data
Customizations
Integrations
Reports
Users
Business requirements
Migration scope
Success criteria
The most important question is not:
"How do we move our old ERP to the new system?"
It is:
"What should our business environment look like after migration?"
Here is a practical nine-question framework.
1. Why Are You Migrating?
Start with the business reason.
Possible drivers include:
Legacy technology limitations
Vendor support concerns
Scalability requirements
Poor reporting
Integration limitations
Excessive customization
High maintenance effort
Business expansion
New operational requirements
Write the business case before selecting the technical solution.
Good migration objective
Reduce manual reporting time and improve operational visibility.
Weak migration objective
Move to a newer ERP.
The first describes a business outcome.
The second describes technology.
2. What Problems Exist in the Current ERP?
Document the current pain points.
Create categories:
Process
Where does work slow down?
Data
Where are errors or duplicates?
Reporting
Which reports are difficult to produce?
Integration
Which systems require manual data exchange?
Users
Where are employees creating workarounds?
Technology
Which capabilities are genuinely unavailable?
This creates a current-state assessment.
3. Which Customizations Should Move Forward?
Legacy ERP environments can contain years of customization.
Do not automatically rebuild everything.
For each customization, ask:
Is it still required?
Does standard functionality now solve it?
Can configuration replace it?
Can an extension address it?
Can integration solve it?
Does it provide measurable business value?
Then classify each customization:
Retain
Redesign
Replace
Retire
This can substantially affect migration complexity.
4. Is Your Data Ready?
Data migration is one of the most important parts of ERP modernization.
Review:
Customer records
Vendor records
Items/products
Chart of accounts
Open transactions
Historical transactions
Addresses
Tax information
Pricing
Inventory
Master data
Look for:
Duplicates
Missing fields
Invalid values
Inactive records
Inconsistent naming
Data cleansing should happen before migration wherever appropriate.
5. Which Systems Need to Integrate?
Build an integration inventory.
Possible systems include:
CRM
E-commerce
Warehouse management
Banking
Payment platforms
HR
Payroll
Business intelligence
Customer portals
Third-party applications
For each system document:
Source
Destination
Data
Frequency
Business owner
Failure impact
This can identify migration dependencies before they become project surprises.
6. Which Reports Are Critical?
Identify reports that management and operations cannot work without.
Examples:
Sales
Inventory
Finance
Profitability
Receivables
Payables
Cash flow
Production
Customer performance
For every important report ask:
Where will this information come from after migration?
Don't wait until after go-live to discover that an old report depended on a legacy database structure.
7. Which Processes Should Change?
Migration creates an opportunity to redesign processes.
Consider:
Current
Manual approval
↓
Email follow-up
↓
Data entry
↓
Report
Future
Digital request
↓
Workflow
↓
Approval
↓
Automatic data update
↓
Dashboard
The objective isn't to copy the old process.
It's to create a better one.
8. Are Your Users Ready?
Technology adoption can determine whether a migration delivers value.
Identify:
Key users
Department owners
Training requirements
Testing groups
Change champions
Documentation requirements
Support requirements
Users should participate before go-live, not only after problems appear.
9. How Will You Measure Migration Success?
Go-live is not the final KPI.
Define measurable business outcomes.
For example:
Area | Possible KPI |
Reporting | Time to produce report |
Data | Data error rate |
Inventory | Inventory accuracy |
Approvals | Approval turnaround |
Operations | Manual processing time |
Integration | Manual data transfers |
Users | Adoption rate |
Finance | Processing cycle time |
These measures give the project a business-oriented definition of success.
Legacy ERP Migration Decision Framework
Once the assessment is complete, consider the available paths.
Optimize
Improve the current environment.
Integrate
Connect systems that currently operate separately.
Automate
Remove repetitive manual activities.
Upgrade
Move to a newer supported environment.
Migrate
Move to a modern ERP platform.
Replace
Choose a different platform when the existing environment cannot reasonably meet business requirements.
The right answer should come from the assessment.
Dynamics NAV to Business Central
For organizations using older Microsoft Dynamics NAV environments, migration planning should include a detailed review of:
Current NAV version
Customizations
Extensions
Integrations
Reports
Master data
Historical data
Business processes
User requirements
Localization requirements
The objective shouldn't be to simply reproduce the legacy environment.
The modernization opportunity is to determine what should be standardized, redesigned, integrated or retired.
ERP Migration Checklist
Before starting the migration, confirm that you have documented:
Business
☐ Migration objectives☐ Business case☐ Success metrics
Processes
☐ Current workflows☐ Pain points☐ Future-state requirements
Data
☐ Data inventory☐ Data quality☐ Migration scope☐ Cleansing plan
Technology
☐ ERP capabilities☐ Customizations☐ Extensions☐ Integration architecture
People
☐ Key users☐ Training☐ Change management☐ Support plan
Go-Live
☐ Testing☐ Cutover plan☐ Backup/recovery☐ Support☐ Post-go-live optimization
Frequently Asked Questions
What is legacy ERP migration?
Legacy ERP migration is the process of moving from an older ERP environment to a modern ERP platform or upgraded environment while transitioning relevant data, processes, integrations and users.
How do I prepare for ERP migration?
Start by assessing business objectives, current processes, data quality, customizations, integrations, reports, users and future requirements.
Should all legacy ERP data be migrated?
Not necessarily. Data should be assessed based on operational, historical, regulatory and business requirements.
Should all ERP customizations be migrated?
No. Each customization should be evaluated to determine whether it is still required or whether standard functionality, configuration, extensions or integration can address the requirement.
What is the biggest ERP migration risk?
There isn't one universal risk. Common challenges include unclear requirements, poor data quality, underestimated integrations, excessive customization and insufficient user readiness.
Is ERP migration only an IT project?
No. ERP migration affects business processes, data, users, reporting and operations, making business involvement essential.
Final Thought
A legacy ERP migration is an opportunity to do more than change software.
It is an opportunity to ask:
What should we keep?
What should we change?
What should we remove?
What should we automate?
What should we integrate?
The best migration isn't necessarily the one that moves the most data or reproduces the most old functionality.
It's the one that creates a better operating environment for the business.
Planning to upgrade or migrate your ERP?
JetBriks can help assess:
✓ Current ERP environment✓ Business processes✓ Data migration requirements✓ Customizations✓ Integrations✓ Reporting✓ Upgrade/migration considerations✓ Post-migration opportunities
Don't migrate your legacy complexity blindly.
JetBriks Technologies
ERP Consulting • ERP Implementation • Migration & Upgradation • Integration • ERP Audit • Business Automation
