Best Practices for Epicor to NetSuite Migration for Manufacturers

Key Takeaways

• Start with the manufacturer’s future operating model before mapping Epicor fields or rebuilding existing workflows in NetSuite.
• Clean and classify Epicor data before migration. Also, separate active master data, open transactions, historical records, and information that should be archived.
• Validate manufacturing data at the level of items, BOMs, revisions, routings, work centers, inventory, costing, and production transactions rather than treating migration as a simple database export.
• Rebuild Epicor customizations selectively. BAQs, BPMs, custom reports, and legacy workflows should be evaluated against standard NetSuite functionality before being recreated.
• Test complete manufacturing scenarios from demand and procurement through production, inventory, fulfillment, costing, and financial reporting before cutover.
• Plan integrations, reporting, user training, cutover, and hypercare as part of the migration rather than as activities that happen after the ERP is configured.

Migrating from Epicor to NetSuite is a major ERP transformation for a manufacturer because the move affects much more than financial data. Items, bills of materials, routings, work orders, inventory, purchasing, production costs, open orders, integrations, and reporting all need to work together in the new environment.

A successful migration starts by deciding how the business should operate in NetSuite, then determining which Epicor data, processes, customizations, and integrations are required to support that model.

Oracle NetSuite supports manufacturing through capabilities including bills of materials, work orders, routings, work centers, WIP, production transactions, and planning, with Advanced Manufacturing.

The Advanced Manufacturing module adds capabilities such as work instructions, resource planning, production scheduling, and mobile shop-floor data collection.

Why Manufacturers Move From Epicor to NetSuite

Manufacturers consider an Epicor-to-NetSuite migration when their existing ERP no longer provides the combination of financial visibility, operational flexibility, integrations, and scalability they need.

The reasons vary by business, but common concerns include fragmented reporting, complex customizations, disconnected systems, multi-location operations, manual planning processes, and difficulty supporting growth across entities or facilities.

The migration also creates an opportunity to consolidate processes that have developed separately over time. A manufacturer may have Epicor handling production and inventory while ecommerce, CRM, warehouse systems, EDI, PLM, MES, tax, shipping, or reporting operate in separate applications.

NetSuite brings financials, inventory, procurement, order management, manufacturing, and other business processes into a single cloud ERP environment. However, the benefit depends on how the new system is designed. Simply reproducing every Epicor workflow inside NetSuite transfers the complexity of the old system without addressing the reasons for the migration.

If you are still evaluating the two platforms, a detailed NetSuite vs. Epicor comparison helps clarify the differences in manufacturing capabilities, functionality, and overall ERP fit. 

The better approach is to identify which processes the business needs to preserve, which should be redesigned, and which can be replaced with standard NetSuite capabilities.

1. Start With the Manufacturing Operating Model

Nasir Syed, Head of NetSuite Practice at Folio3, has overseen dozens of NetSuite migrations. He notes that one of the most common migration mistakes is starting with field-by-field data mapping before deciding how manufacturing should operate in NetSuite. c

Before configuration starts, you should document the current and future operating model. This should cover how the manufacturer buys materials, manages inventory, plans production, releases work orders, consumes components, records labor, handles scrap and rework, completes production, ships finished goods, and accounts for manufacturing costs.

For manufacturers, the design discussion should include:

• Manufacturing model, such as make-to-stock, make-to-order, configure-to-order, engineer-to-order, contract manufacturing, or a combination
• Item types and item hierarchy
• Units of measure
• BOM structure and revisions
• Manufacturing routings and work centers
• Production locations
• WIP requirements
• Component issue and backflush rules
• Labor and overhead capture
• Scrap, yield, and production variance
• Inventory costing
• Demand planning and replenishment
• Lot and serial tracking
• Quality requirements
• Outsourced or subcontracted operations
• Intercompany and multi-subsidiary processes

Advanced Manufacturing extends these capabilities with work instructions, resource supply and demand, planned production times, shop-floor data collection, downtime, loss, and labor tracking.

This is why the migration team needs to determine which Epicor manufacturing processes map directly to NetSuite functionality and which require configuration, customization, integration, or a separate manufacturing system.

2. Audit Epicor Before Extracting Data

Epicor environments often contain years of accumulated records, duplicate items, inactive customers and vendors, obsolete BOMs, old reports, custom fields, and processes that are no longer used. Extracting everything and deciding what to do with it later increases the amount of data that has to be cleaned, mapped, tested, and validated.

Create an inventory of the Epicor data and system components that support daily operations.

Master data

For the master data audit, you must review the following information

• Customers
• Vendors
• Items
• Units of measure
• Warehouses and locations
• Bins
• BOMs
• BOM revisions
• Routings
• Work centers
• Employees
• Price lists
• Payment terms
• Chart of accounts
• Tax information

Open operational data

Identify records that must remain active when the business moves to NetSuite, such as:

• Open sales orders
• Open purchase orders
• Open work orders
• Open invoices
• Open vendor bills
• Customer deposits
• Vendor prepayments
• Inventory balances
• Pending transfers

3. Build an Epicor-to-NetSuite Data Mapping Strategy

Epicor data cannot simply be copied into NetSuite because the two platforms use different data models.

This is why the migration needs a mapping document that defines the Epicor source, NetSuite destination, transformation rules, validation requirements, and business owner for each important data group.

For example:

Epicor Data	NetSuite Target	Migration Consideration
Part/item master	Item records	Item type, units, locations, costing
BOM	BOM/Assembly structure	Components, quantities, revisions
Operations	Manufacturing routing	Work centers, resources, sequence
Warehouses	Locations	Subsidiary and inventory structure
Bins	Bin records	Warehouse structure and inventory control
Customers	Customer records	Terms, addresses, credit information
Vendors	Vendor records	Terms, purchasing information
Open sales orders	Sales orders	Status, quantities, pricing
Open purchase orders	Purchase orders	Receipts, quantities, vendors
Open work orders	Work orders	Components, quantities, production status
GL balances	NetSuite financial records	Account mapping and reconciliation
Epicor reports	Saved searches, reports, or workbooks	Rebuild based on business requirements

The mapping should also identify fields that need transformation.

For example, an Epicor item number may need to follow a different naming convention in NetSuite. Units of measure may need conversion. Location structures may need to be redesigned around NetSuite subsidiaries and locations. Status values may also require translation because the same business status can be represented differently in the two systems.

Each critical mapping should have a business owner who can confirm that the resulting NetSuite record behaves correctly.

4. Clean Manufacturing Data Before Migration

Manufacturing data errors have a larger impact than simple master data inconsistencies because a single incorrect component, quantity, unit, or routing step affects production planning and costing.

Start with the item master first.

Look for duplicate items, inactive parts that are still used in production, incorrect units of measure, missing purchasing information, obsolete items, inconsistent descriptions, and items that exist separately for different plants even though they represent the same product.

Then review BOMs and routings. Manufacturers should verify:

• Component quantities
• Units of measure
• BOM revisions
• Effective dates
• Substitute components
• Scrap or yield assumptions
• Operation sequence
• Work centers
• Labor resources
• Machine resources
• Standard or expected production times
• Manufacturing costs

Do not wait until the final migration load to discover that two facilities maintain different versions of the same BOM.

Data owners from operations, manufacturing engineering, inventory, procurement, and finance should approve the cleaned records before they are loaded into NetSuite.

Our data migration experts recommend cleaning data before import and testing CSV imports with a small number of records before running larger loads. We also recommend breaking large CSV jobs into smaller batches and validating imports rather than treating the migration as a single bulk load.

5. Decide What to Migrate, Archive, and Retire

A manufacturer does not need to migrate every record simply because it exists in Epicor. A practical classification is:

Migrate	Archive	Retire
Active customers and vendors	Closed orders	Duplicate records
Current item master	Older production history	Test records
Current inventory	Historical invoices	Obsolete items
Active BOMs and routings	Inactive vendors	Unused custom fields
Open sales orders	Obsolete reports	Reports nobody uses
Open purchase orders	Older attachments	Workflows that no longer represent the business process
Open work orders	Historical records required for reference but not daily operations	Customizations replaced by standard NetSuite functionality
Required financial balances
Required historical data
Required compliance and traceability records

Historical retention should be approved by finance, legal, tax, compliance, and operations where applicable. Manufacturers in regulated industries may have additional requirements for retaining quality, traceability, warranty, or production records.

6. Rebuild BOMs, Routings, and Manufacturing Processes Carefully

For a manufacturer, BOM and routing migration deserves its own validation cycle.

A BOM defines what goes into a finished or intermediate product. A routing defines how that product is produced. Both affect inventory consumption, production planning, labor, machine capacity, WIP, and manufacturing cost.

NetSuite supports BOMs, work orders, routings, work centers, WIP, component issues, completions, and related manufacturing transactions. Advanced Manufacturing extends the production environment with work instructions, production scheduling, resource planning, and mobile shop-floor data capture.

The migration team should validate the complete production lifecycle rather than checking whether the BOM technically imported.

If the Epicor system uses complex production rules, the team should test those rules against actual manufacturing scenarios.

This is particularly important for manufacturers with:

• Multi-level BOMs
• High-volume production
• Engineer-to-order products
• Multiple production facilities
• Lot or serial traceability
• Subcontracted operations
• Significant WIP
• Scrap and yield requirements
• Complex labor or machine costing

7. Evaluate Epicor Customizations Before Rebuilding Them

One of the biggest opportunities in an Epicor-to-NetSuite migration is deciding which customizations are still necessary.

Mature Epicor environments contain BAQs, BPMs, custom reports, custom tables, scripts, fields, approval rules, and other modifications. These should be cataloged before the migration team decides how to reproduce them. A useful classification is:

Replace with NetSuite standard functionality

The business requirement already exists in NetSuite, so no custom development is necessary.

Reconfigure the process

The requirement is valid, but the Epicor workflow was designed around an older operating model.

Rebuild in NetSuite

The requirement remains necessary and cannot be handled through standard configuration.

Retire

The customization exists only because of a historical workaround or process that the business no longer needs.

For example, an Epicor BAQ may become a NetSuite saved search, report, or SuiteAnalytics workbook. An Epicor BPM may be replaced by a NetSuite workflow or script, depending on the requirement.

The objective is to preserve the business requirement rather than reproduce the old technical implementation.

8. Reconcile Manufacturing Costing Before Go-Live

Costing needs to be tested independently from the data migration. A manufacturer should know how material, labor, machine, overhead, WIP, scrap, and finished-goods costs will behave in NetSuite before production starts. Validate at least:

• Inventory valuation
• Standard or other applicable costing methods
• BOM component costs
• Labor costs
• Machine costs
• Overhead
• WIP balances
• Production variances
• Scrap
• Finished-goods costs
• COGS
• Gross margin reporting

Run sample products through both systems and compare the expected results.

The purpose is not necessarily to make Epicor and NetSuite produce identical screens or transactions. In fact, the purpose is to establish that the new system produces financially correct and operationally useful results under the manufacturer’s approved costing model.

9. Rebuild Integrations as Part of the Migration

Integrations should be designed before user acceptance testing. A manufacturer may have Epicor connected to:

• MES
• WMS
• EDI
• Ecommerce
• CRM
• PLM
• Tax software
• Shipping systems
• 3PLs
• Banking platforms
• Payroll and HR
• Business intelligence tools

The migration team should create an integration inventory showing what currently connects to Epicor, what data each system sends or receives, how frequently it moves, which system owns the record, and what should happen when the integration fails.

For each integration, define:

• Source system
• Destination system
• Data exchanged
• Frequency
• Authentication method
• Error handling
• Retry process
• Reconciliation process
• Business owner
• Go-live dependency

This prevents a common problem where NetSuite is fully configured, but the surrounding technology stack is still dependent on Epicor.

10. Redesign Reports Instead of Copying Every Epicor Report

Reporting requirements should be defined early. Start by identifying the reports management and operational teams actually use to make decisions.

For manufacturing, this can include:

• Production output
• Work order status
• Inventory valuation
• Inventory aging
• Material availability
• Purchase requirements
• Production variance
• Labor utilization
• Manufacturing costs
• Scrap
• Sales and margin
• Backorders
• Order fulfillment
• Financial statements

Then, determine how each report should be delivered in NetSuite.

An Epicor report may become a saved search, dashboard, standard report, SuiteAnalytics workbook, or a separate BI report. Some reports may no longer be necessary once data is consolidated.

This is another area where migration should focus on the business requirement rather than reproducing the old system screen for screen.

11. Test With Real Manufacturing Scenarios

Testing should demonstrate that the business can operate in NetSuite, not simply prove that data loaded successfully. A manufacturing test cycle should follow real transactions from start to end.

For example:

1. Create or import demand.
2. Run planning or MRP.
3. Identify material requirements.
4. Create purchase orders.
5. Receive raw materials.
6. Create and release a work order.
7. Issue or backflush components.
8. Record labor or production activity.
9. Record scrap or production variance.
10. Complete the work order.
11. Verify finished-goods inventory.
12. Fulfill the customer order.
13. Generate the invoice.
14. Review inventory and manufacturing costs.
15. Confirm financial reporting.

Do not test only the normal path. Manufacturers should also test exceptions such as:

• Short material
• Partial receipt
• Partial production
• Scrap
• Rework
• Component substitution
• Failed quality inspection
• Inventory adjustment
• Cancelled order
• Production variance
• Failed integration
• Partial shipment
• Backorder
• Returned product

These scenarios reveal problems that a clean demonstration transaction will never expose.

12. Run Multiple Migration Cycles Before the Final Load

A single test migration is rarely enough for a complex manufacturing environment. For Epicor-to-NetSuite migration, your team can run multiple migration cycles.

Phase 1

Focus on extraction, transformation, field mapping, and basic record creation.

Phase 2

Load cleaned master data and open transactions. Reconcile quantities, balances, relationships, and manufacturing structures.

Phase 3

Run the complete migration process using production-like data and execute end-to-end testing.

Final migration

Perform the approved extraction, final transformation, validation, and loading during the cutover window.

13. Plan the Cutover Around Production

For a manufacturer, cutover planning needs to account for production schedules, inventory movements, open work orders, purchasing, shipping, and financial close. The cutover plan should define:

• Final Epicor transaction date
• Transaction freeze window
• Final inventory extraction
• Physical inventory reconciliation where required
• Open work order treatment
• Open sales and purchase order migration
• Final master-data load
• Opening balances
• Integration activation
• User access
• Validation owners
• Go-live approval
• Rollback or contingency procedures
• Hypercare coverage

The sequence matters.

For example, inventory should not be loaded before the team has established which transactions are included in the final inventory position. Similarly, open work orders need a defined treatment so production does not suddenly lose visibility into partially completed jobs.

The final cutover should be rehearsed before the actual go-live.

14. Train Users Around Their Manufacturing Roles

Training should reflect how people actually use the ERP.

A production operator does not need the same training as a manufacturing manager, inventory controller, buyer, accountant, or executive. Role-based training should cover the transactions and decisions each group performs. For example:

1. Production operators: Work order execution, material issue, production reporting, labor, scrap, and completion.
2. Manufacturing managers: Production status, work center capacity, WIP, variance, scheduling, and production reporting.
3. Inventory teams: Receipts, transfers, bin movements, lot and serial tracking, and inventory adjustments.
4. Procurement: Planning recommendations, purchase orders, supplier management, receipts, and material availability.
5. Finance: Inventory valuation, WIP, manufacturing costs, COGS, variances, and financial reconciliation.

15. Establish Hypercare Before Go-Live

In the first few weeks after go-live, production teams often encounter issues that did not appear during testing. A structured hypercare period gives the business a clear path to resolve data problems, transaction issues, integration failures, reporting gaps, and user questions.

Track issues by severity and assign clear ownership. The support team should monitor areas such as:

• Inventory discrepancies
• Failed integrations
• Open transaction errors
• Work order problems
• Production reporting
• Financial reconciliation
• User access
• Reporting accuracy
• Performance issues

At the end of hypercare, unresolved issues should move into an ongoing support and optimization process with documented priorities and owners.

What to do Next?

For manufacturers, the work does not end when the Epicor data is successfully loaded into NetSuite. The new environment still needs to support the production processes, costing structure, inventory controls, and reporting requirements that were defined during the migration.

Folio3 brings this manufacturing experience to NetSuite implementations and migrations. Srixon Sports implementation addressed requirements including custom FIFO costing and multi-entity credit management.

Common Epicor-to-NetSuite Migration Mistakes

Below are common migration issues when moving from Epicor to NetSuite, and it is best to avoid them at all costs.

Migrating Everything

Moving every historical transaction, duplicate record, obsolete item, and unused field creates more work without necessarily creating more value.

Rebuilding Epicor Inside NetSuite

Recreating every Epicor customization can make the new ERP unnecessarily complex. Each customization should be evaluated against the future business process and available NetSuite functionality.

Treating Manufacturing Data Like Financial Data

Items, BOMs, routings, work centers, inventory, and production data require operational validation. A successful financial migration does not mean the manufacturing migration is complete.

Testing Only Individual Transactions

A work order may work correctly in isolation while the complete demand-to-shipment process fails. End-to-end testing is essential.

Leaving Integrations Until the End

If WMS, MES, EDI, ecommerce, PLM, or other systems depend on Epicor, they need to be part of the migration architecture from the beginning.

Ignoring Historical Data Requirements

Some historical records can be archived, but regulated manufacturers and businesses with audit, warranty, quality, or traceability requirements may need specific records to remain accessible.

Giving Data Validation to IT Alone

IT can validate whether a record loaded correctly. The business needs to validate whether the record reflects how the company actually operates.

Epicor to NetSuite Migration Checklist for Manufacturers

Before go-live, confirm that the project team has completed the following:

• Epicor processes and customizations have been inventoried
• Future-state manufacturing workflows have been documented
• Item master has been cleaned and approved
• BOMs and revisions have been validated
• Routings and work centers have been mapped
• Inventory locations and bins have been validated
• Costing requirements have been approved by finance
• Open transactions have been identified
• Historical data has been classified for migration or archive
• Epicor customizations have been evaluated individually
• Required integrations have been mapped
• Critical reports have been redesigned and tested
• Mock migration cycles have been completed
• End-to-end manufacturing scenarios have passed testing
• Exception scenarios have been tested
• Final inventory reconciliation process is documented
• Cutover responsibilities and timing are assigned
• Users have completed role-based training
• Hypercare support is scheduled
• Business owners have approved go-live

What Does a Realistic Migration from Epicor to NetSuite Timeline Look Like?

Most mid-market Epicor to NetSuite migrations run three to six months. Clean data and light customization push a project toward the shorter end. Multiple plants, heavy custom code, multiple currencies, or deep third-party integrations push it toward six to nine months or longer.

A typical phased structure looks like this: initial assessment and future-state design in the first few weeks, system configuration running in parallel with data mapping, testing that starts as soon as configuration stabilizes, training built around real business scenarios, and a hypercare period of several weeks after go-live where the implementation team stays engaged for issues that only surface under real production volume. Waiting for configuration to fully finish before testing starts, or relying on generic screen walkthroughs for training, both slow the project down for no real benefit.

Cutover itself deserves its own checklist, including final data extraction, validation reporting, open transaction reconciliation, inventory balance verification, user access confirmation, and a clear owner for every step. The difference between a clean launch and a disruptive one usually comes down to how much of that checklist got tested in a dry run before the real cutover weekend.

How Folio3 Helps Manufacturers Move From Epicor to NetSuite

An Epicor-to-NetSuite migration requires both ERP migration expertise and an understanding of how manufacturing operations actually work.

Folio3 is an Oracle NetSuite Alliance Partner, and our manufacturing implementation methodology starts by mapping production workflows before configuration, then addresses BOM migration, WIP and routing, demand planning, integrations, and manufacturing-specific validation.

The implementation team also needs to understand how the manufacturer plans production, consumes materials, tracks WIP, calculates costs, manages inventory, and reports production performance.

Folio3’s manufacturing practice includes experience across discrete, process, engineer-to-order, and mixed-mode manufacturing environments. Its current manufacturing implementation work also includes NetSuite configurations for BOMs, WIP and routing, demand planning, quality management, inventory, procurement, and shop-floor processes.

The migration can therefore be approached as a complete manufacturing transformation:

The approach gives manufacturers a structured way to move away from Epicor while preserving the production and financial information the business depends on and removing processes that no longer serve the organization.

Making the Move From Epicor to NetSuite

An Epicor-to-NetSuite migration should be treated as a business transformation with a data migration component, rather than a database replacement.

For manufacturers, the most important work happens around the production model, including items, BOMs, routings, work orders, inventory, costing, integrations, and the transactions connecting them. Cleaning this data early, redesigning outdated processes, testing real manufacturing scenarios, and rehearsing cutover can significantly reduce the operational risk of moving to a new ERP.

The right implementation partner also makes the difference between simply getting NetSuite live and building an ERP environment that manufacturers can operate effectively after go-live.

Folio3’s expert NetSuite team can assess your existing Epicor environment, map manufacturing and financial requirements, plan the data migration, configure NetSuite, build required integrations, and support the transition through go-live and beyond.

Book a call with our experts!

FAQs

How long does an Epicor to NetSuite migration take for a manufacturer? 

Most mid-market projects run three to six months. Multiple plants, heavy Epicor customization, or complex regulatory and lot-tracking requirements extend that toward six to nine months. A single-site manufacturer with clean data and light customization can move faster.

What’s the biggest technical difference between Epicor and NetSuite for manufacturers?

Epicor organizes production around jobs. NetSuite organizes it around work orders tied to assembly items. Every BOM, routing, and WIP decision in this guide traces back to that structural difference.

Should a manufacturer migrate all of its historical Epicor data? 

No. Most manufacturers migrate one to three years of active transaction history and archive the rest in a secure, queryable export. Master data, open transactions, historical records, and compliance documentation each need their own migration decision, and treating them as one blanket export is how detail gets lost.

Do Epicor’s BAQs and BPM rules carry over to NetSuite automatically? 

No. BAQs typically become saved searches or custom reports in NetSuite, and BPM rules become SuiteFlow workflows or custom scripts. Each one needs review for whether it’s still in active use before anyone spends time rebuilding it.

Does Folio3 have experience migrating manufacturers from Epicor to NetSuite?

Folio3 supports Epicor-to-NetSuite migrations as part of its ERP migration services, with a focus on preserving the manufacturing processes and data businesses rely on. Its NetSuite manufacturing team handles requirements across BOMs, routings, WIP, inventory, costing, production workflows, and integrations as part of the migration and implementation process.

For an Epicor migration, this includes assessing the existing ERP environment, determining which data and customizations should move to NetSuite, mapping manufacturing processes to the new system, and validating the migrated environment before go-live.