How to Validate ERP Data Before Cutover

A successful cutover weekend is defined by data integrity. If your opening balances are wrong, or if inventory is misstated, the entire system is compromised from the first transaction. Here is how our engineering team validates data during a Dynamics 365 or Odoo cutover.

1. Establish the "Source of Truth"

Before the cutover begins, the legacy system must be locked. No new transactions can be entered. At this exact moment, you must generate the definitive reports that will serve as your Source of Truth for validation.

• Detailed Trial Balance
• Accounts Receivable Aging Report
• Accounts Payable Aging Report
• Inventory Valuation Report

2. The Financial Reconciliation Triangle

Once the data is imported into the new ERP, you must reconcile the subledgers to the General Ledger.

3. Spot-Checking Master Data

Financial totals can sometimes mask underlying data issues. You must randomly sample records to ensure data mapped correctly into the specific fields of the new system.

• Customers: Check that default payment terms, tax groups, and currency codes are populated. Missing tax groups will cause the first invoice to error out.
• Items: Verify the Costing Method (FIFO, Standard, Average). Once transactions are posted against an item, changing the costing method is extremely difficult.

4. The Mock Cutover

Never perform a cutover for the first time on Go-Live weekend.

You must perform at least one (ideally two) "Mock Cutovers" during the User Acceptance Testing (UAT) phase. This allows you to time the data extraction, transformation, and import processes, and gives your finance team a dry-run at reconciling the reports.