ERP Vendor Selection Checklist

Why ERP Integration Is the Hardest Part of Post-Acquisition Operations

When a private equity firm acquires a company, the 100-day plan almost always includes systems integration. But ERP integration is routinely underestimated — in both complexity and timeline. Companies that treat it as a technical project rather than an operational transformation project consistently run into the same problems: data loss, reporting gaps, duplicate records, and staff who revert to spreadsheets because the new system was never properly implemented.

This checklist is built from over 500 Acumatica ERP implementations across PE-backed portfolio companies. It covers every phase from pre-close planning through post-go-live stabilization.

Phase 1: Pre-Close Planning (60–30 Days Before Close)

Systems Inventory

Document every system the target company uses — ERP, CRM, payroll, inventory, e-commerce, and reporting tools. Identify integration dependencies and data flows between systems. Flag any legacy systems that will require custom migration work.

Data Assessment

Request a full data export from the target's current ERP before close. Assess data quality across customers, vendors, chart of accounts, open transactions, and historical records. Define your data migration scope — what transfers, what stays behind, what gets archived.

Chart of Accounts Alignment

If you are integrating into an existing platform portfolio, map the target's chart of accounts to your standard structure now. This is the single most time-consuming step if left until after close.

Phase 2: Implementation Setup (Close to Day 30)

Configure the New Environment

Provision the Acumatica tenant, configure company settings, define fiscal periods, and set up user roles and permissions. Establish the integration environment for any connected systems — payroll, banking, inventory, e-commerce.

Migrate and Validate Data

Execute the data migration in a staging environment first. Validate record counts, opening balances, and transaction history. Run parallel reporting in both systems before cutover to identify discrepancies.

Train Key Users

Train finance, operations, and any department heads who will use the system daily. Do not train everyone at once. Train the power users first, then cascade training through their teams in the two weeks before go-live.

Phase 3: Go-Live and Cutover (Day 30–60)

Cutover Weekend Checklist

Freeze transactions in the old system. Run final data migration. Validate opening balances. Enable user access. Brief all staff on the new workflows. Assign a dedicated support contact for the first week post-go-live.

Parallel Running Period

Run both systems in parallel for at least one full reporting period. This catches any migration gaps before they affect month-end close or investor reporting.

Phase 4: Stabilization (Day 60–100)

First Month-End Close

The first month-end close in the new system is always the hardest. Plan for it to take 50% longer than normal. Have your implementation partner available during that week. Document every issue that comes up — most of them are configuration adjustments, not data problems.

Reporting Validation

Validate that all management reports, investor reports, and operational dashboards are producing accurate output. Compare against the prior system for at least two periods before decommissioning the old platform.