Picking the wrong ERP integration partner for a retail business doesn't just waste a budget — it stalls the merchandising calendar, breaks POS-to-inventory sync during a peak season, and leaves finance reconciling by hand for months. This checklist gives retail leaders and IT buyers a structured set of questions to put in front of every vendor before signing, so the fit gets tested before the contract does.

Who this is for: retail and multi-channel ecommerce operators evaluating an ERP integration partner for a first implementation, a re-platform, or an integration retrofit onto an existing ERP.

Before You Start: Scope Your Own Requirements

  • [ ] List every system that has to talk to the ERP: POS, ecommerce platform, WMS, 3PL/shipping, payroll, CRM, BI/reporting.
  • [ ] Decide which processes are non-negotiable (inventory sync frequency, order-to-cash, returns) versus nice-to-have.
  • [ ] Set a realistic budget range that includes software, implementation, data migration, training, and a 15-20% contingency.
  • [ ] Identify your internal project owner — a partner-led project with no internal DRI runs into decision bottlenecks almost immediately.

Sector Experience and Track Record

  1. Have you implemented ERP integrations for retail or multi-channel ecommerce businesses specifically — not just manufacturing or services?
  2. Can you share two or three reference clients of similar size and complexity, and can we talk to them directly?
  3. What retail-specific workflows have you built before: real-time inventory sync across channels, POS reconciliation, promotions/pricing rules, marketplace order ingestion?
  4. What's your average project timeline and how often do retail projects run over that estimate?

Integration Architecture and Technical Fit

  • [ ] What integration methods do you support — native connectors, REST/GraphQL APIs, middleware (iPaaS), or file-based batch transfer?
  • [ ] How will you connect our specific stack (name your POS, ecommerce platform, WMS, and payment processor)?
  • [ ] How do you handle real-time vs. batch sync, and what's the expected latency for inventory updates across channels?
  • [ ] What's the error-handling and retry strategy when a sync fails mid-transaction — how do we get alerted, and how is data reconciled afterward?
  • [ ] Who owns the integration code and configuration after go-live — is it portable if we switch partners later?

Data Migration

  • [ ] What's your process for cleaning and mapping legacy data (SKUs, customer records, historical orders) before cutover?
  • [ ] How do you handle data validation and reconciliation post-migration — what percentage discrepancy is considered a pass?
  • [ ] What's the rollback plan if migration fails partway through?

Cost, Contract, and Total Cost of Ownership

  • [ ] Is pricing fixed-fee, time-and-materials, or milestone-based, and what triggers a change order?
  • [ ] What's included in the quoted price versus billed separately — training, post-launch support, custom reports, future connector maintenance?
  • [ ] What's the realistic five-year total cost, including license/subscription fees, annual maintenance, and internal team time?
  • [ ] What happens if the project runs over the estimated timeline — is that on us or the partner?

Support, Training, and Ownership After Go-Live

  • [ ] What does post-launch support look like in the first 30/60/90 days, and what's covered under the base contract versus billed hourly?
  • [ ] Who trains our staff, and is training role-specific (finance, warehouse, store ops) or generic?
  • [ ] What's the SLA for critical issues during peak retail periods (Black Friday, holiday season)?
  • [ ] If the relationship ends, do we retain full documentation, credentials, and integration code?

Red Flags to Watch For

Vendors who can't name a retail-specific reference client, who quote a single number with no breakdown of what's included, who are vague about who owns the integration code after go-live, or who can't clearly explain their error-handling approach for failed syncs are worth a second look before signing anything.

How to Use This Checklist

Send this list to every vendor on your shortlist as part of the RFP, and score responses on completeness and specificity rather than just price. A partner who answers integration and data-migration questions in detail, with named examples, is showing you how the actual project will run — vague answers here tend to predict vague delivery later.