Integration-First ERP Selection: The 10 Questions That Prevent Regret
The average MRO organization runs 8 to 14 discrete software systems to manage a single aircraft's operational life, and a mid-size MRO absorbs roughly $2.1 million a year in manual data re-entry costs created by those systems not talking to each other (OxMaint, "API Integration Strategy for Aviation Maintenance Ecosystems"). Aviation IT leaders have taken notice: system integration now ranks as their top operational technology priority (OxMaint). Most ERP selection processes evaluate features, price, and vendor reputation first and ask about integration last — as an implementation detail to sort out after signature. That ordering is backwards. Integration capability determines whether an ERP compounds value across every connected system or becomes one more silo an operator has to work around. Here are the 10 questions that belong at the start of the selection process, not the end.
1. What does the ERP connect to natively, without custom development?
Modern integration approaches increasingly rely on standard REST and OData endpoints rather than bespoke connectors — platforms that integrate with systems like SAP S/4HANA and ECC using standard protocols cover work orders, PM notifications, goods movements, and cost postings without custom ABAP development (OxMaint, "MRO ERP Integration"). Ask the vendor for the exact list of pre-built, standard connectors — not "integration-capable," but named systems it already talks to.
2. What's the real cost and timeline difference between a standard connector and a custom build?
Custom middleware builds for MRO ERP integration typically take 12 to 18 months, compared to 6 to 8 weeks for standard connectors (OxMaint). That gap alone should reorder a shortlist — a platform requiring custom middleware for a core connection (CMMS, parts inventory, flight ops) carries a materially different implementation cost than one shipping the connector out of the box.
3. Can the CMMS and ERP exchange data without a human moving it manually?
APIs are the mechanism that lets a CMMS automatically request parts availability from an ERP, or a health-monitoring platform push sensor alerts directly into work-order generation, without anyone manually moving data between systems (OxMaint). If a vendor's answer to "how does the CMMS talk to the ERP" involves an export/import step or a shared spreadsheet, that's not integration — it's a workaround with a UI.
4. Does the platform support single sign-on and a unified data model?
A typical mid-size airline or MRO provider operates six to twelve distinct software platforms managing different dimensions of the same physical asset across its operational life (OxMaint, "API Integration Strategy for Aviation
Maintenance Ecosystems"). An ERP that adds a thirteenth disconnected system doesn't reduce that fragmentation — it extends it.
5. How does the platform handle EASA Part-IS information security requirements?
EASA's Part-IS regulation mandates a fully implemented, operational Information Security Management System for Part-145 maintenance organizations, CAMOs, and AOC holders as of February 22, 2026 — a deadline that has now passed for most aviation service providers (EASA; Aero Compliance Solutions, "EASA Part-IS Deadlines: 2025 and 2026 Dates Explained"). An ERP with poorly secured or undocumented APIs is now a direct compliance liability, not just a technical one. Ask specifically how the platform's integration layer — not just its core application — meets Part-IS information security obligations.
6. What happens to historical data during migration, and who owns it after the contract ends?
Data migration is where integration promises are tested first. Confirm the vendor's process for migrating technical records, historical work orders, and compliance documentation from the incumbent system, and confirm in writing that the operator retains full ownership and export rights to that data regardless of whether the relationship continues.
7. Does the vendor publish API documentation, or do you have to request it deal by deal?
A platform confident in its integration architecture publishes its API documentation openly. A platform that treats API access as a negotiated add-on is signaling that integration was not a design priority — it's a retrofit.
8. How does the ERP handle real-time versus batch data sync?
Some integrations sync nightly; others are real-time. For AOG situations, parts availability, and flight-ops handoffs, batch sync introduces a lag that can cost hours of turnaround time. Ask which specific data flows are real-time and which are batch, and confirm that matches operational reality, not marketing language.
9. Who is accountable when an integration breaks?
Multi-system environments create ambiguous failure ownership. Get a specific answer, in the contract, about support response time and accountability when a connector between the ERP and a third-party CMMS, parts-locator, or flight-ops tool fails.
10. Can the platform scale its integrations as the operation adds systems?
An operator's software stack grows — a new health-monitoring tool, a new parts marketplace connection, a new compliance platform. Ask whether the ERP's integration architecture is built to add connections incrementally, or whether every addition resets the clock to a multi-month custom build.
Why this matters more in 2026 than it did five years ago
Aviation IT organizations are consolidating around API-first architecture specifically because the alternative — custom middleware for every connection — no longer scales against the number of systems a modern MRO or fleet operator runs (OxMaint). At the same time, Part-IS has moved information security from a best practice to a binding regulatory requirement for the majority of aviation service providers as of this year. An ERP evaluated purely on functional checklists, without these 10 integration questions answered in writing, is being selected for today's requirements — not for the operation it will actually need to support in three years.
The Aero NextGen take
Integration capability is not a technical footnote to ERP selection — it is the single factor that determines whether an ERP investment compounds in value or becomes another disconnected system an operator has to manage around.
“Operators don't regret the ERP they chose because of its feature list. They regret it because nobody asked, before signing, how it actually connects to everything else they run. Integration-first selection isn't a nice-to-have step — it's the difference between an ERP that pays for itself and one that just adds a thirteenth system to the pile.”
— Monica Badra, Founder & CEO, Aero NextGen
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Sources
- OxMaint, "API Integration Strategy for Aviation Maintenance Ecosystems" — https://oxmaint.com/industries/aviation-management/api-integration-strategy-aviation-maintenance-ecosystems
- OxMaint, "MRO ERP Integration | Connect SAP, Oracle & CMMS for Aviation" — https://oxmaint.com/industries/aviation-management/mro-erp-integration-aviation
- EASA, "Information Security (Part-IS)" — https://www.easa.europa.eu/en/the-agency/faqs/information-security-part
- Aero Compliance Solutions, "EASA Part-IS Deadlines: 2025 and 2026 Dates Explained" — https://www.aerocompliancesolutions.com/faq-items/what-were-the-easa-part-is-deadlines/
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Aero NextGen matched us to the right solution providers that helped us standardize the data in such a way that we can now put it to use. Aero Nextgen’s ability to quickly understand the business needs and translate them into tangible solutions was impressive.
Aero NextGen matched us to the right solution providers that helped us standardize the data in such a way that we can now put it to use. Aero Nextgen’s ability to quickly understand the business needs and translate them into tangible solutions was impressive.
Aero NextGen matched us to the right solution providers that helped us standardize the data in such a way that we can now put it to use. Aero Nextgen’s ability to quickly understand the business needs and translate them into tangible solutions was impressive.
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