What is ERP?
A plain-English breakdown of enterprise resource planning — what it actually automates, where the term came from, and where facility operations fit inside it.
Enterprise Resource Planning (ERP) is the umbrella term for software that runs the core operational and financial processes of a business — finance, procurement, inventory, human resources, and increasingly, facility and asset operations — from one connected system instead of a stack of disconnected tools.
Where the term came from
ERP grew out of manufacturing software from the 1970s–80s: Material Requirements Planning (MRP) for scheduling production, then Manufacturing Resource Planning (MRP II) for tying that to broader operations. Analysts coined "ERP" in the early 1990s once the same idea — one connected system of record — started spreading well beyond the factory floor into finance, HR, and order processing. Adoption accelerated sharply through the late '90s, partly because many companies used the Y2K deadline as the trigger to finally replace aging systems. By the 2000s, a second wave — sometimes called "ERP II" — pushed ERP from a purely internal, back-office tool into something employees, suppliers, and partners could reach over the web in real time.
The core idea: one system of record
Before ERP existed as a category, each department kept its own records: finance in one ledger, purchasing in another spreadsheet, maintenance logs on paper in a site office. Reconciling those records at month-end was manual, slow, and error-prone, because no two systems agreed on the same numbers in real time. An ERP platform replaces that patchwork with a shared database. A finance/accounting module is generally considered the one non-negotiable core of any real ERP — everything else (HR, manufacturing, order processing, supply chain, project management, CRM) sits around that shared financial spine.
Where facility management fits
Facility and property operations have historically sat outside traditional ERP — run instead on spreadsheets, WhatsApp groups, and paper registers. That's changing: modern facility platforms like Firmity now cover the same ground a classic ERP module does (procurement, inventory, payroll, expense approvals) but built around the actual unit of work in a building — a work order, an asset, a visitor, a complaint — rather than a generic accounting transaction.
That's the shift worth understanding: ERP isn't just a finance system anymore, and it's now a multi-tens-of-billions-of-dollars global software category. It's whatever system holds your organization's single source of truth — and for facility-heavy businesses, that increasingly means a platform built for buildings first.
More guides
How cloud ERP differs from the on-premise systems it's replacing, and why the shift has become the default rather than the exception.
Why larger, multi-site organizations often run a corporate ERP at headquarters alongside a lighter, faster system at each site or subsidiary.
The recurring reasons organizations move to ERP — fewer disconnected systems, faster decisions, and a cleaner audit trail.