# What is ERP – Enterprise Resource Planning?

What is ERP – Enterprise Resource Planning? A central system for managing all business activity: finance, procurement, inventory, HR, production.

## How it works in practice

An ERP is the backbone of a mature business. Without one: accounting runs in a spreadsheet, the warehouse uses a separate WMS, marketing uses a separate CRM — and nothing talks to anything else. With one: every department sees real data in real time.

## Related metrics

- OMS — an ERP sometimes includes an OMS
- WMS — the ERP syncs with the WMS
- Accounting — the ERP includes a financial module
- Cash Flow — the ERP generates cash-flow reports

## Common misconception

'Every serious business needs an ERP.' A traditional ERP (SAP, NetSuite) costs $3,000-28,000/year plus implementation. Stores under $1.5M annually are fine with Shopify plus QuickBooks plus an inventory tool. An ERP is a scaling tool, not a starting point.

## How to fix it

ERP not performing as expected? (1) Check whether the store integration works correctly (Shopify/WooCommerce connector), (2) check whether data syncs in real time, (3) check whether the team was trained — an ERP without training is an underused tool.

## Real-world example

A sports retail chain grew from $2.2M to $9.7M a year, with 3 warehouses, 5 marketplace sellers, and 200+ suppliers. Managing it in spreadsheets became chaos. Implementing NetSuite took 6 months and cost $50K. Result: inventory errors fell 95%, and closing the books went from 2 weeks to 2 days.

## Where to start

Consider an ERP once you exceed $1.5M+ in annual sales with operational complexity. Before that: Shopify plus QuickBooks/Xero plus an inventory tool. ERP implementation takes 6-18 months — plan ahead.

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Category: Operations · From the [Jimmy OS KPI Glossary](https://jimmy-os.com/glossary/kpi.md) · Source page: https://jimmy-os.com/glossary/kpi/erp-enterprise-resource-planning