Order Management System

Overview

An Order Management System (OMS) handles the full order lifecycle from placement to delivery: routing orders to the right fulfillment source (own warehouse, 3PL, or dropship supplier), splitting orders when items must ship from multiple locations, handling backorders, and maintaining a complete audit trail. For most merchants, platform-native features plus a shipping app cover 80–90% of OMS needs. A custom OMS is warranted when you have multiple fulfillment locations, complex routing rules, or are building a platform for other brands.

When to Use This Skill

• When your order volume has outgrown a single-warehouse workflow and you need multi-location routing
• When orders that mix in-stock and out-of-stock items need to ship in separate shipments without blocking fulfillment
• When integrating multiple fulfillment sources (own warehouse, 3PLs, dropship suppliers) into a unified routing engine
• When building the core order processing pipeline for a new platform that will support high order volume
• When you need a complete audit trail of every order state change for customer service and finance

Core Instructions

Step 1: Determine your platform and choose the right OMS approach