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 -…