Business Event Processing is the use of software to detect, interpret, and respond to significant events generated by business systems. An event might be a customer placing an order, a payment failing, inventory falling below a threshold, or a transaction exceeding a defined limit. The system evaluates these events as they occur and can trigger actions without waiting for a scheduled batch process.
It is particularly useful when timing matters. For example, an online retailer can detect a completed purchase and immediately update inventory, initiate fulfillment, and send a confirmation. Business Event Processing is closely related to Complex Event Processing (CEP), event-driven architecture, and real-time analytics.