Final answer:
A state event in business triggers a change within the system, such as when the inventory reorder point is reached and initiates automatic reordering.
Step-by-step explanation:
The question concerns identifying a state event within a business context. A state event is a situation or point in time that triggers a change in the state of a system. From the given options, the one that most accurately represents a state event is when the inventory reorder point is reached. This is because the inventory level reaching a certain point is a condition that automatically triggers the need for action, specifically reordering additional stock. The other options (a customer placing an order, sending a late notice, and management checking order status) are actions or processes rather than event-driven shifts in state that require immediate response or change.
For example, when the inventory of a product drops to the reorder level, this acts as a signal that more inventory needs to be procured to avoid stockouts. Unlike periodic inventory systems, this event-driven approach responds to actual inventory levels, making it a critical component of just-in-time (JIT) inventory systems and inventory management best practices.