What type of purchase order involves sending products at regular intervals?

A standing order is a type of purchase order that involves the supplier delivering products at regular intervals over a specified period. This arrangement is particularly beneficial for businesses that require consistent inventory levels of certain goods, allowing for more efficient inventory management and ensuring that necessary items are always on hand without the need for reordering each time.

In contrast, a one-time order is a single purchase made for immediate needs, and it does not involve periodic delivery. A contingent order is dependent on specific conditions being met before the purchase can be finalized, which doesn’t pertain to regular intervals of delivery. A bulk order, while involving a large shipment of products at once, does not imply any ongoing or scheduled deliveries and is usually a single transaction rather than a recurring one. Therefore, the definition and function of a standing order align perfectly with the concept of sending products at regular intervals, making it the correct choice.