How are Indefinite-Delivery contracts characterized?

Indefinite-Delivery contracts are characterized by their flexible delivery arrangements that allow for an uncertain quantity of supplies or services to be delivered over a specified period. These contracts do not have a fixed quantity; instead, they establish the framework for how and when the government can place orders, accommodating changing needs without requiring a new contract for each order.

This flexibility is critical when the exact quantities and delivery schedules cannot be determined at the outset, making it easier for agencies to manage their procurement needs. It provides a mechanism to order supplies or services as required, ensuring efficiency and adaptability in contracting. As such, this aspect of delivery arrangements is the defining characteristic of Indefinite-Delivery contracts.

The other options focus on aspects that do not adequately capture the essence of Indefinite-Delivery contracts: fixed pricing does not apply since prices can vary; bidding procedures are not unique to these contracts; and exclusivity of bidders is not a typical factor in their structure.