Which method of source selection involves sealed bids?

The method of source selection that involves sealed bids is known as competitive sealed bids. This process is characterized by the public invitation for bids where suppliers submit their proposals in a sealed envelope, ensuring confidentiality until the bids are opened. The advantage of this method lies in its structured approach, which promotes transparency and fairness in the procurement process.

Competitive sealed bids typically include a clear set of specifications that the bidders must adhere to, allowing for an objective comparison of bids based solely on price and compliance with the established criteria. This method is particularly effective for projects where the scope is well-defined, enabling efficient selection of a contractor who can meet the project's needs at the best price.

In contrast to the other methods listed, such as informal quotations, direct negotiation, or cooperative agreements, competitive sealed bids are formal and provide a higher level of control and accountability over the procurement process. Informal quotations typically do not require sealed submissions and are less regulated, while direct negotiation often hinges on discussions rather than sealed offers. Cooperative agreements may involve shared resources or joint procurement efforts but do not usually rely on a sealed bidding format.