Which method of source selection is preferred for its formal bidding process?

The preferred method of source selection for its formal bidding process is competitive sealed bids. This approach ensures transparency and fairness in the procurement process by requiring that all bids be submitted in a sealed format, which helps to prevent any tampering or unfair influence.

Competitive sealed bids involve a public advertisement of the project, allowing vendors to submit their bids in response. This method not only promotes competition among bidders but also provides a clear and systematic way to evaluate bids based on predetermined criteria. By adhering to strict guidelines, it ensures that the process is conducted in a manner that is accountable and can withstand scrutiny.

In contrast, other methods like state cooperative and informal quotations may not involve the same level of formality or competitive rigor. Direct negotiation is typically less structured, allowing for more flexibility but reducing the level of competition and transparency compared to competitive sealed bids. Therefore, for those seeking a rigorous, transparent, and equitable process, competitive sealed bids is the preferred choice.