The process of inviting and obtaining bids from competing sources in response to advertised competitive specifications, by which an award is made to the lowest and best bidder meeting the specifications. The process contemplates giving potential bidders a reasonable opportunity to bid, and requires that all bidders be placed on the same plane of equality. Each bidder must bid on the same advertised specifications, terms, and conditions in all the items and parts of a contract. The purpose of competitive bidding is to stimulate competition, prevent favoritism, and secure the best goods and services at the lowest practicable price, for the benefit of the state. Competitive bidding cannot occur where contract specifications, terms, or conditions prevent or unduly restrict competition, favor a particular vendor, or increase the cost of goods or services without providing a corresponding benefit to the state.