Negotiation
Negotiation comes from the Latin neg (no) and otsia (leisure) referring to businessmen who, unlike the patricians, had no leisure time in their industriousness; it held the meaning of business (le négoce in French) until the 17th century when it took on the diplomatic connotation as a dialogue between two or more people or parties intended to reach a beneficial outcome over one or more issues where a conflict exists with respect to at least one of these issues. Thus, negotiation is a process of combining divergent positions into a joint agreement under a decision rule of unanimity.
Procurement
Procurement is the process of finding, agreeing terms and acquiring goods, services or works from an external source, often via a tendering or competitive bidding process. The process is used to ensure the buyer receives goods, services or works at the best possible price, when aspects such as quality, quantity, time, and location are compared. Corporations and public bodies often define processes intended to promote fair and open competition for their business while minimizing risk, such as exposure to fraud and collusion.