the appropriate use of rapid acquisition methods, including the use of exceptions to competition requirements under sections 3201 through 3205 of this title, sealed bidding, letter contracts, indefinite delivery-indefinite quantity task orders, set asides under section 8(a) of the Small Business Act (
15 U.S.C. 637(a)), undefinitized contract actions, and other tools available to expedite the delivery of goods and services during combat operations or post-conflict operations;