48 CFR § 19.001 - Definitions.
As used in this part—
Concern means any business entity organized for profit (even if its ownership is in the hands of a nonprofit entity) with a place of business located in the United States or its outlying areas and that makes a significant contribution to the U.S. economy through payment of taxes and/or use of American products, material and/or labor, etc. “Concern” includes but is not limited to an individual, partnership, corporation, joint venture, association, or cooperative. For more information, see 13 CFR 121.105.
Fair market price means a price based on reasonable costs under normal competitive conditions and not on lowest possible cost (see 19.202-6).
Industry means all concerns primarily engaged in similar lines of activity, as listed and described in the North American Industry Classification system (NAICS) manual.
Similarly situated entity means a first-tier subcontractor, including an independent contractor, that—
(1) Has the same small business program status as that which qualified the prime contractor for the award (e.g., for a small business set-aside contract, any small business concern, without regard to socioeconomic status); and (2) Is considered small for the size standard under the NAICS code the prime contractor assigned to the subcontract.