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.