Major System Law and Legal Definition

Major system means “that combination of elements that will function together to produce the capabilities required to fulfill a mission need. The elements may include hardware, equipment, software, or any combination thereof, but exclude construction or other improvements to real property. A system is a major system if --

(1) The Department of Defense is responsible for the system and the total expenditures for research, development, test, and evaluation for the system are estimated to be more than $ 173.5 million or the eventual total expenditure for the acquisition exceeds $ 814.5 million;

(2) A civilian agency is responsible for the system and total expenditures for the system are estimated to exceed $ 1.8 million or the dollar threshold for a "major system" established by the agency pursuant to Office of Management and Budget Circular A-109, entitled "Major System Acquisitions," whichever is greater; or

(3) The system is designated a "major system" by the head of the agency responsible for the system (10 U.S.C. 2302 and 41 U.S.C. 403).” (48 CFR 2.101)