Editing Systems engineering (section)

===System===
{{Main|System}}
There are many definitions of what a [[system]] is in the field of systems engineering. Below are a few authoritative definitions:

* [[ANSI]]/[[Electronic Industries Alliance|EIA]]-632-1999: "An aggregation of end products and enabling products to achieve a given purpose."<ref>{{cite web|title=Processes for Engineering a System|url=http://webstore.ansi.org/RecordDetail.aspx?sku=ANSI%2fEIA-632-1999|year=1999|publisher=[[Electronic Industries Alliance]]|language=en|access-date=17 June 2018|archive-date=5 July 2010|archive-url=https://web.archive.org/web/20100705203209/http://webstore.ansi.org/RecordDetail.aspx?sku=ANSI%2fEIA-632-1999|url-status=dead}}</ref>
* [[Defense Acquisition University|DAU]] Systems Engineering Fundamentals: "an integrated composite of people, products, and processes that provide a capability to satisfy a stated need or objective."<ref>{{cite web|url=https://ocw.mit.edu/courses/aeronautics-and-astronautics/16-885j-aircraft-systems-engineering-fall-2005/readings/sefguide_01_01.pdf|title=Systems Engineering Fundamentals|website=OCW.MIT.edu|date=January 2001}}</ref>
* [[IEEE]] Std 1220-1998: "A set or arrangement of elements and processes that are related and whose behavior satisfies customer/operational needs and provides for life cycle sustainment of the products."<ref>{{cite web|title=Standard for Application and Management of the Systems Engineering Process|url=http://standards.ieee.org/reading/ieee/std_public/description/se/1220-1998_desc.html|archive-url=https://web.archive.org/web/20090801062355/http://standards.ieee.org/reading/ieee/std_public/description/se/1220-1998_desc.html|archive-date=2009-08-01|url-status=dead|publisher=IEEE|language=en}}</ref>
* INCOSE Systems Engineering Handbook: "homogeneous entity that exhibits predefined behavior in the real world and is composed of heterogeneous parts that do not individually exhibit that behavior and an integrated configuration of components and/or subsystems."<ref>{{cite web|title=Systems Engineering Handbook|url=http://www.incose.org/ProductsPubs/products/sehandbook.aspx|volume=3|year=2007|issue=1 |url-status=dead|publisher=[[INCOSE]]|access-date=10 July 2009|archive-date=18 March 2015|archive-url=https://web.archive.org/web/20150318022214/http://www.incose.org/ProductsPubs/products/sehandbook.aspx}}</ref>
* INCOSE: "A system is a construct or collection of different elements that together produce results not obtainable by the elements alone. The elements, or parts, can include people, hardware, software, facilities, policies, and documents; that is, all things required to produce systems-level results. The results include system-level qualities, properties, characteristics, functions, behavior, and performance. The value added by the system as a whole, beyond that contributed independently by the parts, is primarily created by the relationship among the parts; that is, how they are interconnected."<ref>{{cite web|title=A Consensus of the INCOSE Fellows|url=http://www.incose.org/practice/fellowsconsensus.aspx|year=2006|url-status=dead|publisher=[[INCOSE]]|access-date=10 July 2009|archive-date=29 October 2006|archive-url=https://web.archive.org/web/20061029124419/http://g2sebok.incose.org/app/mss/menu/index.cfm}}</ref>
* [[ISO/IEC]] 15288:2008: "A combination of interacting elements organized to achieve one or more stated purposes."<ref>{{cite web|title=Systems and software engineering - System life cycle processes|url=http://www.15288.com/|year=2008|url-status=dead|access-date=10 July 2009|archive-date=6 August 2019|archive-url=https://web.archive.org/web/20190806051950/http://www.15288.com/}}</ref>
* [[NASA]] Systems Engineering Handbook: "(1) The combination of elements that function together to produce the capability to meet a need. The elements include all hardware, software, equipment, facilities, personnel, processes, and procedures needed for this purpose. (2) The end product (which performs operational functions) and enabling products (which provide life-cycle support services to the operational end products) that make up a system."<ref>{{cite book|title=NASA Systems Engineering Handbook|id=NASA/SP-2007-6105|publisher=[[NASA]]|date=2007|url=https://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20080008301_2008008500.pdf}}</ref>