Systems Engineering Glossary

Need Statement.  The need statement is a concise statement of need describing the goals or objectives of the system development.

Non-Developmental Item (NDI).  A non-developmental item incudes any item that does not require development as part of the Acquisition Phase for this system development because it already exists, as a commercial off-the-shelf product, or as a product developed for another system.

Non-Functional Requirement.  While a functional requirement defines the services and functions that the system should provide, a non-functional requirement describes the qualities or attributes that it must posses.

To suggest other terms to improve these glossaries, please contact Argos Press. Please also contact Argos Press Pty Ltd for information on licensing Argos Press content (for example this glossary entry on Systems Engineering). © Argos Press Pty Ltd, Canberra, 2003-2004. All rights reserved.

Our other resources include Antennas, Appliances, Broadband Internet, CDMA, Communications Systems, GSM, Modems, Project Management, Radar, Risk Management and Decision Making, Satellite Communications, SMS, Speakers, Systems Engineering, Team Building, Time Management, Transmitters and Receivers, and XML.