A NDI 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. A
non-development item can be used without modification or may be
modified to meet the requirements of this system. The suitability
of a NDI is often assessed early in
the design through the use of an appropriate prototype of
the system or subsystem. While there are considerable advantages to
using a NDI, the systems engineering effort must
ensure that the requirements for reliability, maintainability, robustness, and so
on, are being met.
Other topics in our resources on Systems Engineering related to NDI include: