(1) Anything you produce as an artifact,
(2) In the system context, an item may refer to Hardware, Software, PCBs, etc. (see CLCI)
Airworthiness Certification Services, LLC., provides resources to facilitate DO-254, DO-178C and other safety-critical programs. Our offering includes documentation templates, review checklists, and a tool called PACT that supports all important aspects of DO-254 and DO-178C compliance during project development. Contact us today for a free quote.
For a complete glossary of DO-254 or DO-178C terminology, refer to the appropriate document, which can be purchased at www.rtca.org.