1. A collection of hardware and software components organized to accomplish a specific function or set of functions.
2. A combination of inter-related items arranged to perform a specific Function(s).
Note that in PACT, a System is represented as a “Project.”

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