Concepts

This section explains the conceptual model behind UofA. Read these in order if you are new to the construct.

Topic	What you learn
What a UofA is	The construct itself. One signed package per Context of Use.
C1, C2, C3	Integrity, computable completeness, and quality gates.
Weakeners	The defeater taxonomy and how the rule engine catches credibility gaps.

UofA exists because the credibility frameworks are not the problem. ASME V&V 40, NASA-STD-7009B, and the FDA’s 2023 guidance on CM&S credibility all explain how to assess simulation credibility. The problem is the last mile: there is no standardized construct for packaging, transmitting, and verifying the evidence and decisions those assessments produce. UofA is that construct.