STRUCTURE / GOVERNANCE MODEL
A model defines the things governance needs to reason about.
It specifies the objects, their attributes and their relationships: a system has a risk classification; a requirement applies to that system; a control addresses the requirement; evidence supports an assessment; an authorised decision permits an action.
Here, model means a structured representation of governance, not a machine-learning model. It can be maintained in linked registers, a relational database or a graph.
In the release example
System SYS-042 is classified High. REQ-021 applies to SYS-042. CTRL-011 requires an independent review. EVD-102 records the review. DEC-008 records the release determination.
What makes it engineered
Stable identifiers, defined field meanings, relationship constraints, accountable owners and versions make the structure consistent and traversable.