Epistemic Uncertainty — Structural Reference

Orientation

Knowledge about a system, model, parameter, hypothesis, relationship, prediction, or state may remain incomplete.

Such limitations in available knowledge create uncertainty about the represented object without requiring the underlying process itself to be inherently variable.

Epistemic uncertainty concerns this knowledge-dependent uncertainty rather than variability treated as inherent in the represented process.

Problem Space

Knowledge Limitation

Available evidence, observations, assumptions, or model structure may leave relevant aspects of a represented object unresolved.

Uncertainty Object

The unresolved knowledge may concern a state, parameter, model, hypothesis, relationship, prediction, or external condition.

Uncertainty Representation

The resulting uncertainty may be represented explicitly through probability-based, interval-based, ensemble-based, model-based, or qualitative forms.

System Boundary

The epistemic uncertainty boundary separates uncertainty associated with limitations in available knowledge from variability treated as inherent in the represented process.

Within Boundary

Uncertainty is attributable to incomplete, limited, or unresolved knowledge within the represented system or model.

At Boundary

The relation between the current knowledge state, the unresolved object, and the representation of uncertainty is examined.

Outside Boundary

Inherent variability, implementation-specific estimation procedures, and operational decision rules remain outside the reference boundary.

Structure

Context and positioning are described in About.

Formal definition, scope boundaries, and structural models are provided in Method.