Method — Bias Testing

Identity

Bias testing describes the process by which a system, model, dataset, or decision procedure is examined for systematic differences in treatment, performance, or outcomes across defined groups, conditions, or input categories.

It links observed system behavior, evaluation criteria, and comparison logic to the identification of asymmetries that may affect fairness, reliability, or representational balance.

This reference defines bias testing as a structural evaluation process independent of specific technologies, vendors, or regulatory interpretations.

Scope Boundary

Included

• Testing for systematic performance differences across groups or categories
• Evaluation of disparate outcomes or error distributions
• Comparative assessment of model, dataset, or system behavior
• Detection of representational imbalance affecting results
• Linking observed disparities to defined testing conditions

Excluded

• General quality assurance without bias-specific comparison logic
• Normative fairness judgments beyond structural testing scope
• Vendor-specific implementation approaches
• Regulatory classification or compliance interpretation
• Operational deployment or governance design

Structural Phase Model

Phase 1 — Test Framing

The system, model, dataset, or procedure under review is defined together with the comparison groups, input categories, or evaluation conditions relevant for testing.

Phase 2 — Outcome Observation

Outputs, errors, decisions, or performance measures are collected across the defined conditions to establish an observable basis for comparison.

Phase 3 — Disparity Assessment

Observed results are evaluated for systematic differences in treatment, accuracy, error rates, or other relevant measures across the defined categories.

Phase 4 — Bias Output

The identified disparities are recorded, classified, or reported as structural findings for downstream interpretation, remediation, or governance processes.

Interpretation Constraint

This reference provides structural terminology and conceptual boundaries only. It does not define implementation methods, regulatory requirements, or legal interpretations.