measure-portfolio-diversity

Purpose

Quantify portfolio diversity and coverage across declared feature, mechanism, domain, or failure-mode dimensions.

Input contract

required: [portfolio, diversity_dimensions, feature_assignments]
optional: [niche_universe, strength_threshold, concentration_measure]
constraints: [niche definitions and distance/overlap rules are explicit]

Procedure

1. Define niches and assign each portfolio member to them.
2. Compute coverage, concentration, and duplication using the supplied measure.
3. Identify empty niches and collapse risks.
4. Return diversity results with sensitivity to assignment uncertainty.

Output contract

produces: [diversity_metrics, niche_coverage, concentration_risks, empty_niches]
delta_fields: [findings, uncertainties, decisions]