How MISI was constructed

The Munimetric Infrastructure Stress Index is a deterministic, threshold-based 0–100 composite. Higher means more stress under a particular version’s definitions. It is not an objective measure of physical condition or a credit rating.

Source and transformation layers

1. Measured source records are normalized with as-of dates and provenance.
2. Munimetric-derived factor rules assign bounded contributions where data is available.
3. Five family totals sum to the MISI headline score.
4. Peer percentiles and confidence provide context; they do not directly alter the deterministic total.
5. Retrospective findings interpret the frozen record with stated limitations.

Versions and uncertainty

The preserved v0.1.2 publication describes frozen-reference variance weighting and a single-factor concentration guardrail. Historical records retain original version labels. The precise activation/public-live sequence remains partly uncertain.

Published methodology record: v0.1.2 DOI 10.5281/zenodo.19770285; all-versions DOI 10.5281/zenodo.19595312.