Methodology status
Version 1.0.0-candidate.1 · Candidate methodology. Prepared November 11, 2026. Research approval and sufficient verified evidence are required before the first national score.
The index is an institutional preparedness benchmark. It is not a probability, a federal safety standard, or a guarantee of resilience. The United States scope generally covers the 50 states and District of Columbia; some indicators use expressly disclosed survey populations or global proxies. Territories are not silently treated as covered.
How the calculation works
Each indicator is normalized to a 0–100 scale. Higher always means stronger readiness. Bounds below are Sky Fall Institute policy anchors unless a documented source explicitly specifies otherwise; they are not empirically validated crisis-survival thresholds.
Indicator score = clamp(100 × (value − worst) ÷ (best − worst), 0, 100)
Category score = sum(indicator score × within-category weight)
National score = sum(category score × category weight)
The ten national category weights total 100%. All indicators within a category have equal weight. Full precision is used until the final result is rounded to one decimal place. Weekly change is the difference between unrounded national scores, rounded to one decimal percentage point, so it may differ slightly from subtracting the two displayed scores.
When publication is blocked
All 40 indicators must have verified, fresh, sufficiently representative evidence. Missing values are not replaced by zero, carried beyond their freshness limit, or imputed. Category weights are not redistributed. Methodology approval and a named editorial review are separate gates.
Research sources can have annual, monthly, weekly, or event-driven releases. Every approved observation retains its reference period, source publication date, retrieval date, evidence checksum, definition, and review. The weekly report date is a calculation/reporting date, not the measurement date of every input.
Comparisons, retention, and revisions
Wednesday reports compare only with an approved report exactly seven days earlier under the same methodology. Missing weeks remain gaps. A new observation and a revision to the same observation period are labeled separately. Publication revisions preserve prior decisions and report editions in the historical export; a withdrawal is logged and does not restore an older edition automatically.
Research runs every Wednesday at 9:11 AM America/New_York, beginning November 18, 2026. If a new assessment cannot be verified, the last approved score remains visible with its original publication date and a no-new-assessment notice; it is never relabeled as newly updated. First publication, the initial methodology and workflow, and material methodology changes require executive approval. A movement of five or more percentage points requires additional validation and executive review before publication. After initial approval, routine validated reports may be published automatically. Email and social communications are prepared for review, not sent automatically.
Limits and uncertainty
Survey margins of error, nonresponse, reporting changes, unequal geographic coverage, and correlations between categories limit interpretation. The model mixes stocks of capacity with operational proxies. It does not currently publish a statistical confidence interval or label small changes statistically significant. Ranking, thresholds, sensitivity analysis, and external research validation must be reviewed before approval. Global supply-chain pressure is a proxy and does not measure every domestic dependency. Incident counts alone do not measure cyber readiness; program guidance alone does not establish operational capability.