Data & measurement
Impact scoring combines total impact TI with ceiling-relative indices. Report both raw TI and IS when comparing scenarios. Write explicit operational definitions for each symbol in your protocol, even when abbreviations look standard. Log instrument versions, sample frames, and cleaning rules whenever estimates are refreshed so longitudinal comparisons stay valid.
Solution & proof
Conceptual summary: When cumulative additions cross threshold θ, indicator fires and impact is boosted by β (e.g. 1.5× with β=0.5). Treat this as a measurement recipe: map each symbol to an empirical quantity, substitute estimates, and simplify with ordinary algebra (including logarithms, min/max caps, or piecewise branches where shown). Where limits or integrals appear, approximate with discrete sums on cohorts or time steps when closed forms are impractical. Interpret the result against thresholds in the cited source and report uncertainty on inputs.
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Source & tags
Source
Impact measurement framework — Impact Scoring