OptionalthresholdThe cumulative-share cutoff on a 0–1 scale. Contributors at or below this
point are classified vital.
OptionalbufferExtra slack added to ParetoOptions.threshold when classifying.
Some methodologies take "the 80% plus one more" — e.g. use 0.005 buffer
to make the effective cutoff 0.805. Defaults to no buffer for an exact split.
Negative values shift the cutoff down.
OptionalalwaysAlways classify the single largest contributor as vital, even if it
alone exceeds the cutoff. Prevents a dominant outlier from being labelled
trivial.
OptionalprecisionDecimal places used when rounding the stored cumulative share.
Options controlling how the Pareto split is computed.