/**
 * Helpers shared by the R10 evaluation pages — kept in `utils` so they can be unit-tested
 * without spinning up a render and reused by both list and detail views.
 */
/** Bucket the pass-rate maps to. Drives the colour of the KPI card. */
export type SuccessTier = 'high' | 'medium' | 'low';
/**
 * Computes the per-evaluation pass rate as a percentage in [0, 100].
 * Returns 0 for an empty dataset (rather than NaN) so callers can render it safely.
 */
export declare function successRatePercent(passedItems: number, totalItems: number): number;
/**
 * Maps a percentage to a colour tier. Thresholds mirror what the KPI card uses to pick its
 * background colour: ≥ 80 = success-bg, ≥ 50 = warning-bg, otherwise error-bg.
 */
export declare function successTier(rate: number): SuccessTier;
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