import type { NelsonRulesInput, NelsonRulesResult } from './types.js';
/**
 * Nelson Rules for SPC Control Chart Analysis
 *
 * Eight rules to detect non-random patterns in control chart data,
 * indicating special cause variation.
 *
 * @reference Nelson, L.S. (1984). "The Shewhart Control Chart — Tests for Special Causes".
 *            Journal of Quality Technology, 16(4), 237-239.
 * @reference Western Electric (1956). "Statistical Quality Control Handbook".
 *
 * @throws {RangeError} Values array must have at least 1 element
 * @throws {RangeError} Sigma must be a positive number
 */
export declare function nelsonRules(input: NelsonRulesInput): NelsonRulesResult;
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