import type { MtbfInput, MtbfResult } from './types.js';
/**
 * Calculate MTBF (Mean Time Between Failures) and related reliability metrics
 *
 * MTBF = Total Operating Time / Number of Failures
 * MTTR = Total Repair Time / Number of Failures
 * Availability = MTBF / (MTBF + MTTR)
 *
 * @param input - MTBF input parameters
 * @returns MTBF analysis result
 * @throws RangeError if totalOperatingTime is not positive, or if
 *   numberOfFailures is not positive (MTBF is undefined with zero failures)
 */
export declare function mtbf(input: MtbfInput): MtbfResult;
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