mttf: Mean Time To Failure (MTTF)

In ReliaLearnR: Learning Modules for Reliability Analysis

Mean Time To Failure (MTTF)

Description

For non-repairable items MTTF = total operating time / number of failures. The MTTF is the expected time to the first failure. It is commonly used for non-repairable items. The behavior implemented is the same as mtbf here; keep separate name for semantic clarity.

Usage

mttf(failures, totalTime)

Arguments

failures	Numeric scalar or numeric vector of failure counts (non-negative).
totalTime	Numeric scalar or numeric vector of total operating times.

Value

Numeric scalar: MTTF. If number of failures is zero, returns Inf (with a warning).

Examples

mttf(5, 1000)
mttf(c(2,3), c(500,500))

ReliaLearnR documentation built on May 27, 2026, 5:08 p.m.