### 2.2.2. Failure Mode Measures

Three failure mode measures are available:

- IRF = Inverse Reserve Factor (IRF) defines the inverse margin to failure. Load divided with IRF is equal to the failure load. IRF >1 discloses failure.

- MoS = Margin of Safety (MoS) defines the margin to failure. MoS is defined as (1/IRF - 1). MoS < 0 discloses failure.

- RF = Reserve Factor (RF) defines the margin to failure. Load multiplied with RF is equal to the failure load. RF < 1 discloses failure.

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