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【ISO 26262】故障分析流程图（Failure Classification Chart）

来源：公众号“汽车功能安全”

2020-09-30

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本图是基于ISO26262-5对于硬件单元发生的故障做了分析，根据各种条件做出判断，最后走到SPF, RF,LF 则会引起系统安全目标失败。

ISO26262的分析更侧重于分析硬件的各种故障，而软件的任何缺陷也就是Bug都是系统级故障，这些是要求完全避免的。这一点也使得ISO26262的方法更容易应用在单纯的硬件模块或者软件相对简单的系统比如单片机，也同样使得ISO26262的量化分析方法较不容易应用于非常复杂的软件。

Failure Classification : ISO26262

1. SPF (Single-point Fault)

There is no safety mechanism and it violates safety goal with single-point fault.

2. RF (Residual Fault)

Since there is a safety mechanism but can not be covered, it violates the safety goal with a single-point fault.

3. MPF (Multiple-point Fault)

By overlapping two independent faults, safety goal is violated for the first time.

4. LF (Latent Fault)

Dual-point faults that can not be detected by a safety mechanism nor perceived by a driver

注：文章转摘自RICOH官网文章，供学习参考！

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