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Improving failure analysis efficiency by combining FTA and FMEA in a recursive manner

机译：通过以递归方式结合FTA和FMEA来提高故障分析效率

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摘要

When designing a maintenance programme for a capital good, especially a new one, it is of key importance to accurately understand its failure behaviour. Failure mode and effects analysis (FMEA) and fault tree analysis (FTA) are two commonly used methods for failure analysis. FMEA is a bottom-up method that is less structured and requires more expert knowledge than FTA, which is a top-down method. Both methods are time-consuming when applied thoroughly, which is why in many cases, they are not applied at all. We propose a method in which both are used in a recursive manner: First, a system level FTA is performed, which results in a set of failure modes. Using FMEA, the criticality of the failure modes is assessed in order to select only the critical system level failure modes. For each of those, a function level FTA is performed, followed by an FMEA. Finally, a component level FTA and FMEA are performed on the critical function level failure modes. We apply our method to a recently developed additive manufacturing system for metal printing, the MetalFAB1 of Additive Industries (Al), and find that the engineers at Al consider the method to be efficient and effective. (C) 2017 Elsevier Ltd. All rights reserved.
机译：在设计基本商品（尤其是新商品）的维护程序时，准确了解其故障行为至关重要。故障模式和影响分析（FMEA）和故障树分析（FTA）是两种常用的故障分析方法。 FMEA是一种自下而上的方法，与自上而下的方法相比，FTA的结构较少，需要更多的专家知识。彻底应用这两种方法都非常耗时，这就是为什么在许多情况下根本不应用它们的原因。我们提出一种以递归方式使用两者的方法：首先，执行系统级FTA，这会导致一组故障模式。使用FMEA，评估故障模式的重要性，以便仅选择关键的系统级故障模式。对于其中的每个功能，均执行功能级别FTA，然后执行FMEA。最后，在关键功能级别故障模式下执行组件级别的FTA和FMEA。我们将我们的方法应用于最近开发的用于金属印刷的增材制造系统，即Additive Industries（Al）的MetalFAB1，并且发现Al的工程师认为该方法高效有效。 （C）2017 Elsevier Ltd.保留所有权利。

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