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A practical reliability allocation method considering modified criticality factors

机译：考虑修正临界因子的实用可靠性分配方法

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摘要

Reliability allocation is a very critical step of product development process for setting achievable reliability goals. The majority of existing methods allocate system level failure rate target to subsystems or components instead of allocating failure rate reduction (improvement) targets. This approach of reliability allocation often allocates reliability goals lower than existing reliability levels. Further, the existing methods failed to effectively capture potential for improvement and impact of improvement efforts on failure effects while calculating reliability allocation weights. This paper investigates the limitations of existing approaches and proposes a modified criticality measure for allocating system level reliability improvement goal to subsystems. The modified criticality measure is developed considering non-linear phenomena for both severity rating and failure rate to capture potential for improvement. The failure rate reduction targets are assigned in proportion of improvement potential. A case example is presented to demonstrate the effectiveness of the proposed approach.
机译：可靠性分配是产品开发过程中非常重要的一步，用于设定可实现的可靠性目标。大多数现有方法将系统级故障率目标分配给子系统或组件，而不是分配故障率降低（改善）目标。这种可靠性分配方法通常会分配低于现有可靠性级别的可靠性目标。此外，现有方法在计算可靠性分配权重时未能有效地捕捉改进的潜力以及改进工作对失效影响的影响。本文研究了现有方法的局限性，并提出了一种用于将系统级可靠性改进目标分配给子系统的改进的临界度度量。考虑到严重性等级和失败率都考虑了非线性现象，从而开发了改进的临界度量，以捕获改进的潜力。降低故障率的目标是按改善潜力的比例分配的。给出了一个案例，以证明该方法的有效性。

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