As mentioned in the introduction to the AIAG/VDA aligned standard (“Vol. V: Alignment”), the new FMEA Handbook, is a significant expansion of its predecessors. A substantial portion of this expansion is the introduction of a new FMEA type – the Supplemental FMEA for Monitoring and System Response (FMEA-MSR).
Modern vehicles contain a plethora of onboard diagnostic tools and driver aids. The FMEA-MSR is conducted to evaluate these tools for their ability to prevent or mitigate Effects of Failure during vehicle operation.
Discussion of FMEA-MSR is devoid of comparisons to classical FMEA, as it has no correlate in that method. In this installment of the “FMEA” series, the new analysis will be presented in similar fashion to the previous aligned FMEA types. Understanding the aligned Design FMEA method is critical to successful implementation of FMEA-MSR; this presentation assumes the reader has attained sufficient competency in DFMEA. Even so, review of aligned DFMEA (Vol. VI) is highly recommended prior to pursuing FMEA-MSR.
To conduct a Process FMEA according to AIAG/VDA alignment, the seven-step approach presented in Vol. VI (Aligned DFMEA) is used. The seven steps are repeated with a new focus of inquiry. Like the DFMEA, several system-, subsystem-, and component-level analyses may be required to fully understand a process.
Paralleling previous entries in the “FMEA” series, this installment presents the 7-step aligned approach applied to process analysis and the “Standard PFMEA Form Sheet.” Review of classical FMEA and aligned DFMEA is recommended prior to pursuing aligned PFMEA; familiarity with the seven steps, terminology used, and documentation formats will make aligned PFMEA more comprehensible.
To differentiate it from “classical” FMEA, the result of the collaboration between AIAG (Automotive Industry Action Group) and VDA (Verband der Automobilindustrie) is called the “aligned” Failure Modes and Effects Analysis process. Using a seven-step approach, the aligned analysis incorporates significant work content that has typically been left on the periphery of FMEA training, though it is essential to effective analysis.
In this installment of the “FMEA” series, development of a Design FMEA is presented following the seven-step aligned process. Use of an aligned documentation format, the “Standard DFMEA Form Sheet,” is also demonstrated. In similar fashion to the classical DFMEA presentation of Vol. III, the content of each column of the form will be discussed in succession. Review of classical FMEA is recommended prior to attempting the aligned process to ensure a baseline understanding of FMEA terminology. Also, comparisons made between classical and aligned approaches will be more meaningful and, therefore, more helpful.
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