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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780067
EISBN: 978-1-62708-268-6
... Abstract Failure mode assessment and assignment (FMA&A) is a tool designed to help organize the evaluation of hypothesized failure modes. This chapter begins by describing the process of preparing an FMA&A. It then describes the follow-on activities to evaluate the hypothesized failure...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780093
EISBN: 978-1-62708-268-6
... Abstract After the fault-tree, a failure-cause identification method has identified potential failure causes and the failure analysis team has prepared a failure mode assessment and assignment (FMA&A). The team knows specifically what to search for when examining components and...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780183
EISBN: 978-1-62708-268-6
... shortfalls. The failure analysis team can use the failure mode assessment and assignment (FMA&A) for assigning corrective actions, just as it did for failure-cause evaluation actions. The FMA&A assignment column is a good location for listing required corrective actions and...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180091
EISBN: 978-1-62708-256-3
... in the fault tree. A good tool for this is the failure mode assessment (FMA) chart. The FMA chart shown in Fig. 4 was created in a Microsoft Excel spreadsheet and comes straight from the fault tree in Fig. 3 . Note how the numbering systems on the fault tree and the FMA chart are identical and...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780075
EISBN: 978-1-62708-268-6
... the failure mode assessment and assignment (FMA&A) and ask if the suspect condition may be revealed by an analysis of the product pedigree. This is valuable from two perspectives: If the pedigree addresses the suspect area, it can be examined to assess if the pedigree reveals the presence of...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780171
EISBN: 978-1-62708-268-6
... assignment Taguchi methods AFTER THE FAILURE ANALYSIS TEAM hypothesizes failure causes, prepares a failure mode assessment and assignment (FMA&A), and evaluates all potential failure causes, it may find in some cases that several causes are still suspect but cannot be confirmed. In this situation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.9781627082563
EISBN: 978-1-62708-256-3
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780081
EISBN: 978-1-62708-268-6
... the failure, the failure analysis team should focus on areas identified in the failure mode assessment and assignment (FMA&A). Changes in designs, processes, tooling, operators, and environment occur almost constantly, so it is likely that the failure analysis team will find changes that occurred...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.tb.sfa.t52780109
EISBN: 978-1-62708-268-6
... (FMA&A) to determine if the nonconformance is related to the failure being analyzed or if it is simply a coincidental finding. Having pointed out the previous topics, the discussion turns to how to find information from failed items. References 1. Le May I...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.horfi.t51180127
EISBN: 978-1-62708-256-3
... failure investigation are a fault tree, a failure mode assessment (FMA) chart, and a technical plan for resolution (TPR) chart. They provide a documented, interchangeable, and concise set of information to ensure that all possible root causes are evaluated logically and efficiently. After determination of...