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Failure Modes and Effects Analysis

Failure Modes and Effects Analysis. Chapter 22. Failure Modes and Effects Analysis. Failure Modes and Effects (FMEA) Critically examine the system Divide the system into its various components Examine each individual component Record the ways the component may fail

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Failure Modes and Effects Analysis

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  1. Failure Modes and Effects Analysis Chapter 22

  2. Failure Modes and Effects Analysis • Failure Modes and Effects (FMEA) • Critically examine the system • Divide the system into its various components • Examine each individual component • Record the ways the component may fail • Rate potential degree of hazard • Examine all potential failures for each individual component and decide what effect the failures may have • Weakness: Human Error Component Missing • See additional notes

  3. Failure Modes and Effects Analysis • Failure Modes and Effects Analysis • Design FMEA’s • used to verify that a product has been properly designed to meet all of the customer’s requirements and that it can be manufactured at a target rate, cost, and yield. • Process FMEA’s • used to assess the adequacy of a process in producing a product.

  4. Failure Modes and Effects Analysis • What are Design FMEA’s used for? • To capture the relationship between: • customer requirements and • how a product can fail to meet these requirements and • the effects of the failures and • the problems with the design that cause the failures. • As a method to ensure that the design will be changed and tested so that the failures do not occur.

  5. Failure Modes and Effects Analysis • What are Process FMEA’s used for? • To identify the process and product controls that must be implemented to ensure that the product can be produced within specification.

  6. Failure Modes and Effects Analysis • What are Process FMEA’s used for? • To capture the relationship between • each process step and • the unacceptable process outputs that can be created at each step and • the effects of the unacceptable process outputs and • the causes of the unacceptable outputs and • how the unacceptable outputs will be either prevented or detected in the event that they occur.

  7. Failure Modes and Effects Analysis • Steps to Create an FMEA • Create a form similar to that shown in the chapter • Study the system, process, or part • What are the potential failure modes? • What are the potential failure causes? • What are the potential failure consequences? • What are the existing controls? • Identify Risk Priority Code • Severity • Probability of Occurrence • Analyze the document

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