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FAILURE MODE EFFECTIVE ANALYSIS. Introduction Introduction Failure Mode Effect Analysis is an analytical technique that goes in for combining Technology.

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Presentation on theme: "FAILURE MODE EFFECTIVE ANALYSIS. Introduction Introduction Failure Mode Effect Analysis is an analytical technique that goes in for combining Technology."— Presentation transcript:

1 FAILURE MODE EFFECTIVE ANALYSIS

2 Introduction Introduction Failure Mode Effect Analysis is an analytical technique that goes in for combining Technology and Experience of people to identify foreseen failures in a product or process and planning to eliminate the Failure. Failure Mode Effect Analysis is an analytical technique that goes in for combining Technology and Experience of people to identify foreseen failures in a product or process and planning to eliminate the Failure. Definition Definition FMEA is a group of activities to understand and evaluate potential failure of product or process and its effects, and identify actions that eliminate or reduce the potential failures. FMEA is a group of activities to understand and evaluate potential failure of product or process and its effects, and identify actions that eliminate or reduce the potential failures.

3 Types of FMEA Major Classification Major Classification Design FMEA Design FMEA Process FMEA Process FMEA Sub Classification Sub Classification Equipment FMEA Equipment FMEA Maintenance FMEA Maintenance FMEA Service FMEA Service FMEA System FMEA System FMEA

4 DESIGN FMEA DESIGN FMEA Design FMEA use in the design process by identifying known and foreseeable failures modes and ranking failures according to their impact on the product. Design FMEA use in the design process by identifying known and foreseeable failures modes and ranking failures according to their impact on the product.

5 PROCESS FMEA PROCESS FMEA It is used to identify potential process failure modes by ranking failures and establishing priorities, and its impact on the Internal or external customers. It is used to identify potential process failure modes by ranking failures and establishing priorities, and its impact on the Internal or external customers.

6 RELIABILITY Reliability is defined as the probability that the product will perform as per the expectation for a certain period of time, under the given operating conditions, and the given set of product performance characteristics. Reliability is defined as the probability that the product will perform as per the expectation for a certain period of time, under the given operating conditions, and the given set of product performance characteristics. The part, assembly, or process under consideration, the reliability of each sub system and factors that contribute to failure to be found. The part, assembly, or process under consideration, the reliability of each sub system and factors that contribute to failure to be found.

7 FAILURE RATE Products follow a pattern of failure. Products follow a pattern of failure. There is no information about the reliability (i.e. Failure) of the product. There is no information about the reliability (i.e. Failure) of the product. Failure Rate is a constant is known period of failure can be found out using Exponential Distribution Failure Rate is a constant is known period of failure can be found out using Exponential Distribution R t = e – λ t R t = Reliability of survival R t = e – λ t R t = Reliability of survival R t = e - t / θ t = Time for operation without failure R t = e - t / θ t = Time for operation without failure λ = Failure rate θ = Mean time to Failure λ = Failure rate θ = Mean time to Failure

8 PROBLEM Failure Rate λ =.0002 per hour Failure Rate λ =.0002 per hour What is the probability that it will survive or reliable during the first 200 hours of operations? What is the probability that it will survive or reliable during the first 200 hours of operations? Solution Solution Rt = e – λt = e – (200) (0.0002) = e – (200) (0.0002) = %

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