FMEA = Failure Mode and Effect AnalysisTerminology:
- Failure: Loss of a function under stated conditions
- Failure mode: The way in which the components, sub -assembly, product, input, or process could fail to perform its intended function.
- Effect Analysis: Studying the consequences of the various failure modes to determine their severity to the customer.
- Failure Mode and Effect Analysis: is a step-by-step approach by identifying all possible failures in a design, a manufacturing or a product or a service.
- Methodology that fecilitates process improvement
- Improves internal and external customer satisfaction
- Focusses on prevention
- Identifies and eliminates concerns early in the development of a process or a design.
- Occasionally, it satisfies contractual customer requirement.
- Occasionaly, required by Quality Management System Standard, such as ISO.
- Design engineers
- Process engineers
- Material suppliers
- Reliability engineers
- Determine the failure mode for each process input
- For each failure mode, determine effects - Select a severity level for each effect.
- Identify potential causes for each failure mode- Select an occurance level for each cause.
- List current controls for each cause- Select a detection for each cause.
- calculate the Risk Priority Number (RPN)
- Develop recommended action, assign responsible persom and take actions.
- Assign predicted severity, Occurance and detection levels and compare RPNs.
- Severity is based on the effects on customer requirements, generally on a 1 (not severe) to 10 (very severe) scale.
- Occurance is frequency with which a given cause occurs and creates failure modes, generally on a 1 (not likely) to 10 (very likely) scale.
- Detection is based on the ability of the current control scheme to detect then prevent a given cause, generally on a 1 (easy to detect) to 10 (not easy to detect) scale.
Solved Example: 9032-01
In the context of factors utilized in FMEA, choose the odd one out. (ISRO IPRC Tech Asst Mech Apr 2018)
Correct Answer: C