FMEA analysis seven-step method is as follows:
FMEA (Failure Modes and Effects Analysis) is a kind of reliability tool for identifying, evaluating and prioritizing potential product or process failures. The following is a seven-step approach to FMEA analysis:
Determine the object of analysis: first you need to define the object of FMEA analysis, such as products, components, processes, etc..
Determine the boundaries of the analysis: Determine the boundary conditions of the analysis, such as analysis in a certain period of time, or only consider a particular factor or environmental conditions.
List All Possible Failure Modes: List all possible failure modes, including the types, phenomena, and causes of failures that may occur in a product or process.
Evaluate the impact of the failure: For each failure mode, analyze the impact on the product or process, including the impact on performance, safety, reliability, etc.
Determine the severity of the failure (Severity): According to the impact of each failure mode, determine its severity, generally divided into "high", "medium", "low" three levels. "
Determine the severity of each failure mode.
Determine the frequency of failure (Occurrence): analyze the frequency or probability of occurrence of each failure mode in order to understand the extent of its impact on the entire system.
Calculating the Risk Priority Number (RPN): the RPN is the product of severity and frequency of occurrence; the greater the value, the higher the risk of the failure mode and the higher the priority to be given to it.
In the FMEA analysis process, you also need to pay attention to the following points:
Comprehensiveness: as far as possible to list all possible failure modes, to avoid omissions.
Objectivity: When assessing the impact and severity of failures, be as objective as possible and avoid subjectivity.
Prioritization: Prioritize the highest risk failure modes based on RPN values.
Continuous Improvement: FMEA analysis is a continuous improvement process that requires constant data collection and updating of analysis results in order to better improve product reliability and safety.