FMEA
Failure Modes and Effects Analysis is a systematic and proactive method that is used to identify potential failure modes in a system and their causes and effects. In the 1950s, the US military use this method to create better weapons. Since then FMEA methods are eventually improved. We can categorize this into three types but it can be different than this categorization as well.
Step 1
Source:https://www.researchgate.net/figure/Product-hierarchical-tree-structure-diagram_fig2_301446979 Step 2 In this step we identify the potential failure modes. Always, It’s better to be open minded and creative. Ways assets can malfunction,
We would analyze the failure effect and cause. The robust detailed diagram we implemented in the step 1 makes this step easier. We have to consider both upstream and downstream affects.
The team should be involved in this step to be more accurate. We have to define a criteria for severity, occurrence and failure detection rankings. The most severe failure would have assigned the 10 on a scale of 0 to 10. Likewise, we define rankings for occurrence based on the probability a failure may occur. When it comes to the failure detection rankings, consider how easy or difficult the failure will be to detect with the control system. At last we assign these rankings to the identified failures. Step 5 In this step we calculate the risk probability number(RPN). RPN determines the critical level of a failure. RPN = Severity x Occurrence x Detection Step 6 Starting from the top of the RPN value list, We adjust the RPN to be lower by making improvements.
Step 7 After implementing improvements, redo the ranking and check whether they are below the critical level. If so, we can go forward. I’m more than happy to see the comments or suggestions. So, I can improve myself as well.
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AuthorI'm Asiri. Electronic engineering Student. Archives
April 2023
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