關(guān)于fmea的培訓(xùn)資料(英文版)-展示頁
2025-01-17 19:26本頁面
【正文】 fects of the failure should it occur. ? For some failure modes, there may be only one effect, while other failure modes may have several effects. ? This step must be thorough – this information will determine assignment of risk ratings for each of the failures. ? It is helpful to think of this step as an ifthen process: If the failure occurs, then what are the consequences. Q u ality Forw ard SystemStep 4 – Assign Severity Rating ? The severity rating is an estimate of how serious the effects would be if a given failure did occur. ? May be based on past experience, or an estimate based on the knowledge and expertise of the team members. ? Because each failure may have several different effects, and each effect may have a different level of severity, the effect, not the failure, must be rated. Each effect should be given its own severity rating. ? Ratings based on 10point scale, with 1 being the lowest rating and 10 being the highest. ? General example on next page – may be customized by team for their specific FMEA project. Q u ality Forw ard SystemStep 4 continued – Severity Rating Scale Example Rating Description Definition 10 Dangerously High Failure could injure the customer or an employee 9 Extremely High Failure would create nonpliance with federal regulations 8 Very High Failure renders the unit inoperable or unfit for use 7 High Failure causes a high degree of customer dissatisfaction 6 Moderate Failure results in a subsystem or partial malfunction of the product 5 Low Failure creates enough of a performance loss to cause the customer to plain 4 Very Low Failure can be overe with modifications to the customer’s process or product, but there is minor performance loss 3 Minor Failure would create a minor nuisance to the customer, but the customer can overe it in the process or product without performance loss. 2 Very Minor Failure would not be readily apparent to the customer, but would have minor effects on the customer’s process or product 1 None Failure would not be noticeable to the customer and would not affect the customer’s process or product. Q u ality Forw ard SystemStep 5 – Assign Occurrence Rating ? The occurrence rating is a measure of how often an failure mode may occur. ? Best method for determine occurrence rating is to use actual data from the process (for example, failure logs or process capability data). ? If actual data is not available, the team needs to estimate how often a failure mode could occur. ? Team can make a better estimate of how likely a failure mode is to occur and at what frequency by knowing the potential causes of failure. ? Ratings based on 10point scale, with 1 being the lowest rating and
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