fmeatraining2(編輯修改稿)
2025-03-27 21:43 本頁面
【文章內(nèi)容簡介】 s of Each Failure Mode ? After the failure modes are listed on the FMEA worksheet form, the FMEA team needs to review each failure mode and identify the potential effects 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 estim
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