關(guān)于fmea的培訓(xùn)資料(英文版)-在線瀏覽
2025-02-12 19:26本頁面
【正文】 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 5 continued – Occurrence Rating Scale Example Rating Description Potential Failure Rate 10 Very High – Failure is almost inevitable More than one occurrence per day or a probability of more than three occurrences in 10 events (Cpk ). 9 One occurrence every three to four days or a probability of three occurrences in 10 events (Cpk approximately equal to ). 8 High – Repeated failures One occurrence per week or a probability of 5 occurrences in 100 events (Cpk approximately equal to ). 7 One occurrence every month or one occurrence in 100 events (Cpk approximately equal to ) 6 Moderate – Occasional failures One occurrence every three months or three occurrences in 1,000 events (Cpk approximately equal to ) 5 One occurrence every six months to one year or one occurrence in 10,000 events (Cpk approximately equal to ) 4 One occurrence per year or six occurrences in 100,000 events (Cpk approximately equal to ) 3 Low – Relatively few failures One occurrence every one to three years or six occurrences in 10 million events (Cpk approximately equal to ) 2 One occurrence every three to five years or two occurrences in one billion events (Cpk approximately equal to ) 1 Remote – Failure is unlikely One occurrence in greater than five years or less than two occurrences in one billion events (Cpk greater than ) Q u ality Forw ard SystemStep 6 – Assign Detection Rating ? The detection rating looks at how likely it is that a failure or the effect of a failure will be detected. ? Start by identifying current controls that may detect a failure or effect of a failure (example – SPC or inprocess checks). ? More controls in place generates a low number (better) rating。 no current controls means the likelihood of detection is low and therefore the item would receive a high number (worse) 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 6 continued – Detection Rating Scale Example Rating Description Definition 10 Absolute Uncertainty The product is not inspected or the defect caused by failure is not detectable. 9 Very Remote Product is sampled, inspected and released based on Acceptable Quality Level (AQL) sampling plans. 8 Remote Product is accepted based on new defectives in a sample. 7 Very Low Product is 100% manually inspected in the process. 6 Low Product is 100% manually inspected using go/no go or other mistakeproofing gages 5 Moderate Some Statistical
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