Detection Rating Scale (Should be tailored to meet the needs of your company) Rating Description Definition Absolute The product is not inspected or the defect 10 uncertainty caused by failure is not detectable Product is sampled, inspected, and released Very 9 based on Acceptable Quality Level (AQL) remote sampling plans Product is accepted based on no defectives in 8 Remote a sample Product is 100% manually inspected in the 7 Very low process Product is 100% manually inspected using 6 Low go/no-go or other mistake-proofing gauges Some Statistical Process Control (SPC) is used 5 Moderate in process and product has a final inspection off-line Moderately SPC is used and there is an immediate 4 high reaction to out-of-control conditions An effective SPC program is in place with 3 High process capabilities (Cpk) greater than 1.33 2 Very high All product is 100% automatically inspected The defect is obvious or there is 100% Almost automatic inspection with regular calibration 1 certain and preventive maintenance of the inspection equipment
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 no 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 mistake-proofing gauges 5 Moderate Some Statistical Process Control (SPC) is used in process and product has a final inspection off-line 4 Moderately high SPC is used and there is an immediate reaction to out-of-control conditions 3 High An effective SPC program is in place with process capabilities (Cpk) greater than 1.33 2 Very high All product is 100% automatically inspected 1 Almost certain The defect is obvious or there is 100% automatic inspection with regular calibration and preventive maintenance of the inspection equipment Detection Rating Scale (Should be tailored to meet the needs of your company)
FMEA-Scales-v3.docx