5. Allan Hinge Company records 8 primary quality opportunities during production

Question

5. Allan Hinge Company records 8 primary quality opportunities during production of a particular type of brass door hinge (these are opportunities for a defect, mistake, or error). After an inspection of 370 random hinges, a worker finds a total of 22 nonconforming parts. a) On average, how many defects per unit? b) On average, how many defects per opportunity? c) On average, how many defects per million opportunities? d) What is the sigma capability?

Explanation / Answer

Defects (A) 22 Opportunities (B) 370 Defect Opportunities per unit ( C) 8 a) Average Defects per unit (A/B) 0.059459 b) Average Defects per Opportunity (A/B*C) 0.007432 c) Average Defects per Million Opportunities 7432.432 d) Sigma Capability 3.935655 =IF(B3=0,"",(IF((B10/1000000)>0.933199,0,IF((B10/1000000)>0.5,1.5-ABS(NORMSINV(B10/1000000)),ABS(NORMSINV(B10/1000000))+1.5)))) B3 = 370 B10 = 7432.432

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