M3 Manufacturing appoints two quality engineers, Rojia and Chris, to investigate
ID: 3045800 • Letter: M
Question
M3 Manufacturing appoints two quality engineers, Rojia and Chris, to investigate what lot sampling strategy they should use with one of their suppliers. Rojia and Chris separately develop their own lot sampling strategies (different lot size (N), sample size (n), and maximum nonconformings in a sample (c). Rojia decides to use a Type A OC curve to see the behavior of her lot sampling strategy and Chris decides to use a Type B OC curve to see the behavior or his lot sampling strategy. Rojia's and Chris' OC Curves are given in the following figure. Which OC curve belongs to Rojia and which OC curve belongs to Chris? 1.2 0.8 0.6 0.4 0.2 0.01 0.02 0.03 0.04 0.05Explanation / Answer
The Blue curve is Roji's OC curve and Red Curve is Chris's OC curve
Because, Type A curve is always lower than the Type B curve. Type A curve always has less probability of acceptance than Type B curve.
As the lot size increases, type A curve approaches Type B curve.
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