Specification limits are used for the product and control limits for the

Specification limits are used for the product and

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Specification limits are used for the product and control limits for the process.
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Problem 1E Which would be preferable A higher or lower process capability index? A higher index will be preferable, because standard deviation is smaller.
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Problem 1F Which set of data shown in the figures below is better A or B? Why? ? ? = ??? 3𝜎 ? ?? = min ??? − 𝜇 3𝜎 , 𝜇 − ??? 3𝜎 ? ?? = ??? −??? 6 𝜎 2 + (𝜇 −?) 2 B is better because its 𝑪 𝒑𝒎 value is higher, which means the average ( 𝝁 ) is closer to the target ( 𝑻 ), and the standard deviation ( 𝝈 ) is small. Target = 0
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Problem 1G What may cause a sustained mean shift? Tooling failure, tool move, materials change, operator change.
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Problem 1H What are the limitations of each ? ? , ? ?? and ? ?? . Is there an ideal process capability index? ? ? = ??? 3𝜎 ? ?? = min ??? − 𝜇 3𝜎 , 𝜇 − ??? 3𝜎 ? ?? = ??? −??? 6 𝜎 2 + (𝜇 −?) 2 There is no ideal process capability index, chosen as per the application. o Based on process standard deviation and width of specification (tolerance) o Not consider the deviation of process mean from target value o Consider the mean w.r.t. specification and the standard deviation o Not consider the deviation from the target o Consider the deviation from the target o Difficult to calculate
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Problem 2 (HW5 Q4)
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Problem 3 For the figure shown below, obtain the bilateral tolerance for dimension D using i. Worst case analysis
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