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IASSC Exam ICGB Topic 2 Question 62 Discussion

Actual exam question for IASSC's ICGB exam
Question #: 62
Topic #: 2
[All ICGB Questions]

The reported Cpk for a process with an average of 94 units, a spread of 22 units and upper and lower specification limits of 125 and 80 units would be?

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Suggested Answer: B

by Gwen at May 19, 2024, 05:57 PM

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Ronnie
9 months ago
Hmm, this one's tricky. I'm leaning towards A) 0.64, but I have a feeling the answer is going to be something I've never heard of, like 'it depends on the phase of the moon.' Gotta love these trick questions!
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Louisa
9 months ago
Ah, the age-old process capability question. I'm gonna go with B) 1.27 and hope my trusty calculator doesn't let me down. Maybe I should have brought a backup abacus just in case.
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Beatriz
9 months ago
I'm going with C) 1.84. The question gives us the key information we need to find Cpk, so it should be a straightforward calculation. I hope I'm not overthinking this!
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Brett
8 months ago
Yeah, I agree. The calculation for Cpk is pretty clear based on the information given.
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Stefany
8 months ago
I'm going with C) 1.84. The question gives us the key information we need to find Cpk, so it should be a straightforward calculation. I hope I'm not overthinking this!
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Kati
8 months ago
D) 2.12
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Johnetta
8 months ago
C) 1.84
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Buck
8 months ago
B) 1.27
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Reuben
8 months ago
I think you're right, C) 1.84 seems to be the correct answer.
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Rozella
8 months ago
A) 0.64
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Raina
8 months ago
Yeah, I agree. The calculation for Cpk should be straightforward with the data provided.
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Brock
8 months ago
I think you're right, C) 1.84 seems to be the correct answer based on the information given.
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Elke
9 months ago
Hmm, I think D) 2.12 is the correct answer. The Cpk formula takes into account the process spread and the specification limits, right? Let me double-check my work.
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Kattie
9 months ago
I'm pretty sure the answer is B) 1.27, but how do we calculate Cpk again? I need to brush up on my process capability formulas.
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Salley
8 months ago
You're welcome! It's always good to review those formulas.
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Aron
8 months ago
Oh, so the correct answer is actually A) 0.64 then. Thanks for the clarification!
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Ammie
8 months ago
Cpk = 0.21
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Colene
8 months ago
Cpk = min(0.47, 0.21)
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Tamra
8 months ago
Cpk = min(31/66, 14/66)
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Vannessa
8 months ago
So for this process, Cpk = min((125-94)/(3*22), (94-80)/(3*22))
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Marica
9 months ago
To calculate Cpk, you use the formula: Cpk = min((USL - average)/(3*spread), (average - LSL)/(3*spread))
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Mignon
9 months ago
So in this case, it would be (125 - 94) / (3 * 22) = 1.41, which is closest to 1.27.
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Annelle
9 months ago
You calculate Cpk by taking the minimum of (USL - mean) / (3 * standard deviation) and (mean - LSL) / (3 * standard deviation).
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