Need help on Quality question

Submitted by GoldenKnight on Fri, 10/14/2011 - 13:56

Which of the following is least true?

A)
Pareto diagrams typically identify the 20% of all possible root causes that are responsible for 80% of the problems.

B)
In project QC, both product-related deliverables and project management deliverables are monitored.

C)
Statistical sampling means that inspection of only 50%, instead of 100% of the population, reduces testing time by half.

D)
Prevention over inspection is a project quality concept.

The answer guide says the correct answer is C).

That doesn't make sense to me. Can anyone help me understand this?

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PMP / CAPM exam Question bank

harishgulati

Fri, 10/14/2011 - 14:31

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Yes C is correct. A is true

Yes C is correct.

A is true for Pareto

B is correct as well bcoz you monitor both product and project deliverable

D is also correct coz that is the quality concept.

C is incorrect becoz stats sampling doesn't specifically say about how much % of sampling is good (like in example 50% ) without knowing the total polouation. And you can not necessary conclude that it surely reduces testing time by half, hence incorrect.

gabrielroj

Fri, 10/14/2011 - 14:43

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