Numerical - Per cent average outgoing quality - Metrology & Quality Control

Q.  In a lot size of 10000, probability of acceptance is 0.483 for 0.4% defectives. The number of defectives are not replaced, assume
np' = 1.36. Calculate % average outgoing quality
- Published on 07 Aug 15

a. 1.123
b. 0.1932
c. 0.789
d. None of the above

ANSWER: 0.1932

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    Discussion

  • Sravanthi   -Posted on 27 Oct 15
    Average outgoing quality:

    - Average outgoing quality is defined as the percent defectives found in outing products, which are replaced by non defective parts.

    Given: Lot size (N) = 10000, Probability of acceptance (Pa) = 0.483, p' = 0.4 %,

    Formula: Average outgoing quality = 100 x p' x Pa
    here, Pa = probability of acceptance

    Solution:

    % Average outgoing quality = 100 x p' x Pa

    = 100 x 0.004 x 0.483

    = 0.1932

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