Q15OQ Question:聽Large-scale integrate... [FREE SOLUTION]

91影视

Operations And Supply Chain Management

F. Robert Jacobs

Business Studies

14th Edition 路 800 pages

ISBN: 9780078024023

Chapter 2: Q15OQ (page 342)

Question:Large-scale integrated (LSI) circuit chips are made in one department of an electronics firm. These chips are incorporated into analog devices that are then encased in epoxy. The yield is not particularly good for LSI manufacture, so the AQL specified by that department is 0.15 while the LTPD acceptable by the assembly department is 0.40.
Develop a sampling plan.
Explain what the sampling plan means; that is, how would you tell someone to do the test?

Short Answer

Expert verified

Answer

In statistics, sampling refers to the process of analyzing statistically, an already predefined number of observations collected from a large number of given data. Large-scale integrated (LSI) circuit chips are formed by the combination of millions of MOS transistors onto a single chip. It began in the year of 1970s when the MOS integrated chips were widely adopted.

Step by step solution

(a) Develop a sampling plan

Step 1: (a) Develop a sampling plan

AQL= 0.15,

LTPD= 0.40,

C= 5,

n (AQL) = 4.695

$n= \frac{4.695}{AQL} n= \frac{4.695}{0.15} n=313$

Round up the answer to the nearest whole number i.e. 32.

n = 32.

(b) Sampling Plan and how to tell someone to do the test

Step 2: (b)Sampling Plan and how to tell someone to do the test

The sampling plan is a physical outline of the measurements that need to be taken in a proper manner and it also involves at what time, in what manner, and by whom it needs to be done. Just tell them to prepare aRandom Sample of 32 chips, and reject the lot if it is more than 8 are defective.