Tuesday
April 21, 2015

Homework Help: Math

Posted by jackie on Thursday, December 9, 2010 at 9:27am.

A process for producing electronic circuits has achieved very high yield levels. An average of only 10 defective parts per million is currently produced.

1. What are the upper and lower control limits for a sample size of 100?

2. Recompute the upper and lower control limits for a sample size of 10,000?

3. Which of these two sample sizes would you recommend? Explain.

Management has reconsidered the method of quality control and has decided to use process control by variables instead of attributes. For variables control a circuit voltage will be measured based on a sample of only five circuits. The past average voltage for samples of size 5 has been 3.1 volts, and the range has been 1.2 volts.

1. What would the upper and lower control limits be for the resulting control charts (average and range)?

2. Five samples of voltage are taken with the results in the table below. What action should be taken if any?

3. Discuss the pros and cons of using this variables control chart versus the control chart discussed in the first part of the assignment. Which do you prefer?


Ex. 1 2 3 4 5
x 3.6 3.3 2.6 3.9 3.4
R 2.0 2.6 0.7 2.1 2.3

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

college - A process for producing electronic circuits has achieved very high ...
internationa business operations management - As the production manager for an ...
business - MGT635-1003B-04 International Business Operations Management ...
math - If 30 samples of 100 items are tested for nonconformity, and 95 of the 3,...
math - If 30 samples of 100 items are tested for nonconformity, and 95 of the 3,...
Statistics - An electronic product contains 32 integrated circuits. The ...
statistics2 - A textbook publisher wants to determine process control charts for...
Operations Management - Twelve samples, each containing five parts, were taken ...
Algebra - The following is a report of defective parts reported by inspectors in...
Statistics - 1) A null Hypothesis assumes that a process is producing no more ...

Members