Posted by jackie on Wednesday, December 8, 2010 at 4:01pm.
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
No one has answered this question yet.
Answer this Question
Related Questions
Math - A process for producing electronic circuits has achieved very high yield ...
internationa business operations management - As the production manager for an ...
business - MGT635-1003B-04 International Business Operations Management ...
chemistry - Calculating Parts per million Helium gas, 3.0 x 10^-4 is dissolved ...
biology - Leptin is a hormone that is produced by fat cells and plays a role in ...
Statistics - Can someone please help me with this example, I do not understand ...
Economics - a firm in a purely competitive industry is currently producing a ...
stats - Suppose a shipment of 500 machine parts contains 62 defective and 438 ...
chem - The units of parts per million (ppm) and parts per billion (ppb) are ...
statistics - A machine used in a production process is set up correctly 97% of ...
For Further Reading
