Purchase Solution

Quality Control

Not what you're looking for?

Ask Custom Question

[1] A manufacturing process involved in the production of plastic molds for a specific automotive application is under study. To control the mean thickness of this (normally distributed) process with a standard deviation, s = 3.0, chart is used with n = 5, LCL = 14.15, and UCL = 15.85. If the process means shifts to 15.2, find the probability that the shift will be detected on the:

(a) first subsequent sample of 5 observations
(b) second subsequent sample of 5 observations

[3] Given the following information with regards to ( , S)-chart with n = 4:

-chart: UCL = 510, Center line = 500, and LCL = 490

S-chart: UCL = 12.9709, Center line = 6.5842, and LCL = 0.19753

(a) what fraction of items are nonconforming if specifications call for 501 ± 5?
(b) find the ARL if the process mean shifts to 493.

Purchase this Solution
Solution Summary

The solution describes the method to find the average run length and probability of detecting a shift in a manufacturing process.

Solution Preview

Please see the attached file.

Solution 1
Here it is given that the process standard deviation s = 3, subgroup size n = 5, LCL = 14.15 and UCL = 15.85
Now the Central Line (mean) is CL =(UCL+LCL)/2 =15
Let denote the process mean. Suppose the process mean shift from 15 to 15.2.
Let and denote the sample mean of first and second subsequent sample of 5 observations.
Now the probability that the shift will be ...

Purchase this Solution
Free BrainMass Quizzes
Measures of Central Tendency

Tests knowledge of the three main measures of central tendency, including some simple calculation questions.

Know Your Statistical Concepts

Each question is a choice-summary multiple choice question that presents you with a statistical concept and then 4 numbered statements. You must decide which (if any) of the numbered statements is/are true as they relate to the statistical concept.

Measures of Central Tendency

This quiz evaluates the students understanding of the measures of central tendency seen in statistics. This quiz is specifically designed to incorporate the measures of central tendency as they relate to psychological research.

Terms and Definitions for Statistics

This quiz covers basic terms and definitions of statistics.

View More Free Quizzes
Related BrainMass Solutions

  • Quality Control: Importance

    501663 Importance of Quality Control Visit the websites on Quality Control (QC) listed at the bottom of this page.

  • Quality Control and Continuous Improvement

    and quality control.

  • quality control, quality assurance, and quality management

    428956 Quality Control, Quality Assurance, and Quality Management What are the differences between quality control, quality assurance, and quality management? Which of these is most useful to a healthcare organization? Why are they most useful?

  • Quality Control and Associated Cost

    control cost assigned on the basis of direct labor cost (traditional system) Under this system the quality control cost = rate * direct labor cost Quality control cost = 14.5% * $27,500.00 = $3,987.50 Activity based accounting (Activity based costing

  • Quality Performance Monitoring and Control

    -Quality Performance Monitoring & Control -Identify the tasks, effort, and resources in the project plan to monitor and control quality -Disclose the contingency or primary budget that has been set aside for these tasks -Calculate the Cost of Quality

  • Cost of Quality

    320650 Business Finance Quality Cost Analysis Management at precise Manufacturing would like to analyze quality cost associated with the manufacturing process. In year 1, precise implemented a statistical process control system.

  • quality assurance

    -Understand the tools and techniques for quality control, such as Pareto analysis, statistical sampling, Six Sigma, quality control charts, and testing. Pareto analysis is a very important technique for quality control.

  • Quality assurance and quality control, IT

    Quality assurance and quality control are used to improve project quality. What is the relationship between quality assurance and quality control and explain how they are used to improve project quality.

  • Statistical Process Control for Wal-Mart

    365872 Quality Assurance and Statistical Process Control for Wal-Mart Integrating the background concepts of TQM, quality assurance, statistical control, and/or continuous improvement and demonstrates their appropriateness for a service or manufacturing

  • Managerial accounting - Quality Control Costs

    89488 Managerial accounting - Quality Control Costs Rainbow Spray Paints, Inc. has used a traditional cost accounting system to apply quality control costs uniformly to all products at a rate of 16 percent of direct-labor cost.

View More Related Solutions