Week 5 Application Activity: Quality Measurement

Overview
To support your understanding of quality measurement, below are three data-driven problem sets. These
problems correspond to the topics covered in Week 5, so it is essential that you keep up with the course
materials and reach out to your professor if you have questions about a particular topic or application.
Instructions
1. Read pages 383-399 in Evans and Lindsay
2. Watch the following LinkedIn Learning videos:
• Six Sigma Black Belt: Key terms for measurement system analysis for continuous data
• Six Sigma Black Belt: Conduct measurement system analysis (MSA) for continuous data
• Six Sigma Black Belt: Measurement system analysis (MSA) for attributes
• Six Sigma Black Belt: Process capability for continuous data
• Six Sigma Black Belt: Display improved process capability
3. Open the exercise file listed in each problem
4. Copy and paste the relevant data from the exercise file into the appropriate Minitab function to
run the calculation and generate the chart(s).
5. Copy and paste the Minitab chart into Word.
6. Answer the accompanying questions for each problem.
Problems
1. The ABC Quality Company is having problems with the quality of its products. Before any data
can be collected for analysis, ABC has to ensure that the data to be used is indeed valid. So, a
measurement system analysis or MSA has to be conducted. ABC uses three appraisers, Larry,
Curly and Moe. The MSA study was also designed to have two rounds of trials or replicates. Each
appraiser measured all 10 numbered parts given to them in random order by the MSA facilitator.
The appraisers did not know which numbered part is which. Each measurement by the appraiser
was recorded by the facilitator and the results are shown in the exercise file below.
Open exercise file 02_05_LCM and complete the following:
A. Using Minitab, run a Crossed Gage R&R study using the ANOVA method and display the
results (Note: the product specifications are 0.5 for the lower specification limit and 10.5
for upper specification limit).
JWI 554: Delivering Quality
Week 5 Application Activity
© Strayer University. All Rights Reserved. This document contains Strayer University confidential and proprietary information and may not be copied,
further distributed, or otherwise disclosed, in whole or in part, without the expressed written permission of Strayer University.
JWI 554 Week 5 Application Activity (1222) Page 2 of 4
B. What is the Gage R&R percent contribution?
C. What is the Part-to-Part variation?
D. Create a Gage Run Chart. What can you conclude from this chart?
E. Is the measurement system valid? If not, what needs to be done to improve the
measurement system?
2. Process capability is a thorough way to measure quality performance to evaluate how well
specifications are being met. As part of a lean supply chain, the supplier has committed to
delivery times within a window of 20 to 24 hours.
Open exercise file 05_04_Process Capability (Note: delivery times are in Column E).
A. What are the lower and upper specification limits?
B. Using Minitab to run the Normal process capability analysis, display the graphs and
results.
C. What is the Cp and Cpk?
D. What percent of deliveries are not on-time? What percent are early? What percent are
late?
E. Do the measures of central location OR the measures of dispersion (or both) need to be
improved to meet specifications? What project methodology should be used for this
improvement project?
3. Sometimes what is being evaluated is based on an attribute not on continuous data. It is based
on whether the attribute passes or fails a quality criterion. For example, does the French fry taste
right? To assess if this evaluation is done correctly and consistently, a type of MSA called an
Attribute Agreement Analysis must be carried out. In one company’s MSA study, we have three
appraisers, Mary, Tom, and James, evaluating 15 sample items with two trials. The outcome is
pass or fail.
Open exercise file 02_06_Attribute MSA and complete the following:
A. Using Minitab, carry out the MSA using Attribute Agreement Analysis.
B. Is the measurement system valid? Explain.
C. What conclusions can you draw about the performance of Mary, Tom, and James?
D. Which appraiser needs improvement (Mary, Tom, and/or James) and what actions do you
recommend?
E. What, if anything, needs to be done to improve the measurement system?
JWI 554: Delivering Quality
Week 5 Application Activity
© Strayer University. All Rights Reserved. This document contains Strayer University confidential and proprietary information and may not be copied,
further distributed, or otherwise disclosed, in whole or in part, without the expressed written permission of Strayer University.
JWI 554 Week 5 Application Activity (1222) Page 3 of 4
Professional Formatting Requirements:
• Submit your work in Word.
• Include a cover page containing the title of the assignment, your name, your professor’s name,
and the course title and date
• Include a references page showing all your sources
• The cover page and the references page are not included in the required page length
• Double-spaced, professional font (Times New Roman or Ariel), 10-12 font size
• Headings used to identify main topics and subtopics
• Paragraphs are separated by a single space