homework questions
annmar3
homework_help.docxOn all questions you must explain or show the math behind your answers.
4. Which of the seven QC tools would be most useful in addressing each of the following situations? Explain your reasoning. (You may decide more than one tool is useful.)
a. A copy machine suffers frequent paper jams and users are often confused as to how to fix the problem.
b. The publication team for an engineering department wants to improve the accuracy of its user documentation but is unsure of why documents are not error-free.
c. A bank needs to determine how many teller positions, drive-through stations, and ATM machines it needs for a new branch bank in a certain busy location. Its information includes the average numbers and types of customers served by other similar facilities, as well as demographic information to suggest the level of customer traffic in the new facility.
d. A contracting agency wants to investigate why they had so many changes in their contracts. They believe that the number of changes may be related to the dollar value of the original contract of the days between the request for proposal and the contract award.
e. A travel agency is interested in gaining a better understanding of how call volume varies by time of year in order to adjust staffing schedules.
5. Develop a "personal quality checklist" on which you tally non-conformances in your personal life (such as being late for work school, not completing homework on time, not getting enough exercise, and so on.) What type of chart would you use to monitor your performance and why?
6. Computer upgrades have a nominal time of 30 minutes. Five sets of samples of six observations each have been taken, and the results are listed below. Using the factors in Appendix B, page 417, determine upper and lower control limits for mean and range charts, and decide if the process is in control.
|
Samples |
|
|
|
|
|
1 |
2 |
3 |
4 |
5 |
|
20.5 |
19.3 |
19.1 |
18.7 |
20.2 |
|
21.4 |
18.9 |
19.5 |
19.6 |
19.6 |
|
19.8 |
21.6 |
20.6 |
19.8 |
20.4 |
|
20.4 |
18.6 |
20.3 |
19.4 |
20.8 |
|
19.4 |
19.9 |
20.6 |
21.2 |
18.9 |
|
20.9 |
19.5 |
21.1 |
20.1 |
21.0 |
Appendix B:
7. A medical facility does MRIs for sports injuries. Occasionally, a test yields inconclusive results and must be repeated. Using the sample data below and a sample size of 100, determine the upper and lower control limits. Is the process in control? Show work.
|
Samples |
1 |
2 |
3 |
4 |
5 |
6 |
7 |
8 |
9 |
10 |
11 |
12 |
|
Number of retests |
5 |
2 |
6 |
0 |
1 |
11 |
7 |
4 |
3 |
1 |
4 |
6 |
8. An emergency room at a hospital wanted to understand and better control the waiting time for patients. To do this they constructed ͞x and R-charts by sampling the waiting times of the first five patients admitted to the ER at the beginning of each shift (7 a.m., 3 p.m., and 11 p.m.). What do you think of this approach? Will it provide the information the hospital administrators seek? How might the sampling process be improved, and what would you recommend? Show work
11. A small consulting group of a computer systems department has seven projects to complete. How should the projects be scheduled? The time in days and project deadlines are provided below. Determine the average processing time and average tardiness for each sequencing approach: First come, first served (FCFS), shortest processing time (SPT), and earliest due date (EDD). You may wish to use the spreadsheet in FCFS SPT EDD file. Show work
|
Project |
Time |
Deadline |
|
A |
8 |
17 |
|
B |
4 |
25 |
|
C |
12 |
60 |
|
D |
7 |
51 |
|
E |
10 |
31 |
|
F |
15 |
29 |
|
G |
18 |
46 |
|
H |
16 |
39 |
12. A process to make XYZ Company products requires that the product goes through two work centers. The production planner is working to schedule several jobs through the two work centers to have the shortest total throughput time. Job times are in minutes. You may wish to use spreadsheet in Johnsons Rule file.
Given the information below. Show work
a. Develop the job sequence that minimizes the idle time in the two work centers.
b. Prepare a chart of activities and determine each one's idle time.
|
Job |
A |
B |
C |
D |
E |
F |
|
Center 1 |
20 |
7 |
14 |
6 |
14 |
12 |
|
Center 2 |
13 |
10 |
5 |
11 |
9 |
8 |
Lesson 4 Activities: Provide a minimum of one page, double spaced solution to both activities.
1. Quality Dimensions
This activity will require students to review one or more sources to determine several dimensions of quality (two are included in the lesson materials). Then, using these dimensions, compare two products or services along the dimensions. The products should be reasonably comparable in price. So if you are comparing automobiles, try to compare models that may be trying to reach the same set of customers. For example, Toyota Camry and Honda Accord or Toyota Highlander and Chevrolet Traverse, might be more appropriate than a Nissan Altima and a Bentley. Service quality may also be selected and would involve comparing two service offerings. There is a web site listed below for service quality.
David Garvin's article "Competing on the Eight Dimensions of Quality" in November 1987 issue of Harvard Business Review.
Chris Akins. "8 Dimensions of Quality" at
http://lssacademy.com/2008/05/28/8-dimensions-of-quality/
A quick look at the definitions of eight dimensions of quality:
http://inasia.biz/tutorials/quality_dimensions.pdf
A service quality dimension list SERVQUAL may be reviewed at these web sites:
http://en.wikipedia.org/wiki/SERVQUAL
http://www.12manage.com/methods_zeithaml_servqual.html
2. Gantt Chart. A Gantt chart is a relative simple and effective tool for scheduling and managing projects. It offers an opportunity for a quick visual review of the production plan or project. For this assignment select a "project" from the list and develop a Gantt chart for completing the plan or project. Remember the plan should include both the tasks and the times. Your chart should have at least ten tasks.
1. Graduation from your undergraduate (or graduate) program. Do not select this option if you are graduating this Fall 2014 or Spring 2015. Be sure you include classes and administrative items that you must complete (example, applying for graduation, graduation checks, getting ready for the graduation ceremony, etc.).
2. Building your dream home or some similar project. Do not be overly concerned with every minute detail, but include major components of the project.
3. Taking a one-month, cross-country vacation to various Historic and National Parks in the United States.
4. Others may be approved by the instructor.
