Read the "JET Copies" Case Problem on pages 678-679 of the text. Using simulation estimate the loss of revenue due to copier breakdown for one year, as follows:
- In Excel, use a suitable method for generating the number of days needed to repair the copier, when it is out of service, according to the discrete distribution shown.
- In Excel, use a suitable method for simulating the interval between successive breakdowns, according to the continuous distribution shown.
- In Excel, use a suitable method for simulating the lost revenue for each day the copier is out of service.
- Put all of this together to simulate the lost revenue due to copier breakdowns over 1 year to answer the question asked in the case study.
- In a word processing program, write a brief description/explanation of how you implemented each component of the model. Write 1-2 paragraphs for each component of the model (days-to-repair; interval between breakdowns; lost revenue; putting it together).
- Answer the question posed in the case study. How confident are you that this answer is a good one? What are the limits of the study? Write at least one paragraph.
There are two deliverables for this Case Problem, the Excel spreadsheet and the written description/explanation. Please submit both of them electronically via the dropbox.
The assignment will be graded using the associated rubric.
Outcome Assessed: |
- Create statistical analysis of simulation results.
- Communicate issues in management science
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Grading Rubric for JET Copies Case Problem
There are 12 possible points in each of the five criteria for a total of 60 points possible. |
Criteria |
0Unacceptable(0 points) |
1Developing(6 points) |
2Competent(9 points) |
3Exemplary(12 points) |
1. Model number of days to repair |
Did not submit or did not model this component in an appropriate manner |
This component was modeled, but the method and/or implementation had mistakes that affected the validity of the model |
Used a method that is recognizably appropriate, but the implementation had minor mistakes |
Used an appropriate method and correctly implemented it |
2. Model number of weeks between breakdowns |
Did not submit or did not model this component in an appropriate manner |
This component was modeled, but the method and/or implementation had mistakes that affected the validity of the model |
Used a method that is recognizably appropriate, but the implementation had minor mistakes |
Used an appropriate method and correctly implemented it |
3. Model lost revenue due to breakdowns |
Did not submit or did not model this component in an appropriate manner |
This component was modeled, but the method and/or implementation had mistakes that affected the validity of the model |
Used a method that is recognizably appropriate, but the implementation had minor mistakes |
Used an appropriate method and correctly implemented it |
4. Provide written description and explanation of the simulation |
Did not submit or described insufficiently. Omitted key points. |
Provided partially developed written description that matches the method 70 - 79% accuracy. |
Provided sufficiently developed written description that matches the method 80 - 89% accuracy. |
Provided fully developed written description that is correct and matches the method used with 90 - 100% accuracy. |
5. Combine model components to produce a coherent answer to the question posed in the case study. (a) Answer the question posed in the case study. (b) How confident are you that this answer is a good one? (c) What are the limits of the study? |
Did not submit or result not provided, and/or discussed insufficiently. |
Provided partially correct result. Omitted discussion of confidence. Discussed limitations partially with 70 - 79% accuracy, logic, and clarity. |
Provided sufficiently correct result. Identified confidence and discussed limitations sufficiently with 80 - 89% accuracy, accuracy, logic, and clarity. |
Provided fully correct result. Identified confidence and discussed limitations fully with 90 - 100% accuracy, logic, and clarity. |