Multiple Choices. Provide a basis for your selected answer or reference. Only one answer represents the best and the correct answer. Highlight the answer and provide a 1 line justification underneath for all multiple choice questions.

1. Multiple Choices. Provide a basis for your selected answer or reference. Only one answer represents the best and the correct answer. Highlight the answer and provide a 1 line justification underneath for all multiple choice questions.
2. Which of the following is not a basic systems engineering concept?

 

1. Define need before function
2. Define function before requirements
3. Developing a prototype based on the solution to a previous similar problem.
4. Define requirements before seeking answers
5. Examining alternatives before selecting an answer
6. All of the above
7. None of the above
8. d and e only

 

2. In the systems development life cycle, software engineering:

 

1. implements a transfer function that matches interface constraints that are previously defined by the systems design team.
2. is a domain or specialty engineering task
3. is at the same hierarchical level as integrated logistics support
4. all of the above

e .none of the above

1. a and b only
2. b and c only

 

3. Concept exploration, feasibility studies, and pre-systems definitions are each terms that apply to the phase of design in which the objective is to seek revolutionary improvements in products and services. Which of the following questions are investigated during pre-systems definition?

 

a .Is the program technically feasible?

1. Are the costs within acceptable bounds?
2. Are the risks within acceptable bounds?
3. Is the potential profitability sufficient?
4. Are the requirements fully defined?
5. How many lines of code are in the final product?
6. All of the above.
7. None of the above
8. a, b, c, and d only
9. e and f only

 

4. All candidate solutions to a system design problem must conform to an identical logical model. Which of the following are required characteristics of the logical model?
5. conceptual integrity
6. lack of complication
7. form follows function
8. All of the above
9. None of the above
10. a and b only
11. a and c only
12. b and c only

 

5. Which of the following is NOT a factor in maintainability?

 

1. time required for fault detection
2. mean time between failures
3. time required for repair
4. time required to restore function following repair
5. time required for fault isolation
6. All of the above.
7. None of the above.

 

 

1. Numbers and Calculations.   Please highlight the correct answer (s).

 

The next 5 problems are based on the following situation: Your system is deployed against defensive measures taken by an adversary that are 40 percent effective. That is, your system has a 60 percent survivability (probability of overcoming the defense) to complete its mission. The system is based at a remote location with limited supply capability. Airlifting, a part to the remote location takes an average of ten hours from the time the stock deficiency is noticed. It takes a technician an average of four hours to repair the system and an average of two hours to bring it back on line after the repair. Once in operation, the probability that the system will complete its mission without intrinsic failure is 0.9. The mission interval is 55 hours.

 

1. The mean-time-between-failures (MTBF) for the system is approximately:

 

a.522 hours

b.532 hours

c.550 hours

d.562 hours

e.572 hours

1. None of the above

 

2. The mean-time-to-restore operation (MTR) for the system is approximately:

 

a.1 hour

b.2 hours

c.3 hours

d.4 hours

e.5 hours

       f.6 hours

g.8 hours

h.10 hours

1. None of the above

 

3. Taking logistics delay into account; the system operational availability is approximately:

 

a.0.949

b.0.970

c.0.989

d.0.992

1. None of the above

 

4. If the supply bin has all the spare parts needed for repair, the intrinsic availability is approximately:

 

1. 0.945

b .0.950

1. 0.966
2. 0.970
3. 0.989
4. None of the above

 

5. The system effectiveness is approximately

 

a.0.514

b.0.524  

c.0.534

d.0.544

e.0.554

 

1. The following questions demonstrate an understanding of Systems Engineering Concept. Please be specific in your responses.

 

 

1. You studied various systems engineering approaches / models in SE courses. You also learned that the systems engineering approaches can be (mostly are) tailored to fit the uniqueness of an application (area). The two well-known modifications of systems engineering are FAA and NASA Systems Engineering models / approaches. The purpose of this question is to challenge your Systems Engineering knowledge / concepts acquired in SE courses to see how well you can contrast the two approaches (FAA and NASA) and how they compare to what is represented in Blanchard & Fabrycky’s Systems Engineering & Analysis 5^th Edition and/or Systems Engineering Principles & Practice, 2nd edition by Kossiakoff,Alexander & Sweet,William N.

NASA’s operation is one that is focused on technical excellence which is guided by policies and procedures, training and interaction. According to Kossiakoff et al (2013) excellence can be acquired through accountability from the staff and responsibility for effective outcome. Technical excellence is vital to system engineering as it ensures system reliability, availability, maintainability and sustainability in the design. Additionally, effective management of the process calls for a rigid system engineering process.

On the hand, FAA with its Next Generation program aims to enhance safety and lead to efficiencies to the air space through extensive research and development as well as effective engineering processes. According to Kossiakoff et al (2013) risk analysis is vital in the system design so as to acquire customer satisfaction.

1. These days many cars come with a valet key. The idea is that you can lock your valuables in the trunk and the valet key is just to open the doors and start the ignition (so that your valuables are safe in the trunk).   However, many of these cars on the road come with a valet key, but also have a lever inside the car that opens the trunk, thus absolutely defeating the whole idea of having a valet key!!!   Obviously, a failure of the system at some point in the process.

 

Now, let’s say, that VEE Model had been used to actually build these wonderful cars with valet key. Obviously, some aspect of the model had not been used properly, as it would be required in a good Systems Engineering practice.

 

What is your assessment, at what phase of the VEE Model something like the above flaw in design would / should have been identified? What specific activity within the identified (by you) phase this anomaly would / should have been caught and corrected?

 

[Don’t try to find ways to fix this ….that is not the question]

 

 

1. In the provided discussion thread, review the thread to understand the theme of the discussion thread by all participants and then see if you can do a critical review of the central theme of the thread based on at least two current academic publications.

 

[Note that the purpose of this question is not to simply summarize published articles, but to demonstrate your ability to critically review discussions in terms of some larger issue (s) of interest to the SE community to highlight the significance of the issue. Do not need to do long write up, just demonstrate the ability to understand issues in larger context of the discipline (SE) and not necessarily to write long reviews and that you know how to do cut and paste]