Sequence diagrams and design class diagrams

PART A: DESIGN CLASS DIAGRAM AND SEQUENCE DIAGRAMS

1. Create a preliminary version of the design class diagram (first-cut design class diagram) for the Car Sharing IS. This requires that you (a) elaborate class attributes, and (b) add navigation visibility arrows (see pp. 308–314 in the textbook). See Figure 10-16 on p. 314 of the textbook for an example of the output of this step. Do not submit the first-cut design class diagram from the textbook!

2. Develop first-cut sequence diagrams to explain object interactions for the “Make Reservation through Web Interface” use case (see pp. 332–344) of the textbook, and follow the “Guidelines and Assumptions for First-Cut Sequence Diagram Development” on p. 344.

3. Develop a multilayer design for the “Make Reservation through Web Interface” use case. Follow the process in “Developing a Multilayer Design” on pp. 345–349 of the textbook.

4. Update the design class diagram by adding method signatures. Don’t forget to include all methods (see discussion on pp. 351–353 of the textbook) and any controller classes required. See Figure 11-18 on p. 352 for an example of what is required.

Part A is worth 80 marks. Marking criteria are completeness and correctness of

 sequence diagrams (40 marks)

o controller, boundary/view, data access classes (16 marks)

o methods – signatures, data passed/returned (8 marks)

o interactions – describe scenario completely and correctly (16 marks)

 design class diagram (40 marks)

o attributes (8 marks)

Page 3 of 4

o visibility – navigation (8 marks)

o methods (16 marks)

o controller classes (8 marks)

The organization and presentation of information are part of the interpersonal and communication skills required of systems analysts.

PART B: ESSAY QUESTION

The design phase includes the development of several diagrams. Explain why that many diagrams are needed and what the purpose/value of each of them is. Make sure that your description clearly states the need for each diagram and that it is therefore clear how this diagram is different from others.

Answer the questions above, using overall 300–400 words. Being able to answer questions precisely is part of the interpersonal and communication skills required of systems analysts; therefore, meeting the word limit is important.

Answers consisting of more than 400 words will be marked with 0 points, and answers of less than 300 words will receive reduced marks proportionate to the length of the answer.

Make sure that your answer is written in your own words rather than being copied either from the textbook or from another source! Cite the sources you use in your answer, and provide references. There should be at least two references in your answer, and at least one of them should not be the textbook. If you are not sure how to list and cite sources, please read “How to Cite Correctly” in the Important Resources block on the right side of the course home page.

Part B is worth 10 marks. Marking criteria are

 completeness and correctness (9 marks)

 presentation – readability, use of references, etc. (1 mark)

The organization and presentation of information are part of the interpersonal and communication skills required of systems analysts.