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Assignment 1

Value: 20%

Due date: 04-Apr-2015

Return date: 27-Apr-2015

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Task

Task 1: 40 marks

Define the term ‘use case’ and explain the various types of actors in a Use Case.
Explain the difference between the <<include>> and <<extends>> relationships in use case diagrams? Give examples
Describe with examples ‘encapsulation’, ‘information hiding’, ‘polymorphism’ and ‘data abstraction’.
What is the difference between USDP and the Waterfall lifecycles in the relationship of between activities and phases?
Explain Class diagram. Outline the main steps in developing a class diagram for a Use Case(UC).

Task 2: 60 marks

Task-2 of this assignment uses the Case Study based on an Interview contained in a separate document (Please see the details in page 221 of your text book). Carefully read this case study. You are required to answer the following questions based on the Case Study.

It is expected that answers to the assignment questions be succinct and MUST be written your own

words.

Question 1: (20 marks)

Describe UCs and write full use case description for the following UCs:

Start line run
Record employee joining the line
Record employee leaving the line
Stop line

Question 2: Communication diagram ( 20 marks)

Prepare a communication diagram for each of the UC in Q1 and also include justification of the objects included in the diagram(s).

Question 3: Class Diagram (20 marks)

Draw a class diagram based on the information supplied in the case study and the communication diagrams drawn in Question 2.

Online submission via Turnitin is required for this assignment.

Rationale

This assessment task covers the fundamentals concepts of object modelling, activities of SDLC, use cases, dynamic models and has been designed to ensure that you are engaging with the subject content on a regular basis. More specifically it seeks to assess your ability to:

Introduction to Information System (IS) and the challenges in developing IS
IS life cycles, methodologies and development tools
Object orientation and modelling concepts
Requirements analysis and Use Case (UC)
Requirements model and object interaction

Marking criteria

No	Criterion	Max Possible
	TASK 1 : 40
1	Correct definition and explanation of the role of use case (UC) (3marks) and various types of actors with description (3 marks)with at least one reference and proper referencing.(1 mark)	8
2	Correct and concise explanation to differentiate between the(4 marks) terms with supporting reasons ( 2marks). At least one reference and appropriate referencing (2marks)	8
3	Correct and concise description (5marks) and one example each (2 marks)- at least one reference and appropriate referencing(1 mark)	8
4	Correct and concise description of differences(4 marks) with rationale (2 marks)- at least one reference and appropriate referencing (2 marks)	8
5	Correct explanation of class diagram and its developing steps. At least one reference and appropriate referencing	8
	TASK 2: 60
1	Correct format of full use cases of UCs based on given case study 1x4	4
1	Correct and complete description of UCs in relation to the case study 4x4	16
2	Correctness of the communication diagram 2.5x4	10
2	Justification for each use case 2.5x4	10
3	Correctness and completeness of Class Diagram	20
	Total marks	100

Presentation

The answers to all the questions and diagrams must be presented in neat and professional manner. Use case description must be as per format covered in the class.2