1. Electronic Commerce Design (1)
John Wordsworth
Department of Computer Science
The University of Reading
Room 129, Ext 6544
April 2002
3CSG1

2. Lecture objectives
Describe the two aspects of requirements analysis for e-commerce systems
Outline the use of a storyboard in a visual user interface
Describe the process of creating an abstract description of a user interface
April 2002
3CSG1

3. Requirements analysis
Business requirements
Back-end systems
Transaction rates
Flexibility, or the lack of it
Consumer interface – ease of use
Storyboard
Abstract description of inputs, outputs, and expectations
Types of data in the user interface
April 2002
3CSG1

4. Storyboard – frame 1
April 2002
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5. Storyboard – frame 2
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6. Storyboard – frame 3
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7. Storyboard – frame 4
April 2002
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8. Storyboard – frame 5
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9. Storyboard – frame 6
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10. Storyboard – frame 7
April 2002
3CSG1

11. Abstract description of user interface
Identify and name the user interactions
Identify the types of data (input and output)
Identify the inputs and outputs of the named interactions
Document the user’s expectations of each interaction
Tools for documenting the user interface:
English language descriptions
Statecharts
State machines
etc?
April 2002
3CSG1

12. Key points E-commerce systems are widely used by novices
The user interface is critical to a successful e-commerce application
Storyboards are valuable aids to documenting a user interface, but are not in themselves sufficient for a specification
An abstract description of a user interface can be adapted to many different presentation devices.
April 2002
3CSG1