Design of the Conceptual Model

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Design of the Conceptual Model

• Winograd, Chapter 2

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David Liddle

• Xerox PARC
• Vice President - IBM
• Instructor at Stanford
• Recently employed by various venture capital firms

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Xerox Star(Why was is cool?)

• Direct manipulation of objects
• WYSIWYG
• What You See Is What You Get
• Consistency of commands
• Generic commands

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Software Design
Determining the users experience with a piece of
software
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Users Conceptual Model

• Represents what the user is likely to think
• Metaphors
• Not connected to the physical world
• Recognition (not recall)
• Spreadsheets, desktops

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Prototyping and User Trials(In the development
of Xerox Star)

• Build prototypes that users can test
• Get users feed back
• Alter the specification
• Repeat