attachment(3).ppt - BCS 2317 HUMAN COMPUTER INTERFACE MOD 3:User-Centred Design Process • • • • • • • • • • Learning Objectives User

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BCS 2317: HUMAN COMPUTER INTERFACE MOD 3:User-Centred Design Process
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Learning Objectives User interface design The user interface GUI characteristics User interface design process UI design principles User-system interaction Interaction styles Information presentation Five Design Characteristics What is User-Centred Design? © M. Rauterberg, TU/e 2
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Learning Objectives Cont.. User Involvement in the Product Creation Process Design Rules Principles to support usability Standards and Guidelines Golden rules and heuristics Nielsen’s 10 Usability Heuristics Shneiderman’s 8 Golden Rules Norman’s 7 Principles © M. Rauterberg, TU/e 3
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The user interface User interface design is designing effective interfaces for software systems System users often judge a system by its interface rather than its functionality A poorly designed interface can cause a user to make catastrophic errors Poor user interface design is the reason why so many software systems are never used Most users of business systems interact with these systems through graphical user interfaces (GUIs) In some cases, legacy text-based interfaces are still used © M. Rauterberg, TU/e 4
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GUI characteristics © M. Rauterberg, TU/e 5 Characteristic Description Windows Multiple windows allow different information to be displayed simultaneously on the user’s screen. Icons Icons different types of information. On some systems, icons represent files; on others, icons represent processes. Menus Commands are selected from a menu rather than typed in a command language. Pointing A pointing device such as a mouse is used for selecting choices from a menu or indicating items of interest in a window. Graphics Graphical elements can be mixed with text on the same display.
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GUI advantages They are easy to learn and use. Users without experience can learn to use the system quickly. The user may switch quickly from one task to another and can interact with several different applications. Information remains visible in its own window when attention is switched. Fast, full-screen interaction is possible with immediate access to anywhere on the screen © M. Rauterberg, TU/e 6
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User interface design process © M. Rauterberg, TU/e 7 Executable prototype Design prototype Produce paper- based design prototype Produce dynamic design prototype Evaluate design with end-users Implement final user interface Evaluate design with end-users Analyse and understand user activities
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UI design principles i) User familiarity The interface should be based on user-oriented terms and concepts rather than computer concepts E.g., an office system should use concepts such as letters, documents, folders etc. rather than directories, file identifiers, etc.
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