Software engineering 18 user interface design
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This document discusses user interface design for software systems. It notes that users often judge systems by their interfaces and poor interface design can lead to errors. Most business systems now use graphical user interfaces (GUIs) which are easy to learn and use. The document advocates for user-centered design where users' needs are paramount. It outlines the user interface design process and principles such as consistency, minimizing surprises, and supporting error recovery. Design principles also include making interfaces familiar to users and providing guidance for a diverse user base.
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Software engineering 18 user interface design
- 1. Software Engineering: 18 User Interface Design Prof Neeraj Bhargava Vaibhav Khanna Department of Computer Science School of Engineering and Systems Sciences Maharshi Dayanand Saraswati University Ajmer
- 2. User interface design • 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
- 3. Graphical user interfaces • Most users of business systems interact with these systems through graphical interfaces although, in some cases, legacy text-based interfaces are still used
- 5. 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
- 6. User-centred design • The aim of this chapter is to sensitise software engineers to key issues underlying the design rather than the implementation of user interfaces • User-centred design is an approach to UI design where the needs of the user are paramount and where the user is involved in the design process • UI design always involves the development of prototype interfaces
- 7. User interface design process
- 8. UI design principles • UI design must take account of the needs, experience and capabilities of the system users • Designers should be aware of people’s physical and mental limitations (e.g. limited short-term memory) and should recognise that people make mistakes • UI design principles underlie interface designs although not all principles are applicable to all designs
- 9. User interface design principles
- 10. Design principles • User familiarity: The interface should be based on user- oriented terms and concepts rather than computer concepts. For example, an office system should use concepts such as letters, documents, folders etc. rather than directories, file identifiers, etc. • Consistency : The system should display an appropriate level of consistency. Commands and menus should have the same format, command punctuation should be similar, etc. • Minimal surprise: If a command operates in a known way, the user should be able to predict the operation of comparable commands
- 11. Design principles • Recoverability: The system should provide some resilience to user errors and allow the user to recover from errors. This might include an undo facility, confirmation of destructive actions 'soft' deletes, etc. • User guidance: Some user guidance such as help systems, on-line manuals, etc. should be supplied • User diversity : Interaction facilities for different types of user should be supported. For example, some users have seeing difficulties and so larger text should be available
- 12. Assignment • Explain the User Interface Design, the process of UI design and the Design Principles • Thank You