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Textbook in PDF format Software developed in recent years has been devoting an average of 48% of the code to the user interface [Myers and Rosson 1992]. It would thus seem justified to locate a reasonable proportion of the effort in software development projects to ensuring the usability of these user interfaces. This book tells you what to do if you decide to improve usability. The main goal of the book is to provide concrete advice and methods that can be systematically employed to ensure a high degree of usability in the final user interface. To arrive at the perfect user interface, one also needs genius, a stroke of inspiration, and plain old luck. Even the most gifted designers, however, would be pressing their luck too far if they were to ignore systematic usability engineering methods. True PDF Preface Audience Teaching Usability Engineering Acknowledgments Executive Summary Cost Savings Usability Now! Usability Slogans Discount Usability Engineering Recipe For Action What Is Usability? Usability and Other Considerations Definition of Usability Example: Measuring the Usability of Icons Usability Trade-Offs Categories of Users and Individual User Differences Chaper 3. Generations of User Interfaces Batch Systems Line-Oriented Interfaces Full-Screen Interfaces Graphical User Interfaces Next-Generation Interfaces Long-Term Trends in Usability The Usability Engineering Lifecycle Know the User Competitive Analysis Goal Setting Parallel Design icipatory Design Coordinating the Total Interface Guidelines and Heuristic Evaluation Prototyping Interface Evaluation Iterative Design Follow-Up Studies of Installed Systems Meta-Methods Prioritizing Usability Activities Be Prepared Usability Heuristics Simple and Natural Dialogue Speak the Users' Language Minimize User Memory Load Consistency Feedback Clearly Marked Exits Shortcuts Good Error Messages Prevent Errors Help and Documentation Heuristic Evaluation Usability Testing Test Goals and Test Plans Getting Test Users Choosing Experimenters Ethical Aspects of Tests with Human Subjects Test Tasks Stages of a Test Performance Measurement Thinking Aloud Usability Laboratories Usability Assessment Methods beyond Testing Observation Questionnaires and Interviews Focus Groups Logging Actual Use User Feedback Choosing Usability Methods Interface Standards National, International and Vendor Standards Producing Usable In-House Standards International User Interfaces International Graphical Interfaces International Usability Engineering Guidelines for Internationalization Resource Separation Multilocale Interfaces Future Developments Theoretical Solutions Technological Solutions CAUSE Tools: Computer-Aided Usability Engineering Technology Transfer Appendix A: Exercises Appendix B: Bibliography Conference Proceedings Journals Introductions and Textbooks Handbook Reprint Collections Important Monographs and Collections of Original Papers Guidelines Videotapes Other Bibliographies References Author Index Subject Index