SYSTEMSDESIGNANALYSIS 1 Chapter 18 Interface Design Jerry Post Copyright © 1997.

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Presentation transcript:

SYSTEMSDESIGNANALYSIS 1 Chapter 18 Interface Design Jerry Post Copyright © 1997

SYSTEMSDESIGN 2 User Interface Choices  Command line  Question-and-answer  Menus  Natural language  Forms  Graphical User Interface (GUI)  Goals:  Ease of understanding Match the job tasks. Layout and terminology.  Ease of use  Consistency and standards  Customizable  Minimize data entry  Key codes (ID values).  Only enter new data.  Supply editing characters (e.g., slashes in dates).  Default values  Automatic searches by first characters.  Drop-down (combo) boxes.

SYSTEMSDESIGN 3 Feedback  Acknowledge acceptance of input.  Recognize that input is in the correct form.  Notify that input is not in the correct form.  Explain a delay in processing.  Acknowledge that a request is completed.  Notify that a request is not completed.  Offer more detailed feedback.  Help options.  F1 key and Help menu.  Context sensitive help.  Tool tips.  Wizards (Wizard queries user to determine which help to offer).  Web sites.  Web forums (user-to-user support).

SYSTEMSDESIGN 4 Ergonomics  Rooms  Colors Muted tones Flat paint Minimize reflections  Lighting Use natural light. Avoid lights behind terminals for most users. Avoid fluorescent lights.  60 Hz flicker.  Can be too bright.  Good luck (lowest energy usage).  Computer furniture  Adjustable Knee height Keyboard height Monitor height  Chairs Comfortable Adjustable Back support  Displays  Adjust angles.  Adjust contrast and brightness.  Keyboards  Variety but debatable value.  Repetitive Stress Injuries (RSI).  Carpal Tunnel Syndrome (CTS).