BCS414 71

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Chapter 7
User Interface, Input and Output Design
User Interface describes how users
interact with the system A user interface is
based on basic principles of human-computer
interaction, which describes the
relationship between computers and people
who use them to perform business-related tasks
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Processing-Centered
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User-Centered
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• User-Centered Design Principles
• Understand the underlying business functions
• Maximize graphical effectiveness
• Profile the systems users
• Think like a user
• Use prototyping
• Design a comprehensive interface
• Continue the feedback process
• document the interface design

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• User Interface Design
• based on a combination of
• Ergonomics
• Aesthetics
• Interface technology

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• User Interface Design Guidelines
• Focus on basic objectives
• Build Interface that easy to learn and use
• Provide features that promote efficiency
• Easy to obtain help or correct error
• Minimize input data problems
• Provide feedback to users
• Create an attractive layout and design
• Use familiar terms and images

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• User Interface Control
• Control features
• Menu bars
• Toolbars
• Dialog boxes
• Text boxes
• Toggle buttons
• List boxes
• Scroll bars
• Option buttons
• Check Boxes
• Command Buttons
• Spin Bars
• Calendars

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Input Device
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• Input Design has 6 main objectives
• To select a suitable input and data entry
  method
• To reduce input volume
• To design attractive data entry screens
• To use validation check to reduce input errors
• To design required source documents
• To develop effective input controls

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• Input Errors
• Data Validation Check
• Sequence Checks
• Existence Checks
• Data Type Checks
• Range Checks
• Reasonableness
• Validity Checks
• Combination Checks
• Batch Control

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Design Data Entry Screen
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Source Documents
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Output Design Issues
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• Types of Reports
• Detail Reports
• Exception Reports
• Summary Reports

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Report Design Principles
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Printer Spacing Chart
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Printing Volume and Time Requirements