1. April 19, 2004“Design of User-Friendly Systems” DLC, 2004 1 Design of User Friendly Systems Joel Clawson Genevieve Hudak Brock LaMeres Kitty Turner

2. April 19, 2004“Design of User-Friendly Systems” DLC, 2004 2 Introduction

3. April 19, 2004“Design of User-Friendly Systems” DLC, 2004 3 Characteristics of Objects Easy to understand Easy to interpret Contain visible clues to operation Difficult to Use Frustrating No clues/False clues Get in the way of normal thought processes on operation Well DesignedPoorly Designed

4. April 19, 2004“Design of User-Friendly Systems” DLC, 2004 4 Frustrations of Everyday Life Poor Visibility Lack of Natural Signals Poor Mappings Poor Instructions Poor Relations between old, known functions and similarly named new ones

5. April 19, 2004“Design of User-Friendly Systems” DLC, 2004 5 Psychology of Everyday Things Affordances –Plates → Pushing –Knobs → Turning –Slots → Inserting False Causality Conceptual Models

6. April 19, 2004“Design of User-Friendly Systems” DLC, 2004 6 Principles of Design for Understanding and Usability Provide a good Conceptual Model Make things Visible –Provide good mappings –Provide natural relationships –Don’t overload a control Provide Feedback