Quality

• "Design should be invisible." – Beatrice Warde
• "Perfection is achieved not when there is nothing more to add, but when there is nothing left to take away." – Antoine de Saint-Exupéry
• "Usefulness, usability, and desirability: A useful design is one that people need and will use. A usable design is one they can either use immediately or learn to use readily. A desirable design is one they want." – Liz Sanders