Design

1
Design

• Good design is good because of its
• fitness to a particular user
• fitness to a particular task
• In general, you are not your user!
• Our class will stress user centered design.

2
CAD

• Computer Aided Design
• Geometry authoring tool
• May involve both software and sometimes
  special-purpose hardware.

3
User and Task Analysis

• Identifies
• Characteristics of the potential user
  population(s), e.g. demographics, domain
  knowledge.
• Goals that the user wants to accomplish.
• Tasks that the users perform.
• May identify
• Mental models.
• Familiar metaphors.

4
Design Happens

• Bad design examples
• Range controls
• Gas cap position
• Doors
• More doors
• Most 3 button digital watches.
• Good design
• Good Design Awards

5
Beautiful Color Scheme???

• For a given lens curvature, longer wavelengths
  have a longer focal length
• Red is the longest focal length
• Blue is the shortest.
• Since to have an image focused on the retina, the
  lens curvature must change with wavelength with
  red light requiring the greatest curvature and
  blue light the least curvature.

6
Warning!

• Disks and computers will fail.
• Dont trust them.
• Version control.