2 User-Interface Design Goals

• Time to learn
• Speed of performance
• Rate of user errors
• Retention over time
• Subjective satisfaction

1.

Motivation for Human Factors in Design

(a)

Life-critical systems
Air traffic control, nuclear reactor operations, power utility control, space stations, police-fire dispatch, military command operations, medical instrument control, etc.

(b)

Industrial and Commercial applications

Banking, insurance, order entry, inventory management, airline and hotel reservation, car rental, utility billing, credit card systems, point of sales systems, etc.

(c)

Office, home and entertainment applications

Personal computing applications, games, educational packages, information retrieval, e-mail, conferencing, accounting applications, etc.

(d)

Exploratory, creative and cooperative systems

Distributed web databases, collaborative writing, statistical hypothesis formation, business decision making, etc.