PACT

Assalamualaikum..

What i learn in DFU1 (Design for usability)-

PACT

P-people
A-activities
C-context
T-technologies

People->The relevant user characteristics and skills
Activities->How is the activity currently carried out?why?what can be improved?
Context->The environment of the activity
Technologies -> What tools are used now,and how might new developments be used.

People are different from one another

Physical differences is height,weight,different capabilities in sight,hearing and touch

Psychological differences is different ways of working,different memory abilities,spatial ability,different amounts of attention at different times,ability to recognize things or remember things.Different 'mental models'

Usage differences is experts versus novices,discretionary users of technologies,differences in designing for a heterogeneous group or a homogeneous group