A goal-directed problem solving activity informed by intended use, target domain, materials, cost and feasibility.

validating the ideas

provide external representations at the interface and also provide possibilities for annotation and cognitive tracing.

These have been primarily cognitive, social, and organizational

in origin.

Usability Engineers are people who.... 

Which of the following python libraries is used to scan nearby bluetooth devices ?  

Why are some objects frustrating to use? What is

the effect of this frustration on users?

Level of detail or sophistication → Define the resolution dimension, with regards to manifestation dimensions