Prepare to make a plan, translate, and then brainstorm on paper or a model?

 To put your plan in action; to make a prototype and let the user go over for the first time?

 Look back over the original task; tackle any feedback from the user?

A piece of software designed for a purpose?

A first or early model of a product that allows you to test assumptions before developing a final version?

The visual elements of a program through which a user controls or communicates with the application? Often abbreviated UI.

 The ability to understand and share the feelings of another?

How easy, efficient, and satisfying it is to use a human-made object or device?

 A person who uses an object, including software and hardware?

An extra piece of information passed to a function to customize it for a specific need?

A label for a piece of information used in a program?