There are 2 key kinds of parameters to take into account: demographics and psychometrics.

Demographics of the target group(s) are typical about numbers and facts, and include such facets as:

cultural history etc.

Psychometrics is a little trickier. This really is about specific characteristics of this typical future users of the application. You will need to develop a step-by-step portrait of these individuals. The questions that are basic your questionnaire will include, but they are not restricted to:

Which are the users like, as individuals?

just exactly What character characteristics do they will have in common?

What’s their day/week that is typical like?

What exactly are their core values?

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