Thinking-actually helps the designer to avoid gif we build it they will comeh mistake.
The goal of an installation of information system must be considered/determined in the form of user experience. That is, who use, why they use, where they use, how they use, how they benefit from the system, and so on. Being easy, necessary, favorable, profitable to use are examined by this stance.
And according to this sense, the designer must consider actual people as 'users', avoiding to regard/treat people as labor (how much) or fuctions (what).
The designer simulates whether 'that person' would use the system (and how). S/he counts who and who would use it (and how), who would be uncomfortable working on the system, etc. If it seems that intended users don't come and therefore the system does not pay off, the designer stops launching the system.
In order that the designer reaches defining a clear and meaningful set of user experiences, first, s/he must understand targeted individual users. Thus, s/he practice :
minute investigation into people's actual tasks and potential need/want/requirement
distinction between need and want
distinction between what's required and what's desired
understanding that one person's necessity is another's extravagance
and so on.
In parallel, s/he tries to identify tasks that can potentially be completed using the system, determining the needs that the system could address.