Hi Oliver,

Personas are a powerful and widely applicable design tool, but they do
have their caveats.

Personas are more difficult to develop for consumer products as
opposed to professional applications where roles are clearly
delineated. The former requires more extensive (usually qualitative)
user research to determine the behavior patterns that underly the
potential user types, which tend to be based on lifestyle choices that
can be fuzzy and thus tricky to tease apart. Similarly, projects that
are more exploratory or blue sky in nature, e.g., the future of
television, are more difficult to apply personas to, because the
customer research necessary would need to be fairly broad (dozens of
field interviews) to yield meaningful outcomes. That said, personas
(especially when validated with quantitative research) are still very
useful to such an endeavor; the weakness lies in the amount of work
and time required to get useful results.

Personas are descriptive of behavior patterns as they currently exist.
They are not, on their own, necessarily predictors of behavior change
in the wake of disruptive technologies (though they can help designers
understand this with the right supporting data). Finally, as Adrian
points out, personas are of limited use without accompanying scenarios
that explicate context-based activities, tasks, and goals. I would not
agree that activities/scenarios are more important than personas; that
is like saying that the story line of a novel is more important than
its characters: one cannot properly exist without the other.

Robert.

On Nov 13, 2007 12:19 PM, oliver green <[EMAIL PROTECTED]> wrote:
> Hi everyone,
>
> I am trying to understand the finer nuances of using personas. The
> various articles/book chapters that I have read talk about instances
> where using personas would be useful. But I feel that to really
> understand a methodology, one should be familiar with the weaknesses
> as well. So, can you give me examples where using personas would not
> be advisable/helpful?
>
> Thanks,
> Oliver
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-- 
Robert Reimann
President
Interaction Design Association (IxDA)

Associate Creative Director
frog design
Seattle, WA
________________________________________________________________
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