Dadanawa, While studying scenarios, by all means look at those that you feel "fit" into the ordinary possibilities, but do not avoid the extraordinary situations. In very high winds, the base turn might need to be commenced prior to reaching abeam the threshold, in order to remain within the circling area during the turn onto final. Timing is irrelevant if compliance results in busting the circling area.
It is no comfort to your widow that remaining within the circling area meant flight through unacceptable weather events like a microburst.
So it is not just a computer app, but aggressive animal survival instincts that can sometimes count.