Strategical and tactical vision

It is right that people may consider a chess plan, a plan choise during the unfolding of a chess game, as an evident part of chess strategy and tactics. In fact many agree that it is impossible to realize a correct and efficient chess plan without both a clear strategical and tactical vision. But, on the other hand, many chess players used more or less correctly the impressive theoretical arsenal, today at their disposal, without, in thesame time, being able to conceptualize elaborate an accurat plan. This usual deficiency is the main reason for which some trainers focus  all attention on this crucial feature of the modern chess theory view point.