Other then default calendar days If you select any different working days or non working days it doesn't make any difference for Schedule Assistant to consider those updated days therefore pattern still follows the original calendar. Similarly if you change the time window, it still doesn't make any difference to underline pattern or requirement detail therefore schedule assistant still uses the originally created requirement detail and searches for the resources qualifying that originally defined pattern. This requires fixing. The only functionality that works in this window is Timezone setting which is of little use.