On How to Lean toward Leniency: Halakhic Methodology for the Posek
One of the very serious questions that faces every posek is what degree of flexibility does he have in determining his decisions, whether in the direction of stringency or that of leniency. Is he inexorably bound by the rulings of the Shulhan Arukh, for example? Or may he take a position which is more stringent than that of the Mehaber ? (It is generally agreed that he may add stringencies to his own private practices.) Conversely, can he take a position of leniency, which would seem to contradict the standard rulings?