An interface facilitates user input of quantitatively weighted recommendations, including weighted factors in support of decision choices. A user input mechanism allows a user to specify a factor in support of a choice, and to specify values for quantitative parameters associated with the factor along two or more axes. An overall quantitative weight for the factor is generated based on the specified quantitative parameters. In one embodiment, a graphical user interface is presented, wherein the user specifies the values for the weighting parameters by dragging a movable indicator within an N-dimensional space. Each axis of the N-dimensional space corresponds to a weighting parameter. An overall quantitative weight for the factor is calculated, for example, as the product of the specified values along each of the axes. A visual indication of this calculation is presented, so as to provide an intuitive sense of the overall weight assigned to the factor.