Feasible solution space defined by inequalities (Eqs. (16) and (18)). The rectangle represents the bounded domain of dose (F1 · F2) and asymmetry (F2/F1). The four corner points correspond to extreme combinations. The most favorable setting is found at minimum dose and maximum asymmetry (Indicated with a Green star), while the least desirable of the optimum conditions is at maximum dose and minimum asymmetry (indicated with a Red star). The vertical and horizontal lines illustrate intermediate trade-offs across dose and asymmetry, from which a proper optimum is derived (blue marker), located near Solution 4.