Completeness and efficiency as a function of the number of visits (N_visits) for different fiber-positioning systems (tilting spines, dual rotator, pick-and-place, and starbugs) within a 1﹩\mathop{.}\limits^{{\unicode{x000b0}}}﹩0 diameter (0.785 deg²) FoV, except for the FLEX system. For FLEX, a 0﹩\mathop{.}\limits^{{\unicode{x000b0}}}﹩5 diameter (0.196 deg²) FoV is adopted. The left panel in each row shows completeness (%), while the right panel shows efficiency (%). The top panel corresponds to 500 targets and the bottom panel corresponds to 1000 targets, respectively, for different fiber densities. As N_visits increases, completeness improves, approaching 100%, while efficiency decreases due to fiber reallocation constraints. The trends vary across different positioning systems, reflecting their relative performance in fiber assignment for different target densities.