A method for structure design including detecting, by a processor, a tip-to-tip (T2T) structure design violation for a metal layer above (Ma) a via (Vx) at a tip of the Ma for a design file layout for the structure. Upon detection of the T2T structure design violation, retargeting, by the processor, of the Vx based on adjusting of both the Ma and a metal layer (Mb) below the Vx that connects the Ma through the Vx for the design file layout of the structure to improve performance of the structure based on fixing metal tip or metal ending across cell boundaries.