Manipitetibn of wdre itzing, buffer sizing, and futffer inseriiai atu a few techniques that con be used to i,mproae tfune d,eloy 'in aery lorge su,le intqrction (VLSI) circuit routing- Thi* paper enhances an eri,sting approach, which is based on Particl,e Swarrn Optimization (PSO) fur sofuing rcuting poblem in VLil circaits. A hoo-step Binary Particle Swarm Optimizatdon (BPSO) apprcach, which is based on BPSO, is chosen in thi^s stuily to improue time ilelay through finding the bes...