If my utilization is 70% except optimization and physical cells what things we should consider in estimated utilization at route?

o   Buffers/inverters for optimization

o   Physical only cells added like decap, endcaps, well taps etc.

o   CTS structure adds buff/inv.

o   Blockages/halos added in floorplan.

o   Scan chain reordering, normal FF to scan FF increases area. Hold fix in Scan modes