Placement

4) Placement:

There are two types in placement 
1) congestion driven and 2)timing driven
1   
    1)congestion driven : the congestion driven placement places the cells freely by Placing  the nets far away .so that the  congestion will be  reduced.
     
    2)Timing driven :The timing driven reduces the net length try to place the cells nearer ,so by placing the cells near by ,due to density the congestion may increase .

We will be adding global nets(tie hi and tie lo) to avoid the floating pins .

Fence, Guide and Region are the techniques to reduce the congestion of cells .


Optimization is done for drv.

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