Setup fixing , hold fixing , noise fixing

Setup Fixing:

1. Cell swaping from Hvt  LVT

2. Upsize the bottleneck drivers(preffered buffers and inverters)

3. Split the fanout

4. Clone the critical cell

5. Clock_skewing (either launch or capture)

Hold Fixing:

1. Cell swpping to HVT in data path

2. Inserting buffer @ endpoint if setup margin is there

3. If endpoint cell area is high density route the nets in lower layers

Noise/Double Switching Fixing:

1. Applying NDR to the nets (so that space will be increase)

2. Sheilding

3. Upsizing the victim Net Driver