Adding buffer for fixing timing violations

[varundevraj]

I am trying to fix negative slack in the time violated paths and tried using interactive Eco option in the encounter to add Buffer. However its not adding any buffers. Can some one help me on how to solve negative slacks in the design and how can I add buffers in the design.

thanks
Varun

 

[cmkrishna]

Adding Buffer in aTiming violated path will further add propogation delay.You can look at Timing Report of the violated path to identify most contributing delays of gates/ nets.Optimize by up/down sizing the gates and also try rerouting nets.