reason behind hold fixing...

[G.Satheesh Kumar]

hello everyone...

can anybody tell me that the reason behind the fixing of hold time only after routing process

thanQ

 

[YuLongHuang]

The most important reason:
Hold time violation can't be solved by adjusting the clock frequency.

This means that your chip will fail or partial work if it's true path.
Compared to this, setup time violation can be solved by adjusting the frequency with penalty of performance.
However, it still works at least for setup time issue.