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Cell delay estimation for pre route and post route

gops
How does the encounter estimates cell delay for post route and pre routes. Actually my doubt is about the load capacitance it will take for both the analysis.I think that for pre route it takes the load capacitance as the sum of both net capacitance(in the WLM) and pin capacitance of the driven cell.But for post route which load cpacitance its going to take.Is it the same as pre route OR is it the effective capacitance as seen from the driving pin?
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