Babu,
Not sure what you mean by "rout case".
Can you share the screenshots?
Generally product cost collectors are created by Plant/Material/Production Version.
First you check the production version and see if the BOM/Routing details are correct.
You also talk about profitability segments during settlement. Take a look at the PA Transfer Structure (KEI2) also.
Somehow I am not able to understand the issue from your comments. Screenshots would help.
Cheers,
TD