Hello Sabarinathan,You can implement Variant configuration in order to achieve all of your goals, where these characteristics can be entered in Sales Order and get copied to Production order automatically with the corresponding components.as for your...
you need to re-read your data from the product cost collector, set deletion flag on it, remove the rem profile from your material, change the rem profile, assign it back in material master then go to product cost collector and create/cost it
that is why you need to remove costing relevancy indicator from your line item, the system will not take this line into consideration if the costing relevancy indicator is 0%