Hi
Yes..I think Rajneesh is correct..in more clarity I want to put some added points....
We can make cost estimation by using BOM & Routing/Recipe for any material or without BOM & Routing/Recipe. !st one is based on qty structure explosion and second one is just manual data entry for cost estimation without depending on BOM & Routing...Now when you you go for any cost estimation system will verify whether there is any cost estimation already exits or not based on qty structure if this box is ticked...so definitely give you the message.
kamal