On a project, it is common situation to have Cost items unrelated to any BIM element (Construction site survey, for example). Still, such items can be included in Costclassification and Costassignment in the following way:
Create a new Costitem in Cost classification as described in the section Creating a cost item → Define Code, Description and Cost of Cost item → Go to Assigneditems tab, click NewCostAssignment → Choose right Cost classification from the drop-down menu → Select a newly created Cost item → Define the Quantity in the box on the bottom of the Cost Item Picker window → Finish the process by clicking on the OK button.
Newly created Cost items will be assigned to a cost version in the same way as items linked to the elements and be included in the sum price of the Cost version.