You can add a ProjectPlanData as following.:
Click on Create a new Project Plandata
The following object structure will have been created.
Select Waterfall from the Development process combobox.
Enter the name MyProjectPlandaForWaterfall and save the ProjectPlanData .
Click on the button Add a new element
Select the counts from the following dialog.
The selected count will be added to the ProjectPlanData and save the ProjectPlanData
Select the Project estimations in the tree.
Click on the button Add a new element
Enter the name Estimation_II and save the ProjectPlanData
Click on the COCOMO tab. It will show the Cocomo editor of the project editor.
Select the default sub estimation. Click on the tab Info in the Setting section . Change the name as SubEstimation .
Select the SubEstimation and select the count Booking Manager .
Set the complexity of some cost factors .
The estimation for this count will be calculated.