This window indicates that all the elements in the deliver (or rebase) operation have been processed. Any versions that needed to be merged are merged and files that needed to be copied have been copied.
Set Open a ClearCase Explorer window to the root of the view to help you perform your testing.
Click OK to proceed. A new window opens to give you the option to complete the deliver (or rebase) operation. In the window, you can click Details to display a list of the versions. You can use the list to examine versions that are still checked out in the target view. After you finish your testing, click Complete in that window to transition the operation to a complete state.