User Help > Grouping Units of Work in Change Packages > Advanced Apply CP and Resync CP Concepts > Understanding Net Changes
Understanding Net Changes
The intent of the Apply CP and Resync CP commands is to propagate the net changes encapsulated in a set of change packages from the source project tree to a specified target project tree.
Net changes are a set of changes that include both the content of members and the structure of the tree itself (the tree structure is defined by the subprojects in the tree).
For example, John Riley, a developer, is propagating a set of change packages that includes two checkin operations for member ultim.txt followed by a drop operation for ultim.txt in the source tree. Windchill RV&S determines the net change is a drop of ultim.txt and so only performs that drop operation on the target; ignoring the preceding checkins.