An embodiment of the invention provides a method for source control in a program, wherein the program includes hierarchical files for execution of processes, wherein the hierarchical files include parent files and child files. A revised process selected by a user on a graphical user interface is identified; and, files in the revised process are identified. The files in the revised process are locked with a source control processor. This includes disallowing revisions to the files in the revised process. One or more files that are descendents of a file in the revised process are identified. The one or more files that are descendents of a file in the revised process are locked with the source control processor. This includes disallowing revisions to the one or more files that are descendents of a file in the revised process.