Best process for recompile of cobols

Just curious -- what are your procedures for when you are doing tax updates and have cobol compiles to perform?  It seems like we have a process of copying the src\base and src\win32 (or what ever folder) to a temp compile folder.  The next step is to copy the source from the project from the tax update and then run the cobol compile process.  Is this close to your procedures?  Is it documented somewhere as to what the correct process should be?