Combining 6 projects = combine or make subprojects - what is a must? In a perfect world they all use thesame WBS and Code Structure. But they won't, can you use different activity codes if you use sub-projects? Can the id's be the same? A mandatory structure was not in specs so it will like herding buffalo, but what is minimum must I push? Would you drag them all into one schedule with Project Code or make them sub-projects? Any good references out there to do this?