Although it is possible to set and adjust targets, start and stop the scheduler all within the Patchworks interface, this might not be practical for a multi-scenario analysis. For example, you might want to make a set of targets and analyze the results, then change one/some of the targets and again view the results. To keep track of the changes you've made and view and compare the results in a precise and consistent manner, another more sophisticated technique must be used. This will be discussed in the next chapter.