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+If you have read and understood the previous sections, you won’t have any trouble using *Collectors* to monitor your simulation processes.
+We’ll now discuss two examples that show different ways *Collectors* can be used: You can either use one collector instance per process or let one instance monitor multiple processes at once.
+You should one collector per process if each process belongs to another class or if each process collects its data at another time. If your processes are all instances of the same class and if each instance collects data at the same time, you only need to use one collector instance. That might save you some memory.