StimPlan includes a "batch" capability to allow multiple simulations to be run unattended. You can generate multiple geologic models and pump schedules in "Simulator Data" with different inputs. Then, go to "Run Multiple Pump Schedules" as seen in the picture below. Select the geologic model and pump schedule for each run. StimPlan will run those cases in sequence. After each run, the results will be saved automatically for you to retrieve later on. For more information, please search "Batch File Capability" in the StimPlan help files.