5.1.1 – Run Tab
Run length The length of time for running the simulation. You may use any constant or expression to indicate the length of time the simulation will run.
The longest a model can run a simulation for is 71,582 hours or 2,982.6 days or 8.17 years approximately. The smallest time allowed is.06 seconds, .001 minutes, or .000017 hours.
Warmup length The length of time to run the simulation before collecting statistics. Many systems require a time to warm up before they are running at a steady state, and if you collected statistics during this warm-up period, your results would likely be skewed. This option allows you to define that time to allow your model to warm up before you begin collecting statistics. Again, any constant or expression may be used in this field. The scoreboard values will reset after the warmup period ends. This is the designed purpose of the warm up length.
The longest warm-up length allowed is 2,270 hours.
Replications The number of replications to run for increasing the statistical significance of output results. If your model has any random behavior defined using one or more probability distributions, the simulation results will also be random. Running multiple replications allows you to use a meaningful sample size when interpreting the results since each replication uses a different seed to generate random numbers.
Report time units Allows you to select the default time units to use when you run the model.
Show Animation If checked, the process will be animated during the simulation. Disabling the animation enables the simulation to run faster and consumes less memory.
Show Scoreboard Check to display basic performance measures (entities processed, value-added time, etc.) during the simulation.
Scoreboard Time units Allows you to select the time unit displayed in the scoreboard at the time of simulation.
Disable subprocesses Causes the simulation to be run the main model only (no submodels are executed). Individual submodels can be disabled in the Activity dialog.
The ProcessModel simulation clock runs straight time using 24 hour days, 7 days per week. If there is a need to avoid the shift files to compensate for evenings and weekends, just run straight work time (not being concerned with the “day of week”), it can reduce the simulation run length to 40 hours per week. For example, a normal 7 day work week is 168 hours (7 x 24). To run a model without shift files for 4 weeks, using a 5 day workweek at 40 hours per week, reduce the run length from 672 hours (4 x 168) to 160 hours (4 x 40). Caution: Daily Pattern or Scheduled arrivals can not be used with this technique because the clock is no longer tracking 24 hour days. Continuous, Periodic, or Ordered arrivals will need to be used.