The Trials Calculator recommends a number of runs to use for trials.
Access the Trial Calculator from the drop down menu on the Trial button on the Home tab.
The recommendation is based on your required precision of the confidence limits around the estimate of the mean for your simulation results (KPIs).
Add all the KPIs (from the left hand box into the right hand box) that you want to meet the required precision.
For more information on how the Trial Calculator works, and information on other related research see: http://www.wbs.ac.uk/go/autosimoa