The SIMetrix environment provides a facility to automatically run multiple 
 SIMPLIS analyses. Two modes are available: parameter step and Monte Carlo.
      
	
         - In parameter step mode, the run is repeated while setting a parameter 
	 value at each step. The parameter may be used within any expression 
	 to describe a device or model value.
- In Monte Carlo mode, the runs are repeated the specified number 
	 of times with random distribution functions enabled. Distribution 
	 functions return unity in normal analysis modes; but in Monte Carlo 
	 mode, they return a random number according to a specified tolerance 
	 and distribution. Any model or device parameter may be defined in 
	 terms of such functions allowing an analysis of manufacturing yields 
	 to be performed.