The EX stands for exponential, the first 1 says that the parameter giving the average time is the first parameter in the experimental file. The second 1 says that we should use as random number seed the first random number in the experimental file. Finally the number of entities to be created is 100. We will not mark the block, and we will go DIRectly to the next block. In the next block, we will set values for some of the attributes.
Time is a little different in simulations.
There is an internal clock that moves as the entities travel through the system. Note that this means we will use the second parameter and the second random seed in the experimental file. Again we will go DIRectly to the next block. Don't forget to release the resource after use so some other entity can use it. The queue can also have a capacity.