In the general science lab, after students have completed the lab, they record and analyze data to draw conclusions based on that data to determine their answer to the problem question and to evaluate their hypothesis. It is hoped that with several lab teams completed a lab, and discussions of the variables that might have affected the results, that all students will get a clear understanding of the concept in question. This however, does not always occur with a few, who still may need more. With the computational model, students can repeat the simulation if further clarifications are needed (however in the interest of time, this is rarely an availability). Students can even complete a simulation again at home for further evaluation. Simulating a lab even lends itself to a 'flipped lab' where lab work is designed, and completed at home, and the results are assessed, presented, and discussed in class.
In essence, simulations allows an unlimited access to the lab processes and the access to manipulate the variables of that lab until it is clearly understood.