B. Simulator
A great number of simulators are either continuous or discrete. Since in software projects both mechanisms are presented, we decided for a hybrid approach in which [27]:
• At a higher level of abstraction, the structure of the software process, activities, interactions and artifacts are best modeled by a discrete event approach;
• At a lower level of abstraction, the behavior of the activities and the factors that influence the simulated project are best modeled by a continuous approach.