“…Verification -Most researchers define verification as referring to the performance of the program code, for instance, as "the process of checking that a program does what it was planned to do" (Gilbert and Trotzsch, 1999, p.21), or "checking that the representation is faithful to the simulator's intentions" (Edmonds, 2003, p.108); Validation -According to Gilbert and Troitzsch (1999, p.22), "While verification concerns whether the program is working as the researcher expects it to, validation concerns whether the simulation is a good model of the target", or, according to Edmonds (2003, p.108), that "the expression of the simulation in terms of outcomes is faithful to the relevant social phenomena. "…”