ABSTRACT
This chapter highlights the system dynamics (SD) methodology and presents its applications for modeling and simulation of the HIV-infected population. System engineering is a formal awareness of the interaction between the parts of the system. The interconnection, the compatibility, the effect of one upon the other, the objectives of the whole, the relationship of the system to the users, and the economic feasibility must receive even more attention than the parts, if the final result is to be successful. In management as in engineering, they can expect that the interconnection and interaction between the components of the system will often be more important than the separate components themselves. The nature of managerial and socioeconomic systems and their associated problems are examined in terms of their counterintuitive behavior, nonlinearity, and SD. The managerial and social systems are governed predominantly by endogenous relationships rather than the external influences.
