Continued development Object-oriented representation of simulation concepts has been emphasized since 1980s Case-based approach: adapt existing models for new applications(implemented models In software vendor industry, emphasis has been given to the development of high-level Simulators for special application systemsContinued development • Object-oriented representation of simulation concepts has been emphasized since 1980s • Case-based approach: adapt existing models for new applications (implemented models) • In software vendor industry, emphasis has been given to the development of high-level simulators for special application systems