SIMULATION MODELING OF QUEUING SYSTEMS IN IWEBSIM
Every day, new model development systems keep on appearing in simulation modeling, that deserve attention. In particular, the rapid development of the Russian segment is worth noting. This article provides a description of Russian iWebsim structural and simulation modeling system (SSMS), which is the first Russian-language web-based application in this field. This product is partly innovative due to the fact that the simulated system is constructed without the need to download any additional software to a PC, except for standard web browsing tools. The system allows you to build graphical models and quantitative values of queuing systems (QS) functioning processes with the ability to create animated illustrations of interaction processes of transactions with the system. The article provides a description of the methodology that is implemented in the system and involves discrete-event modeling, modeling of continuous and continuous-discrete systems. It also describes the basic concepts and graphic elements used to model discrete dynamic systems in particular, as well as some features of modeling in the system and features of the system itself. As an example, single-phase single-channel M/M/1 and M/M/5 QSs were taken, their description was given, iWebsim-based structural models were demonstrated, as well as analytical (AM) and simulation modeling (SM) of the QS. A comparative analysis of the six indicators of analytical and simulation modeling for the constructed QS was carried out. Based on the comparison of these indicators, conclusions were drawn about iWebsim usability. For clarity of the fact that the iWebsim system is dynamic, a graph of the change in the average residence time of an application in the QS M/M/5 over time is given. In addition, the article provides a list of positive iWebsim features and those features that require improvements, which were identified during its study and operation, are listed. In conclusion, the article gives an assessment of the prospects for the development of the system.