Using System Dynamics for Simulation and Optimization of an Investment Decision System Under Uncertainty

Author(s):  
Sara Yousefi Roodsari
2021 ◽  
Vol 17 ◽  
pp. 983-996
Author(s):  
Evripidis P. Kechagias ◽  
Dimitrios M. Miloulis ◽  
Georgios Chatzistelios ◽  
Sotiris P. Gayialis ◽  
Georgios A. Papadopoulos

As countries interact more and more, technology gains a decisive role in facilitating today’s increased need for interconnection. At the same time, systems, becoming more advanced as technology progresses, feed each other and can produce highly complex and unpredictable results. However, with this ever-increasing need for interconnected operations, complex problems arise that need to be effectively tackled. This need extends far beyond the scientific and mechanical fields, covering every aspect of life. Systemic Thinking Philosophy and the System Dynamics methodology now seem to be more relevant than ever and their practical implementation in real-life industrial cases has started to become a trend. Companies that decide to implement such approaches can achieve significant improvements to the effectiveness of their operations and gain a competitive advantage. This research, influenced by the Systemic Thinking Philosophy, applies a System Dynamics approach in practice by improving the quality control process of a pharmaceutical company. The process is modeled, simulated, analyzed, and improvements are performed to achieve more effective and efficient operations. The results show that all these steps led to a successful identification and optimization of the critical factors, and a significant process improvement was achieved.


2019 ◽  
Vol 279 ◽  
pp. 01011
Author(s):  
Martin Hotový

This paper presents the use of tools and approaches of system dynamics in the analysis of the efficiency of BIM tools implementation in relation to the management and planning of investments in the construction sector. The dynamic model based on the approach of system dynamics allows to simulate the impact rate (range) of BIM implementation in strategic investment decision-making in the construction sector. Based on the analysis, the key parameters critically affecting the large construction investment projects are determined. The proposed model is implemented as a submodel in the dynamic model designed for potential refinements in the strategic planning of the extent of investments into projects of civil infrastructure of the Czech Republic. The model allows to test different strategies in the virtual world before their implementation. The prediction of future developments based on the proposed model allows to streamline planning and decision-making processes.


2019 ◽  
Vol 263 ◽  
pp. 01014
Author(s):  
Gabriel Fedorko ◽  
Vieroslav Molnár

Environmental problems are becoming more and more important in all industrial sectors. This trend is closely linked to the increase of the number and extent of solved tasks and problems. Often these are complex problems that involve the impact of a wide range of different factors. Traditional conventional methods are not suitable for their solutions. Contrary, the use of simulation and optimization tools is very effective. Their application is based on attested formulas and models, for example, the model of Lotka-Volter. It is a continuous model of system dynamics, which is used successfully in various areas. Within the frame of environmentalism, it could find application in suitable simulation tools in the questions of a solution of the problem of water and water courses protection.


Author(s):  
Dai-Lun Chiang ◽  
Sheng-Kuan Wang ◽  
Yi-Nan Lin ◽  
Cheng-Ying Yang ◽  
Victor R.L. Shen ◽  
...  

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