Systems dynamics modeling: tools for learning in a complex world

2002 ◽  
Vol 30 (1) ◽  
pp. 42-42 ◽  
Author(s):  
J.D. Sterman
Author(s):  
Donald R. Drew ◽  
Antonio A. Trani ◽  
Lev A. Malakhoff

Author(s):  
Richard A. Burgess ◽  
Mario G. Beruvides

In their paper “Combining Systems Dynamics and Ethics: Towards More Science?” Erik Pruyt and Jan Kwakkel argue that ethics ought to play a larger role in systems dynamics and vice versa (2007). Including ethics, they contend, will add sensitivity to current systems models as well as provide guidance on how to achieve best outcomes; with respect to both efficiency and flourishing (Pruyt & Kwakkel, 2007). At first blush, such a cross pollination promises to add much needed depth of analysis to systems modeling and a higher degree of precision in ethical analyses. Not surprisingly, however, achieving such outcomes is more complex than it initially appears. Indeed, the quest for additional precision in ethical analysis is not a new one to philosophers and ethicists. The problem remains, in many ways, intractable. In Part I of this paper, the authors expand on Pruyt and Kwakkel’s thesis by examining specific insights and tools that can and should be incorporated into systems dynamics modeling. Emphasis will be placed on the mechanics of this inclusion and the resultant implications. Part II, then, focuses on how systems dynamics tools like causal loop modeling and behavior-over-time graphs can be incorporated into ethical analyses in a non-arbitrary manner. Finally, in Part III of the paper, the authors briefly discuss the ramifications of Parts I and II for engineering education; both among students and practicing engineers. The authors argue that both directions of the cross pollination have merit (especially the inclusion of ethical considerations in systems dynamics modeling) and ought to be developed further.


2019 ◽  
Vol 35 (1) ◽  
pp. 55-69 ◽  
Author(s):  
Steve Peterson ◽  
Brian Bush ◽  
Daniel Inman ◽  
Emily Newes ◽  
Amy Schwab ◽  
...  

2020 ◽  
Vol 12 (3) ◽  
pp. 1230
Author(s):  
Fabricio Casarejos

The main objective of this work is to foster long-term and regenerative perspectives on global sustainability. In pursuing this goal, this study encompasses a critical analysis and synthesis of insights from the fields of systems and resilience thinking, a conceptual framework for modeling and envisioning socio-ecological systems, and the proposition of the “flourishing within boundaries” archetype, which is conceived to provide meaningful insights regarding the essential conditions that would enable global society to flourish not just safely but also fairly. Through systems dynamics modeling, portrayed scenarios emphasize that the higher the regenerative societal change achieved, the greater the exponential behavior of the system’s speed towards promising socio-ecological outcomes. Especially for longer time horizons, the overall results reveal that the pace of the transitions associated with the societal action is inherently higher than those associated with the limiting social and ecological factors. Actions taken by individuals in the local realm and short-term time horizon may not only have immediate local effects but also a variety of innumerous ones that radiate out for years, decades, and even centuries to come. Finally, the pursuit of flourishing within boundaries relies on thinking rationally, globally, and above all, through a long-term and regenerative perspective.


Challenges ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 13
Author(s):  
Bernard Amadei

This paper explores the applicability of the agent-based (AB) and system dynamics (SD) methods to model a case study of the management of water field services. Water borehole sites are distributed over an area and serve the water needs of a population. The equipment at all borehole sites is managed by a single water utility that has adopted specific repair, replacement, and maintenance rules and policies. The water utility employs several service crews initially stationed at a single central location. The crews respond to specific operation and maintenance requests. Two software modeling tools (AnyLogic and STELLA) are used to explore the benefits and limitations of the AB and SD methods to simulate the dynamic being considered. The strength of the AB method resides in its ability to capture in a disaggregated way the mobility of the individual service crews and the performance of the equipment (working, repaired, replaced, or maintained) at each borehole site. The SD method cannot capture the service crew dynamics explicitly and can only model the average state of the equipment at the borehole sites. Their differences aside, both methods offer policymakers the opportunity to make strategic, tactical, and logistical decisions supported by integrated computational models.


1996 ◽  
Vol 118 (1) ◽  
pp. 48-57 ◽  
Author(s):  
E. P. Fahrenthold ◽  
M. Venkataraman

The development of high resolution, general purpose models of viscous, compressible flows is extremely difficult with existing system dynamics modeling tools. Published work admits to significant limitations, with regards to the treatment of flow geometry, inertia effects, or mass and energy convection. Combining a finite element discretization scheme with a bond graph based model formulation procedure provides a very general purpose tool for continuum fluid system modeling.


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