Purpose: We attempted to propose an approach to simulate the dynamics of Beijing’s logistics demand, which can do some help to find out the dynamics path of the needed storage and shipment, put forward with logistics policies and enhance logistics service. Design/methodology/approach: W e present a paper with system dynamics (SD) methodology, which was run by the software of Vensim. Findings: W...

Sex determining (SD) mechanisms are highly variable between different taxonomic groups and appear to change relatively quickly during evolution. Sex ratio selection could be a dominant force causing such changes. We investigate theoretically the effect of sex ratio selection on the dynamics of a multi-factorial SD system. The system considered resembles the naturally occurring three-locus syste...

In line with the conference theme – „Collegiality“ – the authors propose to build a bridge between two Systems Approaches, namely System Dynamics (SD) and Management Cybernetics (MC). This synthesis is aimed at opening a path for a better capability to deal with complex issues of actors in both organizations and society. With their respective strengths – modelling and simulation of content issu...

To respond to the urgent call for preventive action against COVID-19 pandemic implications for societies, this research is carried out. The main aim of our research is providing a new insight for the effects of the newly emerged restrictions by COVID-19 on the SD Goals (SDGs). This research applied a qualitative approach for supporting the SDGs achievement post-COVID in Iran, as a developing co...

Experiences with a number of field applications of system dynamics (SD) are detailed. While many of the benefits claimed by proponents of the paradigm were experienced, recommendations flowing from modelling exercises were not implemented in many cases. Moreover, simplistic prescriptions found in the SD literature (such as ensure key stakeholders are involved) were found to be impractical in va...

joint flexibility is a very important factor to consider in the controller design for robot manipulators if high performance is expected. most of the research works on control of flexible-joint robots in literature have ignored the actuator dynamics to avoid complexity in controller design. the problem of designing nonlinear controller for a class of single-link flexible-joint robot manipulator...

Managing a company requires different tools and methodologies in order to successfully deal with its intangible resources and maintain a competitive advantage. Econometrics, Agent-Based Modelling (ABM) and System Dynamics (SD) are modelling paradigms which facilitate the building of dynamic models that are characteristic of the organisational context. These three paradigms have important differ...

This paper addresses the influence of individual and group information feedback on a decision process supported by the application of system dynamics model. The experiment considered the task of strategy determination with an explicitly defined criteria function under three experimental conditions: a1) individual strategy determination supported by just Causal Loop Diagram (CLD) explanation, a2...

This paper presents an empirical study on the comparison of model building in System Dynamics (SD) and Discrete-event Simulation (DES). We study the model building process of 10 expert modellers (5 SD and 5 DES modellers), who talk aloud while building prison simulation models. The transcripts were coded based on 7 modelling topics: problem structuring, conceptual modelling, data inputs, model ...

System Dynamics (SD) can be employed for qualitative and quantitative modelling. There are important tools and methods within SD that can be easily accommodated within qualitative modeling, also known as Soft Operational Research or problem structuring method. While traditional stocks and flows are the basic components of quantitative SD modeling, quantitative SD modeling shares many commonalit...