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Full-Text Articles in Business
Sensitivity Analysis And Optimization For Selected Supply Chain Management Issues In The Company – Using System Dynamics And Vensim, Elżbieta Kasperska, Elwira Mateja-Losa, Rafał Marjasz
Sensitivity Analysis And Optimization For Selected Supply Chain Management Issues In The Company – Using System Dynamics And Vensim, Elżbieta Kasperska, Elwira Mateja-Losa, Rafał Marjasz
Journal of Entrepreneurship, Management and Innovation JEMI
The aim of our paper is to present the new results of research work on optimization and simulation for some logistic problems in the company. The System Dynamics (SD) method and the Vensim simulation language are applied in order to solve specific managerial problems described by Forrester in the model of supply chain. The historical model of Customer-Producer-Employment System by Forrester (Forrester, 1961) has not been examined with the sensitivity analysis, from the “automatic” testing perspective. Optimization experiments have not been conducted, either. It is surprising, since the model is old and widely known. The opportunities offered by the Vensim …
Exploring Alternatives For Sustainable Development In The Tamiahua Wetlands, Luis Felipe Luna-Reyes, Jorge A. Durán-Encalada, Erick R. Bandala
Exploring Alternatives For Sustainable Development In The Tamiahua Wetlands, Luis Felipe Luna-Reyes, Jorge A. Durán-Encalada, Erick R. Bandala
Journal of Entrepreneurship, Management and Innovation JEMI
This article presents a preliminary System Dynamics model developed to analyze the sustainability of a natural reserve in Mexico: the Tamiahua Wetlands. Wetlands are often referred to as nature’s kidneys because they filter contaminants from water. In spite of their importance, wetlands are endangered areas around the world. In order to build the model we take into account the Fishbanks model developed by Meadows (2004) as a starting point. Then, the model considers variables related to changes in total and economically active populations, and contaminants in water. The preliminary model presented in this study implies that fishing activity in the …
Context And Animacy Play A Role In Dynamic Decision-Making, Magda Osman, Alexandros Ananiadis-Basias
Context And Animacy Play A Role In Dynamic Decision-Making, Magda Osman, Alexandros Ananiadis-Basias
Journal of Entrepreneurship, Management and Innovation JEMI
Perception, judgment, and reasoning are all processes that are sensitive to cues to animacy (i.e. the presence of signals that indicate an object behaves as if it has intentions and internal goals). The present study investigated the following question: Does animacy facilitate decision-making in a dynamic control system? To address this, the present study used a dynamic decision-making task and compared behavior in four different contexts (Abstract, Animate-Social, Inanimate-Social, Inanimate- Non-social). Participants were randomly allocated to one of these contexts, and in each version they were required to learn to manipulate variables in order to bring the dynamic system to …
Validation Of System Dynamics Models – A Case Study, Justyna Lemke, Małgorzata Łatuszyńska
Validation Of System Dynamics Models – A Case Study, Justyna Lemke, Małgorzata Łatuszyńska
Journal of Entrepreneurship, Management and Innovation JEMI
The purpose of this article is the analysis of the system dynamics model validation illustrated by the example of a model of the manufacturing resource allocation. In the first part of the article the authors present an overview of the definitions of validation and verification that can be found in the reference literature. Also, they emphasize the role which validation and verification play in the modeling process. Furthermore, they discuss the techniques of system dynamics model validation with particular focus on tests of the model structure, behavior and policy implications. The second part of the article contains an example of …
The Modeling Process Of The Materials Management System In A Manufacturing Company Based On The System Dynamics Method, Małgorzata Baran
The Modeling Process Of The Materials Management System In A Manufacturing Company Based On The System Dynamics Method, Małgorzata Baran
Journal of Entrepreneurship, Management and Innovation JEMI
The article presents the steps of modeling of the material management system in a manufacturing company. First, the modeling procedures indicating by Forrester, Łukaszewicz, Souček, Tarajkowski and Sterman were described and the essence of materials management in a manufacturing company was presented. Next, modeling of the materials management system was shown - step by step. Initially, the variables of the mental model connected with materials were defined, then variables in casual loop diagrams were linked. Diagrams were transformed into a simulation model that has been verified. The validation of the simulation model was conducted by using the following methods: assessing …