Busy lines are a persistent and persuasive problem common to all telephone systems, whether it counts with the most advanced digital technology and network management or no, there will always be a period during the day on the week where telephone calls cannot be completed due to busy line with the resultant loss of revenue. If expansion programs for telephone lines were not in accordance to actual demand growth telephone calls, this problemwill grow to the point where retrials would seriously impairthe telephone system operation. This paper describes the use of a system dynamics model for designing and evaluating expansion policies that respond to actual demand and ameliorate problem.
In a world of increasing complexity and turbulence organizations run the risk to loose effectiveness as well as efficiency when managed on the base of linear thinking and shortsighted decision making. System thinking and organizational learning instead will become a prerequisite for competitiveness and survival.
Population is an element in the social system. There are a number of elements in the social systems which will influence the population growth rate. On the other hand, population growth will, in turn, exert influence on other social elements. We can, therefore, apply the system dynamics (SD) model to dealing with the problems of population control. This paper, based on the investigation carried out in Anhui Province of China, conducts a study of the policies concerning population control in China by use of the system dynamics model.
The coordination in industrial systems should be one of the major challenges for future competitive advantages. The issues of industrial system’s coordination have been studied in system dynamics at the very beginning of the field. However, system dynamicists had not put enough efforts to study the industrial “systems”. This paper attempts to use system dynamics approach to study the “dynamics complexity” issues in industrial systems. The Center-Satellite System simulation game (CSS game), which based on Taiwan’s center-satellite industrial system (a huge industrial system with over 120 Center-factories, each with up to 400 networked Satellite-factories) was developed. Future research directions are discussed.
Recent research in the field of System Dynamics has been concerned with defining archetypal structures by which toclassify insights in dynamical systems. For example, Richmond has proposed both infrastructure and activity archetypes, whereas Senge has defined eight relevsnt generic structures. Additionall,Wolstenholme has defined a number of management situations as being made up of actual outcomes which are opposed to those intended.
What is the relative importance of internal versus contextual forces in the birth and death of scientific theories? Elaborating on the analysis of a model of multiple paradigm competition and scientific development already developed by Wittenberg and Sterman, we find that situational factors present when a paradigm is launched largely determine a paradigm’s probability of rising to dominance. Stronger paradigms that survive the emergence phase live longer than their weaker counterparts, but this too is contingent upon factors present during the emergence period.
This article concerns the problems that junior college students encounter when trying to understand and utilize the concept and insights traditionally provided by the teaching of mathematics. In this context, the concept “change” is significant because it is closely associated with the ‘derivative” and the "integral” defined in mathematical analysis.
The author explores a comprehensive methods of system analysis, inference and synthesis and model sets for studying complex system. These methodologies and model sets can be used in studying the development strategy and planning of socio-economic-ecosystem. It has been successful in the study of Pudong Economic Zone of Shanghai.
Based on system dynamics, this paper creates an approach of combining qualitative and quantitative analyses, systems thinking, system analysis, synthesis and deduction with a set of models. First, We build up a generic model set with various economic indexes. About several dozen modern management methods have been applied to the different subsystems implied by their parameters and feedback structures.
In recent years many system dynamics modelers have pointed out that for effective implementation of model results it is that the client participates in the model-building process. This has lead to various more or less successful approaches in group model-building. However, up to now little systematic research has been conducted in the area of effectiveness of group model-building. Systematic evaluation of group model-building is important in order to a) understand how clients and organizations are effected by group model-building; and b) improve the effectiveness of the group model-building proces. In this paper evaluation results are presented of four model-building projects based on clients' opinions of the successfulness of these projects.