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- Type:
- Document
- Date Created:
- 1987
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 83d7d84d4a906b77a877f50ccddf0ccd, and ef456d2a6c943c510d5169405dfd9416
- Description:
- Accounting Dynamics (AD) is a methodology for the modelling and simulation od accounting using System Dynamics. Accounting identifies and measures economic transactions of an entity, and communicates these data to both internal and external decision makers. Thus it may be said that accounting controls resource allocations in social systems. In this context a simulation model described in terms of accounting will be very effective in order to analyze and project the behavior of social systems. In our model we emphasize the structure-dependent nature of System Dynamics. The AD model depicts the structure of accounts in an economic entity. The structure of accounts reflects charge-and-discharge relationships of accountabilities. Therefore the AD model seems to have a close relationship to the real world. The definition of accounting by R. Mattesich, i.e., the method of quantitative description and projection of income circulation and of wealth aggregates in macro and micro economy (Mattessich 1964), will be best met by AD. And accounting principles will be tested for their validation by the AD model simulation. The AD model will be able to be built at various levels, e.g., industrial, urban, national, in social systems. In our first approach, we have focused on the industrial level, and we have made a prototype of AD corporate model in a business entity. We will suggest critical issues in the application of the AD model for higher levels of social systems.
-
- Type:
- Document
- Date Created:
- 1987
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 83d7d84d4a906b77a877f50ccddf0ccd, and ef456d2a6c943c510d5169405dfd9416
- Description:
- The well established theory and methodology of the assurance sciences, especially the probabilistic reliability and availability theory, is applied to the modeling of the dynamics of innovation adoption processes. In particular, this approach allows one to model the dynamics of the diffusion of innovations through complex organizational decision networks. The approach taken here is an analytic one. However, it provides a logical framework for dynamic computer aided approaches. As the management and control of the dynamics of the innovation adoption are becoming increasingly important, obvious extensions of this approach are in the direction of optimal control systems concepts and applications. A number of empirical examples from the American automobile and steel industries are discussed.
-
- Type:
- Document
- Date Created:
- 1987
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 83d7d84d4a906b77a877f50ccddf0ccd, and ef456d2a6c943c510d5169405dfd9416
- Description:
- The paper analyses the system of Tianjin Can Industry using System Dynamics method. It puts forward suggestions to the development decision and planning of the seventh five year and the year 2000 of the Can Industry. The model simulates and analyses emphatically the returns on various investment and the efficiency of various developing products, which should be a reference for the decision-maker.A new idea of using Optimal Technology to optimize the System when the model simulation is carrying on is brought forth in the paper, and good results are obtained.
-
- Type:
- Document
- Date Created:
- 1987
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 83d7d84d4a906b77a877f50ccddf0ccd, and ef456d2a6c943c510d5169405dfd9416
- Description:
- The purpose of this paper is to explore the thought criteria of modelling in system Dynamics.Thought criteria of system dynamics has appeared as a dynamic theory in the field of economics. This field has three characteristics: nonlinear fluctuation, time delay and qualitative transformation. These characteristics constitute the basis of model building in system dynamics.The concept of thought criteria is based on the process of cognition: Study of subject-- Modelling—Understanding of object. It is closely associated in series with interactive elements of the system. The modelling has been inspected in practice as a transitional link between subject and object so that modelling has turned into a cognitive and analytical method and will be used, first, to carry out simulated tests of the prototype and thus deepen our comprehension of it; secondly, to compare the specific properties of theoretical and experimental systems with those of the real system, and by means of the result from these comparisons, to improve a causal relation loop; and thirdly, to show a tendency to pass from qualitative analysis to quantitative analysis, thus leading to the combined assessment of the system. The rules of the combined of the application of the system model are identification, interchangeability, controllability, and availability.
-
- Type:
- Document
- Date Created:
- 1987
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 83d7d84d4a906b77a877f50ccddf0ccd, and ef456d2a6c943c510d5169405dfd9416
- Description:
- The consumption of resources and the environmental pollution caused by the discharge of waste materials and waste heat occur as useful products are being turned out in the social-economic activist activities. Based on the concept of entropy, the paper deals with the impact of tech-progress on every link of this process. This is the major mechanism for the impact of tech-progress on economics.
-
- Type:
- Document
- Date Created:
- 1987
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 83d7d84d4a906b77a877f50ccddf0ccd, and ef456d2a6c943c510d5169405dfd9416
- Description:
- In this study, we have selected chiba prefecture as an subject. Chiba Prefecture is located in the Metropolitan region which is made up of Tokyo Metropolis and three prefectures. Though its local power is not so high compared with others, Chiba Prefecture has been remarkably vitalized in recent years. In order to study how the life environment of our local society will change in the near future, we have designed a local development model based on the System-Dynamics and analyzed it until 2000. The whole model is made up of 6 sectors; population, industry, land and dwelling, finance, education and medical facility. In the population sector, we have studied the change in the age structure. In the industry sector, we have analyzed the change in the structure by studying agriculture as the representative of the secondary industry and tourist industry and retail as the representative of the tertiary industry. Based on such kind of analysis, we have concluded the followings in 2000. the population of Chiba Prefecture will reach the level of 6.27 millions. The secondary industry will grow move rapidly than the tertiary industry, it's will become post Industry Society. The local society might become advanced-age society, we way say that our Chiba Prefecture will be relatively comfortable to live, compared to the other areas of the Metropolitan Region.
-
- Type:
- Document
- Date Created:
- 1987
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 83d7d84d4a906b77a877f50ccddf0ccd, and ef456d2a6c943c510d5169405dfd9416
- Description:
- The development and utilization of global/world models in the context of political implications of world economic trends is overviewed in terms of three streams of research, that of multidisciplinary social scientists, of the econometricians, and of the system engineers. Socio-political processes impinge on world economic trends, just as trends in turn impact on politics, both national and international. The use of simulations rich in system dynamics for the study of international affairs is found to have much potential, as documented in findings obtained by researchers throughout the world.
-
- Type:
- Document
- Date Created:
- 1987
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 83d7d84d4a906b77a877f50ccddf0ccd, and ef456d2a6c943c510d5169405dfd9416
- Description:
- The Institute of Safety and Systems Management of the University of Southern California (USC) operates a Masters of Science Program in Systems Management (MSSM) at the main campus in Los Angeles and at 70 study centers located throughout the United States, Europe and the Pacific Far East. An introductory course in system dynamics is offered as an elective in the program. The students are interested in how managers use system dynamics and in the lessons from previous applications of system dynamics in large organizations.One such application is the on-going project for the Bonneville Power Administration (Bonneville). System dynamics models are used at Bonneville to assist in the formulation of conservation policies. This paper provides a brief summary of the Bonneville project before turning to the main question of interest: What lessons from the Bonneville project are generally applicable to large organizations and worthy of attention in the MSSM program?
-
- Type:
- Document
- Date Created:
- 1987
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 83d7d84d4a906b77a877f50ccddf0ccd, and ef456d2a6c943c510d5169405dfd9416
- Description:
- This paper gives a brief account of the technical details of Chinese Character DYNAMO compiler, which follows the current DYNAMO grammar. The compiler is in the form of modules, which lays good foundation for further expansion. Taking DYNAMO as a kernel, reinforcing its internal function and statistical analysis of results, joining other programming languages, methods and modules, adding verification of model and using advanced ideas of other branches of system science, we can build a Modelling System with Chinese Character DYNAMO as the kernel. This paper gives the logic design of the Modelling System.
-
- Type:
- Document
- Date Created:
- 1987
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 83d7d84d4a906b77a877f50ccddf0ccd, and ef456d2a6c943c510d5169405dfd9416
- Description:
- Models are continually changed and altered, and it is clear that more effective techniques for accomplishing this can make modeling easier and faster. One common way that models are changed is to remove selected pieces of structure from the model. This type of model alteration can be done for debugging a model, for tuning a model, and for performing policy analysis. In this paper we present techniques that automate the processes involved in removing components of model structure. By taking out some of the drudgery of changing a model, and guaranteeing consistency in the resulting altered model, the techniques greatly enhance modeling fluency and speed. These techniques are implemented in a software package that is part of Professional DYNAMO.