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- Type:
- Document
- Date Created:
- 1992
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 68f8be4710ef70435fee8d3c8bf4c1f7, and c1647c2958efc6aa1703a2b3e2d5c65f
- Description:
- To each causal diagram, and the structure that it represents, a dynamical system can be associated. From its qualitative analysis, the behaviours associated to the structure can be deduced. This paper introduces a piecewise linear dynamical system associated to a causal diagram. Some interesting results on the qualitative behaviour of the system can be obtained from this dynamical system. In this paper a method is proposed to implement automatically the construction of a piecewise linear dynamical system to each causal diagram, the study of its equilibria and its stability. This allows us to obtain, automatically, the behaviour modes associated to a causal diagram.
-
- Type:
- Document
- Date Created:
- 1992
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 68f8be4710ef70435fee8d3c8bf4c1f7, and c1647c2958efc6aa1703a2b3e2d5c65f
- Description:
- This paper explores the advantages of System Dynamics as an enquiry method for analysis of blood bank management Systems which exhibit far reaching social implications. Causal loop diagrams are developed connecting various system components. The integration of individual causal loops is presented in the form of an influence diagram representing the ‘dynamics’ of a blood bank. Simulation model is built on the basis of causal loop diagrams. The system response exogenous disturbances or policy changes are analyzed. The catastrophe model of blood bank system is developed and the parameters forming the control surface and behaviour surface are correlated with those of the System Dynamics model.
-
- Type:
- Document
- Date Created:
- 1992
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 68f8be4710ef70435fee8d3c8bf4c1f7, and c1647c2958efc6aa1703a2b3e2d5c65f
- Description:
- We gave a report on the model for dental diseases at the 1987 System Dynamics Conference. The model consists of 4 sectors: demography, cavities, pyorrhea and baby teeth. The demographic sector covered population of 5 three-year age groups under 14 years of age and 13 five-year age groups above 15 years of age. The cavities sectors and pyorrhea sector were composed of population of five-years age groups, on the other hand, the baby teeth sector used population of three-year age groups.From the total number of defective teeth, total dental costs in Japan were calculated annually from 1963 and projected to 2025. We added to this model a new level variable which is technology (rate variables and multipliers) in order to demonstrate to the effect of technology on the other level variables. New simulation results will be reported at the International System Dynamics Conference this year.
-
- Type:
- Document
- Date Created:
- 1992
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 68f8be4710ef70435fee8d3c8bf4c1f7, and c1647c2958efc6aa1703a2b3e2d5c65f
- Description:
- Organizational learning is intrinsically systemic, because it deals with changes in thinking and acting not only in individuals, or in teams, but organization-wide. Our ability to understand and improve organizational learning will depend on having an operational systems framework, which can both sharpen theoretical insights and address practical management concerns. Building on past work in organizational learning and system dynamics, the new Center for Organizational Learning at MIT is attempting to develop a rigorous foundation of systems principles and methods so that current interest in organizational learning and “ learning organizations” can lead to significant advances in management theory and practice.
-
- Type:
- Document
- Date Created:
- 1992
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 68f8be4710ef70435fee8d3c8bf4c1f7, and c1647c2958efc6aa1703a2b3e2d5c65f
- Description:
- System Dynamics has not achieved widespread recognition as a paradigm of substance in the business-related disciplines of Strategic Management, Organization Behavior, Organization Theory, or Operations Management. One reason for its slow acceptance by academicians in these fields and related social sciences may lie in the specialized meanings and usages attached to common words by the System Dynamics lexicon. Words such as “open,” “closed,” “feedback,” and “structure” -- used differently than established scientists might expect --may create perceptions that System Dynamicists simply don’t understand systems theory. Writers in the field need pay special attention to the semantic implications of their presentation.
-
- Type:
- Document
- Date Created:
- 1992
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 68f8be4710ef70435fee8d3c8bf4c1f7, and c1647c2958efc6aa1703a2b3e2d5c65f
- Description:
- To the date, Budget Plan definition in Italian public companies is approached with insufficient deepness. We believe this is common to other countries too.Indeed, most public organizations develop the Budget Plan basing themselves only upon the available data and not upon knowledge acquired in years of experience. Balance sheet data are therefore obtained simply adding to the previous information, an amount estabilished, for example, on the expected inflation rate.This approach although “trivial” supports the budget responsible, because during the budget presentation, very few elements can be effectively criticized. It is commonly accepted that also public companies find themselves in turbulent environments. This is due to both the increased number of endogenous variables, and to the complexity of exogenous parameters. Therefore the Budget Plan definition becomes always more critical, and consequential difficulty of its evaluation assumes relevant importance.The paper describes an experiment carried out by an Italian Public company which is adopting a dynamic economic- financial model for both, Budget Plan definition and for its evaluation. The model is based upon System Dynamics approach and evaluates a series of scenarios providing support to the budget definition responsibles in taking strategic policy decisions, and better “explaining” the effects of decisions undertaken.
-
- Type:
- Document
- Date Created:
- 1992
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 68f8be4710ef70435fee8d3c8bf4c1f7, and c1647c2958efc6aa1703a2b3e2d5c65f
- Description:
- This paper describes a case study of applying organizational learning principles to the strategic change of a large German automotive company which seems to be successful alternative to the usual top-down approaches. Different models of implementing change processes are discussed, and their adequacies are assessed regarding to the degree of supporting self-transformational processes within the organizational.
-
- Type:
- Document
- Date Created:
- 1992
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 68f8be4710ef70435fee8d3c8bf4c1f7, and c1647c2958efc6aa1703a2b3e2d5c65f
- Description:
- Since formal modelling requires having a model boundary encompassing finite complexity, so deductive logic is possible, complex problems must be partitioned into simpler parts before being analysed. There are many ways to slice a complex problem but not all create partitions that keep together processes contributing to effective policy design. This paper explore ways in which a complex problem may be appropriately sliced so the models of the partitions can serve as effective tools for policy design.
-
- Type:
- Document
- Date Created:
- 1992
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 68f8be4710ef70435fee8d3c8bf4c1f7, and c1647c2958efc6aa1703a2b3e2d5c65f
- Description:
- While nonlinear combinations of multiple modes existing in complex oscillatory systems may generate chaotic behavior in real systems, the studies of chaos attempted in system dynamics have often resorted to forcing simplistic models of systems to chaos. This paper illustrates how chaotic modes have been constructed through the creation of mis-specifications and anomalies in the model structure and parameters. This process has not only reduced the models to artifacts with little relevance to problem solving but has also invariably introduced a stiff structure that is susceptible to considerable building up error as numerical integration methods are used with long simulation times. The paper concludes that a model must qualify as an empirically valid system by meeting the requirements of the normal system dynamics practice if the chaotic modes it generates are to be of practical value.
-
- Type:
- Document
- Date Created:
- 1992
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, 68f8be4710ef70435fee8d3c8bf4c1f7, and c1647c2958efc6aa1703a2b3e2d5c65f
- Description:
- The paper describes from a client point of view some experiences with system-dynamics during the first year of Nostradamus. Nostradamus is a project, which aims at simulating the senior management of a large Dutch governmental organization with an one action orientated engeneers approach to adopt a more outwardly-orientated, creative and flexible attitude. In the beginning of the project the use of system-dynamics was intended as a central guiding aid in the proces of organizational growth. The intended use proved considerably more extensive than the actual use. Insofar this regression is attributable to system-dynamics we, as a client of system-dynamics, see in this regression a possible challenge for system-dynamics. We think system-dynamics could have been a more central supporting aid in Nostradamus if we would have found well-documented experience with system-dynamics in comparable situations. We suggest the system-dynamics-society to develop certain activities in order to stimulate demand and to better link up demand and supply in the area of systems-thinking.