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- Type:
- Document
- Date Created:
- 1996
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 227da936724c4223c5a64764d3922694, ca4810593b2703dcaa087957ab13af91, and 23d738ba88f8333bc39725f9cb5bd0b8
- Description:
- As with any complex system, the day to day decisions require to run a manufacturing operations systems involves the need to understand and manage the dynamics behavior associated with such systems. Without a thorough understanding of these dynamics, it is intervene and what the optimum intervention polices should be. The natural dynamics of the system play a crucial part in deciding how the management control systems should be set up. A dynamic model can be used to gain the understanding that is required to better manage operational systems.
-
- Type:
- Document
- Date Created:
- 1996
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 227da936724c4223c5a64764d3922694, ca4810593b2703dcaa087957ab13af91, and 23d738ba88f8333bc39725f9cb5bd0b8
- Description:
- The incremental view in budget formulation is still widespread today, particularly in the Public Administration context. Quite often, such an approach offers politicians an expedient to artificially inflate expected tax revenues that can budget for higher expenses and promise higher financial subsides to a wider circle of voters (i.e.: unemployed, trade unions, industrial representatives, etc.) In this perspective, budget formulation is only used as a political consensus (rather than a managerial) tool that is useful to achieve agreements on virtual objectives and, consequently only to provide votes for politicians. Moreover, particularly in the Italian Regional Government context, a lack of coordination has been observed between strategies and policies pursued by different departments, in fact, several grey or overlapping areas can be found in departmental budgets.
-
- Type:
- Document
- Date Created:
- 1996
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 227da936724c4223c5a64764d3922694, ca4810593b2703dcaa087957ab13af91, and 23d738ba88f8333bc39725f9cb5bd0b8
- Description:
- My primary research interest is in improving communication between atmospheric scientists on the one hand and the general public and policy makers on the other hand. Miscommunication is delaying the implementation of effective policy intended to mitigate global climate change caused by human intervention. Solution to the problem of global warming will have to be formulated by policy makers working cooperatively with scientific experts. This global problem will require global cooperation and solutions. If there is to be rational and effective policy regarding global warming, policy analysts and the public need to be better understand the environment. Effective communication and education are paths to better use of scientific knowledge. A higher level of understanding can lead to better analysis and design of the best policies for reducing the rate of environmental change or adapting to it.
-
- Type:
- Document
- Date Created:
- 1996
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, ca4810593b2703dcaa087957ab13af91, and 227da936724c4223c5a64764d3922694
- Description:
- The Philippine government launched the Grains Production Enhancement Program (GPEP) in selected areas of the country most suited for grain production leaving the less productive areas for the production of commercial or cash crop. One of the projects under this program is the loss of rice and corn grains from harvest until storage and compare these figures with losses estimated from researches conducted in the Philippines. In the future, periodic surveys will be done to assess the progress of postharvest technology in the country.
-
- Type:
- Document
- Date Created:
- 1996
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, ca4810593b2703dcaa087957ab13af91, and 227da936724c4223c5a64764d3922694
- Description:
- Organization design can benefit from the utilization of the current available simulation techniques. The utility is greater where new organization profiles are in experimentation phase. This work has been developed as part of a larger study (still in process) related to the experimentation that is developing in manufacturing. We are observing the creation of manufacturing units that manage, nearly independently, the manufacturing and the related supporting processes. One of the peculiar characteristics of these organizations is the way these units manage the suggestions (technical, management, maintenance) coming from the employees. The New Holland case shows the dynamics of transformation of the suggestion processing and implementation. The models developed clarified the reasons of some problems observed and suggested some possible corrective actions.
-
- Type:
- Document
- Date Created:
- 1996
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 227da936724c4223c5a64764d3922694, ca4810593b2703dcaa087957ab13af91, and 23d738ba88f8333bc39725f9cb5bd0b8
- Description:
- On inspection of the cost estimation problem it was realised that there are two equally important areas of concern which are; cost explanation, and cost accuracy. A survey of previous cost models applied within the software engineering discipline suggest that there are three distinctive groups which are labelled: The Reductionism Group; The Dynamic Group; The Systemic and Dynamics Group. Key characteristics and archetype models associated with each cost modelling group are briefly outlined. It will be shown that forecast from the reductionism and dynamics cost modelling groups are inaccurate, and their explanations of projects cost are poor. Therefore, alternative mathematical techniques need to be researched. Systems dynamics has been selected, because it focuses on explanation which is seen as a strength. The aim of this research is to develop a negotiation model that explains software project costs.
-
- Type:
- Document
- Date Created:
- 1996
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 227da936724c4223c5a64764d3922694, ca4810593b2703dcaa087957ab13af91, and 23d738ba88f8333bc39725f9cb5bd0b8
- Description:
- In the S.D. conference (1. 993), was exposed the Mistela, an integrated simulation model applied to a Telecommunications Operator. This described among other questions, the forecast demand equations of traditional services with historical data (monthly, since 01. 1980 to 12. 1992), based on conventional econometric procedures. However, the provision of demand of new services can not be made by this method, and we appealed then to other kind of model. In the new version of Mistela the demand equation of a new service draws a logistic curve, Thus we appeal to Lotka-Volterra models, so of the kind predator- prey, based on the following analogy: The total market is the roof, or the saturation level, and the behaviour of each predator would be connected among them, so the pure logistic would be modified as a function of aggressivity among the services. Such aggressivity depends of the price policy, the relative quality, ...., of the market strategy in short.
-
- Type:
- Document
- Date Created:
- 1996
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, ca4810593b2703dcaa087957ab13af91, and 227da936724c4223c5a64764d3922694
- Description:
- Quick Response is a new supply chain management system designed to meet the changing requirements of an increasingly more competitive market in the apparel sector. The main objective of this study is to build a Systems Dynamics stimulation model of the portion of the textile and apparel pipeline including the retailing and wholesale processes to search for inventory decisions and policies that yield reduced costs/increased revenues in terms of the retailer. As seen in Fig. 1, the model not only includes the main components of supply chain, but also incorporates how product diversity may affect sales, There are two conflicting effects: first, as the product diversity of the store increases, the probability that customers' preferences will be matched increases towards 1.0 asymptotically. (See Fig. 2a). This graph not only makes sense, but can also be obtained by probabilistic analysis, using Binomial probabilities (Barlas & Aksogan 1995) The opposite effect of increasing diversity implies lower stocks of each product type ("Typesupply"). Thus as the ratio type supply/demand decreases, higher fractions of demand will be lost due to type stockouts. (As shown in Fig. 2b) Therefore, the conflicting effects of product diversity is potentially worth investigating dynamically.
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- Type:
- Document
- Date Created:
- 1996
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 227da936724c4223c5a64764d3922694, ca4810593b2703dcaa087957ab13af91, and 23d738ba88f8333bc39725f9cb5bd0b8
- Description:
- The main objective of this research is to construct an interactive dynamic simulation model, on which a range of problems concerning the academic aspects of a university management system can be analyzed and certain policies for overcoming these problems can be tested. More specifically, the model focuses on long-term strategic university problems that are dynamic and persistent in nature, such as growing student-faculty ratios, poor teaching quality, low research productivity. The model generates teaching, research and professional projects. To construct such a game, a systemic feedback model of the major academic aspect of a university system is built. The model consist of twelve sectors: Graduate Instruction, Undergraduate Instruction, Graduate Instruction Quality, Undergraduate Instruction Quality, Graduate Faculty Instruction Overhead, Undergraduate Faculty Instruction Overhead, Graduate Faculty Research, Undergraduate Faculty Research, Graduate Faculty Projects, Undergraduate Faculty Projects, Laboratory Facilities and Assistant sector.
-
- Type:
- Document
- Date Created:
- 1996
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 227da936724c4223c5a64764d3922694, ca4810593b2703dcaa087957ab13af91, and 23d738ba88f8333bc39725f9cb5bd0b8
- Description:
- Systems dynamics modelers normally develop models and implement findings from a deterministic perspective. This approach has great merit. It focuses attention on system structure and behavior as well as ways to change them. Once developed, however, a good system dynamics model is an excellent tool for analyzing systems behavior under a wide variety of parametric assumptions. Though such sensitivity analysis can (and should) be done manually through repeated simulation, automated tools allow more complete exploration. Moreover, they can provide information on the distribution of outcomes that strongly effects decision-making. In this paper we present the basic ideas behind doing multivariate sensitivity simulations (MVSS) and describe how these have been implemented in Vensim. Then, we present a case study that uses MVSS in the pharmaceutical industry.