Online Content
Number of results to display per page
Search Results
-
- Type:
- Document
- Date Created:
- 2008 July 20-2008 July 24
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, ce498623f0349395d0a141a0525190a0, and 6cbae5a21467df4434abbc87da443217
- Description:
- The purpose of the paper is to investigate the effects of unconscious versus conscious ways of making decisions in a dynamic decision-making task. An experimental setting is used to study this question; three experimental groups are distinguished: immediate decision-making (only limited time for cognitive processing), distracted decision-making (time for unconscious processing), and considered decision-making (time for conscious processing). As experimental stimulus, a simulator based on the Kaibab Plateau model is employed. Findings are not yet clear, since so far only pre-test have been conducted; the actual experiment will be run in April and May 2008. Implications might comprise the usefulness of rational methods for decision-making, for instance modeling and simulation. The value of the paper lies in the fact that it connects to a recent discussion in psychology and transfers it into a domain in the core interest of the system dynamics community: decision-making in situations with dynamic complexity.
-
- Type:
- Document
- Date Created:
- 2008 July 20-2008 July 24
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, ce498623f0349395d0a141a0525190a0, and 6cbae5a21467df4434abbc87da443217
- Description:
- Since 2005, there has been an opportunity for joint reflection about the quality of the peer review process at each conference. Last year, for the first time we talked amongst reviewers, thread-chairs, the program committee and the societys head office and policy council.
-
- Type:
- Document
- Date Created:
- 2008 July 20-2008 July 24
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, ce498623f0349395d0a141a0525190a0, and 6cbae5a21467df4434abbc87da443217
- Description:
- The paper focuses on diffusion of energy-efficient innovations. A conceptual model is developed that integrates relevant variables and mechanisms to describe and explain innovation diffusion in the building construction industry an exemplary case of a large fragmented, socio-technical system with slow transition characteristics. A considerable amount of literature has been published about innovation diffusion. However, only little attention has been devoted to integrate relevant knowledge from different disciplines to explain the complex phenomenon of innovation diffusion in the building construction industry. This study draws on accepted theories as one source of information; others are existing empirical research, expert interviews, and workshop results. The latter two are based on a case study to obtain insights from a regional industry cluster. We use the grounded theory approach for data collection, analysis and modeling. The result is a validated conceptual model including mechanisms that explain the diffusion phenomenon. The first contribution is the description and explanation of innovation diffusion in a consistent model developed by inductive and deductive analysis. Second, the model provides first insights about policy levers and hypotheses about relative importance of underlying mechanisms. Third, the model can serve as a conceptual frame for a future quantitative simulation study.
-
- Type:
- Document
- Date Created:
- 2008 July 20-2008 July 24
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, ce498623f0349395d0a141a0525190a0, and 6cbae5a21467df4434abbc87da443217
- Description:
- The real-world problem the research aims to address is the continuing highly seasonal, exponential electricity demand growth in the Greek islands that are unconnected to the national electricity grid over the past decades. This paper presents only part of the on-going research. It specifically tests an early draft of the sub-model concerned with the interplay of an islands tourism volume & attractiveness, local technological learning-by-using effects and the dynamics of demand-side equipment diffusion. The general assumption is that a tourist chooses a basket of services received at the place visited, one of which is cooling comfort. Cooling-comfort eventually translates to installed cooling capacity and in effect electricity consumption. This paper examines the sub-model which, based on a figure of cooling comfort per person, constructs an indicator of competitiveness to similar destinations and relates the flow of tourists to it. Similarly, a cost comparison incorporating a learning curve between a conventional and an efficient variant of cooling equipment drives the installation stocks at any time and effectively alters the efficiency of the overall service across the island. The sub-model is run for a number of structural and behavioural tests and also assessed for its potential use in policy making.
-
- Type:
- Document
- Date Created:
- 2008 July 20-2008 July 24
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, ce498623f0349395d0a141a0525190a0, and 6cbae5a21467df4434abbc87da443217
- Description:
- A business model is a set of assumptions about how an organization will perform by creating value for all the players on whom it depends, not just its customers. This paper discusses a multi-method approach to consistently analyzing the structure, the behaviour and the dynamics of business models in order to identify possible optimizations. The method utilizes object-oriented analysis for analyzing structural and behavioral aspects and system dynamics to analyze value creation dynamics.
-
- Type:
- Document
- Date Created:
- 2008 July 20-2008 July 24
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, ce498623f0349395d0a141a0525190a0, and 6cbae5a21467df4434abbc87da443217
- Description:
- To better understand the performance of hospital operations in response to IT-enabled improvement, we report the results of a system dynamics model designed to improve core medical processes. Utilizing system dynamics modeling and emerging HIS data, we demonstrate how current behavior within the hospital leads to a stove-pipe effect, in which each functional group employs policies that are rational at the group level, but that lead to inefficiencies at the hospital level. We recommend management improvements in both materials and staff utilization to address the stove-pipe effect, and estimate the resultant cost-saving. We believe that the major gains in health information systems use will accompany new information gathering capabilities, as these capabilities result in collections of data that can be used to greatly improve patient safety, hospital operations, and medical decision support.
-
- Type:
- Document
- Date Created:
- 2008 July 20-2008 July 24
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, ce498623f0349395d0a141a0525190a0, and 6cbae5a21467df4434abbc87da443217
- Description:
- Abstract: The scientific community has had increasing concerns for strategic understanding and implementation of food security policies in developing countries, especially since the food crisis in the 70s. The process of decision-making in the public sector is becoming increasingly complex due to the interaction of multiple dimensions related to food security. Policy makers normally use models to support their decisions. This research explores the food security process from a national approach for developing countries through the study of its three main components: The availability of food, the access to food resources and the stability of food security. It bases its study on a systemic perspective through the use of systems dynamics as means of understanding the complexity of this phenomenon as well as the (interrelation) linkage and interdependency of its factors. The study will empower the planners of local regions in the decision making process, to foresee future treats, to alleviate partly the scarcity of food and handle the mismanagement of food resources.
-
- Type:
- Document
- Date Created:
- 2008 July 20-2008 July 24
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, ce498623f0349395d0a141a0525190a0, and 6cbae5a21467df4434abbc87da443217
- Description:
- In the modern era, the advancement of Information technology requires improvement in other fields such as communication technologies, management of human resources, business environments, legal background and so on. Indicators that measure the growth of ICTs in different societies have also pointed out this importance. National legislators are always seeking means to improve ICTs and use them as enabler of industry in their countries. a number of developing countries have devoted a considerable effort in this area, but they have not achieved what they were expecting for. In recent years,Iran has made a desperate attempt to get engaged in similar activities, but according to e-readiness indicator nothing has achieved. In this paper, we take a system dynamics approach to model changes in the progress of information technology in Iran. Sources of many of the problems show up, after the simulation of the model. Also we outline a policy required for reaching a steady growth in the future.
-
- Type:
- Document
- Date Created:
- 2008 July 20-2008 July 24
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, ce498623f0349395d0a141a0525190a0, and 6cbae5a21467df4434abbc87da443217
- Description:
- Formal studies of decision threshold learning assume full feedback conditions, that is, no matter what the decision is (positive or negative), the decision maker will be provided by feedback. However, in the real world feedback may be conditional on the decision made. In this paper, we investigate how conditional feedback can result in biased decisions. First, based on signal detection theory, a dynamic model of threshold learning is proposed. Then, the model is adjusted to examine effects of conditional feedback on learning and decision making. Then, the model is used to replicate some empirical findings. The results suggest conditional feedback can be a barrier to learning. Further, this study warns about problems of the current assumption of full feedback condition in most dynamic decision-making studies.
-
- Type:
- Document
- Date Created:
- 2008 July 20-2008 July 24
- Collection:
- System Dynamic Society Records
- Collecting Area:
- University Archives
- Collection ID:
- ua435
- Parent Record(s):
- 23d738ba88f8333bc39725f9cb5bd0b8, ce498623f0349395d0a141a0525190a0, and 6cbae5a21467df4434abbc87da443217
- Description:
- This article examines the impact of environmental legislation on sustainability that manifests through the conservation of natural resources and landfills. The developed model is implemented to a real world closed-loop supply chain with recycling and Design for Environment activities of electrical and electronic equipment in Greece. The motivation behind this research is twofold: first, to examine whether the environmental legislation should be considered as an endemic process of the system under study or introduced externally without taking into consideration the rates of the natural resources usage and the used products disposal and second, to examine the efficiency of different types of environmental legislation on sustainability in order to direct the policy at the right mix of regulatory measures. We adopt System Dynamics methodology applied to many environmental systems. Numerical analysis illustrates that the consideration of the endemic process and the expansion of the environmental regulations in order to include also measures for the products recyclability and recycled content improves significantly the efficiency of the environmental legislation on sustainability.