Showing 13 results for Dynamics
Dr. Yahia Zare Mehrjerdi, Mohammad Dehghani Saryazdi,
Volume 25, Issue 4 (10-2014)
Abstract
Abstract:
In order to evaluate the relationship between Organizational Strategies and Organizational results, a comprehensive model is required, which should be able to capture all aspects of business excellence. The EFQM model is suitable tool to observe these factors. The EFQM model consists of two main domains: Enablers and Results. The first domain which includes processes and systems in general, "enable" the organization to have higher performance or "results". On the other hand, the feedback from the results makes the organization to correct the system. Hence, a dynamic model could be appropriate in analyzing the interrelated behavior of the two main domains as well as those within the criteria and sub-criteria. This research is an effort to find the relationship between Strategies and results through system dynamics tool based upon EFQM model. In other words, this research exploits system dynamics in order to measure the effects of Strategies on Organizational results using a dynamic model. The advantage is that by changing one parameter in the Strategies, one can find how it could affect key results especially financial outcomes.
Keywords: Organizational Strategies, Organizational results, Business Excellence Model, EFQM, System Dynamics
Eng Mehdi Pourhossein, Dr. Nasim Nahavandi, Dr. M. Kazem Sheikh-El-Eslami,
Volume 25, Issue 4 (10-2014)
Abstract
Because of electricity subsidies, electricity price in Iran is much lower than its real value, and the growth of electricity demand is much more than its rational rate, which in turn implies ever increasing investment in the electricity section by the Government. Therefore, the recent Government policies are based on elimination of electricity subsidies, followed by commissioning complete electricity market to attract investors in the power industry. In this paper, a model is developed for electricity demand prediction and evaluating Iran's current electricity market and complete market to deal with optimistic and pessimistic electricity demand. Hence, a system dynamics framework is applied to model and generate scenarios because of its physical capability and information flows that allow understanding the of behavior nonlinear dynamics in uncertain conditions. To validate the model, it was compared with the available actual data within 21 years, since (1988-2008). After model validation, two scenarios are evaluated based on the influence of eliminating electricity subsidies on electricity demand in short-term and long-term and then commissioning of the probable complete electricity market is evaluated. For this purpose, first, the electricity demand is estimated for the target years and then changing dynamics in transition of Iran’s electricity market is analyzed.
Yahia Zare Mehrjerdi, Mehrdad Alipoor,
Volume 27, Issue 4 (12-2016)
Abstract
Abstract Firms no longer compete as autonomous entities and prefer to joinin a supply chain alliance to take advantage of highly competitive business situation. Supply chain coordination has a greatimpact on Firm’sstrategic partnering and success in competitive business environment. In this paper, we propose a system dynamics simulation model for strategic partner selection in supply chain. Our model addresses a supply chain including suppliers and retailers. It presents an approach to simulateeach supplier’s (retailers) tendency to select downstream (upstream) partner selection and the impact of their policies in the whole supply chain.
Olasunkanmi Akinyemi, Kazeen Adebiyi,
Volume 30, Issue 4 (12-2019)
Abstract
Safety has been established to maintaining and improving the productivity level of aviation industry with derivable benefits in terms of wealth and reputation. Despite, the investment in aviation; safety is generally recognized as an incurred cost, leading to compliance approach. This may be due to dearth of literature on generally agreed proactive safety performance indicator to justify the huge investment. This study therefore developed predictive models that evaluate runway safety investment strategies and predict the overall performance of the aviation system using System Dynamics stock and flow diagram. An interactive computer programme of the models was written using Java programming language. The set of dynamic equations for predicting number of runway accidents, preventions, monetary savings/losses and safety programme breakeven period were the safety performance measures. Runway safety intervention effectiveness factor and level of budget implementation were system policy parameters used to control the mechanism of the runway safety system. Relevant data were obtained from Federal Aviation Authority, Nigeria to validate the models. Twenty-nine runway safety quantities were identified. The dynamic equations for number of runway accident preventions and monetary savings/losses exhibited exponential growth while number of runway accidents, exhibit exponential decay. The results of the simulation runs showed no significant difference with real life situations; thus the models can serve as useful tools to effectively and efficiently manage the behaviour and performance of runway safety programme.
Vitalina Babenko, Olena Rayevnyeva, Dmytro Zherlitsyn, Olena Dovgal, Goncharenko Natalia, Miroshnichenko Tetyana,
Volume 31, Issue 4 (11-2020)
Abstract
The processes of transformation of the energy space, namely the impact of alternative energy resources on it, are characterized by changes in the national economy in general and in the energy market in particular. The results of the analysis confirmed the significant dependence of electricity production indicators on renewable sources and such factors as GDP, CO2 emissions, total electricity production, which requires improvement of organizational and economic bases for policy development of state support for renewable energy technologies in countries with exogenous factors. The interdependence between electricity production from renewable sources and economic indicators in Ukrainian-Chilean relations using macroeconomic multifactor analysis based on the correlation method allowed to identify the most influential factors.
