Search results for "System dynamics"

Wavelet-Based Optimal Control of a Wind Turbine System: A Computational Approach

2011

This paper deals with a computational optimization approach to the problem of state-feedback control design for a wind turbine system. The first step of the study is to develop a reduced order model for the system by considering the most important physical phenomena of aerodynamics and structural dynamics. Moreover, the behavior of the system can be influenced by the coupled dynamics between the tower motions and the blade pitch and turbine speed which can cause instabilities in the control loops in the worst case. By using a suitable wavelet funcation, called Haar functions, a recursive computational procedure is established for finding the system dynamics approximately by solving only alg…

Social Media Marketing and Value Co-Creation

2017

Nowadays social media and brand communities provide virtual places where the consumers can publicize their opinions about products and services and play an active role as marketers, advertisers, value creators through electronic word-of-mouth. Since most of the times these dynamics flow out of business control, in order to pursue firms' objectives, managers and marketers operating in many sectors look at the web social community with growing interest. The present chapter presents a system-wide analysis of the links and feedback mechanisms between the different aspects of value co-creation through social media marketing and brand communities. For the purpose, it is proposed a qualitative mod…

Politiche incentivanti, Motivazione delle Risorse Umane e Performance nell’Azienda Pubblica: un approccio di System Dynamics.

2009

Transition to sustainability: Italian scenarios towards a low-carbon economy

2014

This paper analyzes different policies that may promote the transition to sustainability, with a particular focus on the energy sector. We present a dynamic simulation model where three different strategies for sustainability are identified: reduction in GHG emissions, improvements in energy efficiency and the development of the renewable energy sector. Our aim is to evaluate the dynamics that those strategies may produce in the economy, looking at different performance indicators: rate of growth, unemployment, fiscal position, GHG emission, and transition to renewable energy sources. © Springer-Verlag Berlin Heidelberg 2014.

Strategic Resources and Reestablishing Presence in the German Olive Oil Markets: A DPM Case Study

2014

The dynamics of technological substitution: the case of eco-innovation diffusion of surface cleaning products

2016

Some eco-innovations have already reached a mature state, but they diffuse slowly. There is little known about the importance of various factors on the diffusion process of eco-innovations. The aim of this research is to propose a conceptual model for eco-innovation diffusion, where particular case study of eco-innovation – micro-fibre cloth (MFC) for surface cleaning purposes – is given. The work will study the relative importance of various motivations on diffusion processes as well as the influence of information campaigns. This novel methodology has been developed under the system dynamics framework and is coupled with the logistic regression model. Structural validation tests were done…

Opportunities and pitfalls related to e-commerce strategies in small-medium firms: A system dynamics approach

2002

E-commerce is often perceived as a powerful lever to foster growth of SMEs. However, both the literature and empirical evidence have shown the perils hidden in superficial decision making by SME entrepreneurs. A system dynamics (SD) approach is used in this article to demonstrate how managing processes of accumulation and depletion of strategic assets, detecting inertial effects of decisions made in the past, and selectively acting on policy levers are likely to help entrepreneurs in understanding opportunities and pitfalls related to e-commerce strategies. A feedback analysis of three case studies selected from the literature and the main findings from a survey conducted by the authors on …

Dynamic Performance Management

2016

This book explores how to design and implement planning & control (P&C) systems that can help organizations to manage their growth and restructuring processes in a sustainability perspective. The book is not designed to enable the reader to become an experienced system dynamics modeler; rather, it aims to develop the reader’s capabilities to design and implement performance management systems by using a system dynamics approach. More specifically, the book shows how to develop system dynamics models that can better support an understanding of: -What is organizational performance and how to frame and measure it; -How to identify and map the processes underlying performance; -How to d…

Enhancing Joined-Up Government and Outcome-Based Performance Management through System Dynamics Modelling to Deal with Wicked Problems: the Case of S…

2015

The paper by Auping et al. (2015) focuses on the topic of societal 'ageing', that is, 'a population process, caused by declining fertility and mortality rates, which manifests itself in the growing number of older persons in society' (Huber, 2005). A broader definition frames societal ageing as a 'demographic, structural, cultural and economic transformation resultant from the increase in the number and proportion of " older " people within society' (Victor, 2005, p. 5). 'Double societal ageing' today characterizes most developed countries, which experience both an increase in the percentage of older people and in their life expectancy. In terms of public policy and finance, the relevance o…

Societal implications of sustainable energy action plans: from energy modelling to stakeholder learning

2019

This article investigates the potential impact of sustainable energy action plans (SEAPs) on local development through a two-step methodology involving participatory planning and quantitative analysis. The first phase relies on a participatory system mapping (PSM) approach and generates a causal structure at the basis of the urban model. In the second phase, we transform the qualitative map into a system dynamic model which evaluates the effect of the SEAP on social, economic and environmental indicators. This methodology was applied to the case of Cascina Municipality (Italy). Through scenario analysis, we show that some indirect feedback can harm the achievement of the 20% emission reduct…