Budgeted personalized incentive approaches for smoothing congestion in resource networks

Abstract. Congestion occurs when there is competition for resources by selfish agents. In this paper, we are concerned with smoothing out congestion in a network of resources by using personalized well-timed incentives that are subject to budget constraints. To that end, we provide: (i) a mathematical formulation that computes equilibrium for the resource sharing congestion game with incentives and budget constraints; (ii) an integrated approach that scales to larger problems by exploiting the factored network structure and approximating the attained equilibrium; (iii) an iterative best response algorithm for solving the unconstrained version (no budget) of the resource sharing congestion game; and (iv) theoretical and empirical results (on an illustrative theme park problem) that demonstrate the usefulness of our approach.

Application of Lean Construction Principles to Highway Projects: Analysis of Barriers to Timely Delivery of Service

Highway project delivery of new and reconstructed facilities in the United States is viewed to consume too much time, thereby denying the traveling public of urgently needed infrastructure. The purpose of this thesis is to gain a better understanding of current highway project delivery and suggest interventions intended to enhance time performance. The major research focus is the Highway Project Performance (HPP) Study. The HPP study examined empirical data collected from 65 projects completed by 10 public highway agencies in the Northeast and Mid-Atlantic regions of the United States. Research included determining frequency and magnitude of duration escalation and identifying the input variables of process, practices, conditions, and constraints under which typical highway projects are delivered. Non-parametric procedures were used to test for differences among participating highway agencies. The Kruskal-Wallis and Mann-Whitney tests were employed to evaluate differences in mean TPI values for late and on time project subsets. Chi-square tests were conducted to analyze the difference in observations between the combined multi-dimensioned categories. Odds Ratio (OR) and relative risk or the risk ratio (RR) values were computed for the various categories including process and practices. Logistic regression was applied to the constraints as an additional test procedure. Semantic response differentials for each of the key performance indicators were also evaluated. The HPP Study findings showed that approximately 66% of highway projects finish beyond the original contract duration with a mean Time Performance Index (TPI) of 0.859. Projects exposed to phased maintenance of traffic (MOT), utilities, streams or waterways, and railroads exhibit the greatest relative risk for duration escalation. Primary arterials, projects that combine bridge and roadwork, and those located in urban environments also exhibit greater relative risk of duration escalation. The relative risk of duration escalation increases exponentially with increase of project cost. Late and On Time project subsets exhibit differences in mean semantic differentials (MSD values) in constructability, the degree to which contract documents address constraints, quality and effectiveness of the contractor's schedule, and trust between the contractor and owner. These findings provide focus and motivation for owners to reduce the risk of duration escalation.Ph.D., Civil Engineering -- Drexel University, 201

A critical analysis of the relationship between business information system technology and supply chain management with special reference to optimum efficiency within large enterprises in the food and drug retail sector in KwaZulu-Natal.

Masters Degree. University of KwaZulu-Natal, Pietermaritzburg.The purpose of this research is to explore the relationship between supply chain management and business information system technology within the food and drug retail sector with special reference to optimum efficiency. Business information system technology leverages information and knowledge sharing throughout the supply chain which enables them to respond more effectively to an ever-changing and volatile marketplace. The relationship between supply chain management and business information system technology is multi-faceted and complex in nature, and consequently, has the ability to penetrate every element of an organisation’s functionality. Furthermore, it has the ability to penetrate the functionality of an entire chain or network of suppliers and markets irrespective of their position around the globe. Supply Chain management literature teaches that optimisation within functional areas is not as effective as cross-optimisation across functions and supply chain networks. As supply chains rely on business information technology for crossoptimisation, optimum efficiency will always be a moving target for as long as business technology and supply chain management continue to break through new ground. In this research large food and drug supply chain networks and their business information system requirements, trends, influence, effect and constraints were reviewed, with special reference to creating optimum efficiency in their supply chain networks. This research was motivated by discussions with Pick ‘n Pay’s business information system’s service provider and their desire to optimise Pick ‘n Pay’s supply chain network efficiency in a highly price-competitive environment, resulting in an in-depth case study being carried out on Pick ‘n Pay (Pty) Ltd stores in KwaZulu-Natal. The review of literature suggests that cross-optimisation is only mutually beneficial within trust relationships that exhibit seamless flows of information throughout a supply chain. Data suggests that despite Pick ‘n Pay’s use of advanced business information system technology, Pick ‘n Pay together with the food and drug retail stores in South Africa have a long way to go on this issue

Introduction to Development Engineering

This open access textbook introduces the emerging field of Development Engineering and its constituent theories, methods, and applications. It is both a teaching text for students and a resource for researchers and practitioners engaged in the design and scaling of technologies for low-resource communities. The scope is broad, ranging from the development of mobile applications for low-literacy users to hardware and software solutions for providing electricity and water in remote settings. It is also highly interdisciplinary, drawing on methods and theory from the social sciences as well as engineering and the natural sciences. The opening section reviews the history of “technology-for-development” research, and presents a framework that formalizes this body of work and begins its transformation into an academic discipline. It identifies common challenges in development and explains the book’s iterative approach of “innovation, implementation, evaluation, adaptation.” Each of the next six thematic sections focuses on a different sector: energy and environment; market performance; education and labor; water, sanitation and health; digital governance; and connectivity. These thematic sections contain case studies from landmark research that directly integrates engineering innovation with technically rigorous methods from the social sciences. Each case study describes the design, evaluation, and/or scaling of a technology in the field and follows a single form, with common elements and discussion questions, to create continuity and pedagogical consistency. Together, they highlight successful solutions to development challenges, while also analyzing the rarely discussed failures. The book concludes by reiterating the core principles of development engineering illustrated in the case studies, highlighting common challenges that engineers and scientists will face in designing technology interventions that sustainably accelerate economic development. Development Engineering provides, for the first time, a coherent intellectual framework for attacking the challenges of poverty and global climate change through the design of better technologies. It offers the rigorous discipline needed to channel the energy of a new generation of scientists and engineers toward advancing social justice and improved living conditions in low-resource communities around the world

Rethinking the risk matrix

So far risk has been mostly defined as the expected value of a loss, mathematically PL (being P the probability of an adverse event and L the loss incurred as a consequence of the adverse event). The so called risk matrix follows from such definition. This definition of risk is justified in a long term “managerial” perspective, in which it is conceivable to distribute the effects of an adverse event on a large number of subjects or a large number of recurrences. In other words, this definition is mostly justified on frequentist terms. Moreover, according to this definition, in two extreme situations (high-probability/low-consequence and low-probability/high-consequence), the estimated risk is low. This logic is against the principles of sustainability and continuous improvement, which should impose instead both a continuous search for lower probabilities of adverse events (higher and higher reliability) and a continuous search for lower impact of adverse events (in accordance with the fail-safe principle). In this work a different definition of risk is proposed, which stems from the idea of safeguard: (1Risk)=(1P)(1L). According to this definition, the risk levels can be considered low only when both the probability of the adverse event and the loss are small. Such perspective, in which the calculation of safeguard is privileged to the calculation of risk, would possibly avoid exposing the Society to catastrophic consequences, sometimes due to wrong or oversimplified use of probabilistic models. Therefore, it can be seen as the citizen’s perspective to the definition of risk

Management: A continuing literature survey with indexes

This bibliography lists 782 reports, articles, and other documents introduced into the NASA scientific and technical information system in 1977. The citations, and abstracts when available, are reproduced exactly as they appeared originally in IAA and STAR, including the original accession numbers from the respective announcement journals. Topics cover the management of research and development contracts, production, logistics, personnel, safety, reliability and quality control citations. Includes references on: program, project and systems management; management policy, philosophy, tools, and techniques; decisionmaking processes for managers; technology assessment; management of urban problems; and information for managers on Federal resources, expenditures, financing, and budgeting