The parcel hub scheduling problem with limited conveyor capacity and controllable unloading speeds

We investigate a specific truck scheduling problem at cross-docks in the postal service industry on an operational level aiming to maximise the number of duly parcels assuming fixed departure times of the outbound trucks. The inbound gates and the conveyors as means of transportation inside the hub constitute the bottleneck resources. As a novel extension, we propose flexible unloading speeds to efficiently utilise the scarce resources. We formalise the problem with a mixed integer program and explicitly incorporate controllable unloading speeds of the inbound trucks. We determine the computational complexity and develop a genetic algorithm to efficiently solve the problem. Our investigation focuses on both the performance of the genetic algorithm and the applicability of the results in a real-world environment by implementing scheduling policies in a simulation model that considers individual parcel interactions. Based on our experimental results, we can state that especially in problem settings with scarce conveyor capacities, our approach to incorporate controllable unloading speeds has the potential of significantly increasing the number of duly parcels

Privatisation of Network Industries in Germany : A Disaggregated Approach

The purpose of this paper is to analyse the impact of market oriented institutional reforms in German network industries. A disaggregated approach is chosen, which differentiates between network services, infrastructure management and network infrastructure. The gradual opening of network service provision has already had a positive impact on the performance of all markets for network services. Nevertheless, harmonisation and integration of infrastructure management as well as an adequate regulation of access to the non-competitive infrastructures (monopolistic bottlenecks) is necessary in order to exploit the full benefits of liberalisation and privatisation of network service markets. --

Print media distribution: Process, profitability, and challenges

Today the distribution of printed media is viewed as a value added or ancillary service. Ancillary services have been identified as a key printing industry growth opportunity in a recent PIA/GATF report (Davis & Gleeson, 2005). Distribution is a customer service offering that starts when the job is scheduled. Efficient distribution involves the use of market expertise to negotiate freight rate and logistics services, routing, and overall compilation or management and organization of products and distribution. Other aspects of distribution include warehousing, shipping, inventory management, fulfillment and kit packing. The objectives for Phase Two of this research project were to: * highlight the importance of print media distribution as part of the print production process, * gain a clearer understanding of the costs and profitability of distribution for graphic communications companies, * develop a graphical model of select distribution applications, and * document solutions utilized to address key distribution challenges. Four printing companies that offer distribution services participated in this phase of the research study. The participants were asked ten questions about distribution workflow, challenges, profitability, and future trends within their companies as well within the printing industry as a whole

Small cities face greater impact from automation

The city has proven to be the most successful form of human agglomeration and provides wide employment opportunities for its dwellers. As advances in robotics and artificial intelligence revive concerns about the impact of automation on jobs, a question looms: How will automation affect employment in cities? Here, we provide a comparative picture of the impact of automation across U.S. urban areas. Small cities will undertake greater adjustments, such as worker displacement and job content substitutions. We demonstrate that large cities exhibit increased occupational and skill specialization due to increased abundance of managerial and technical professions. These occupations are not easily automatable, and, thus, reduce the potential impact of automation in large cities. Our results pass several robustness checks including potential errors in the estimation of occupational automation and sub-sampling of occupations. Our study provides the first empirical law connecting two societal forces: urban agglomeration and automation's impact on employment

Media Distribution in the Printing Industry: A Study of the Movement of Printed Materials and Electronic Files

Change, according to Phillip Ruggles (2005), can be advantageous to one\u27s business. It can sometimes be exciting and economically rewarding. At other times, change can be challenging and risky, bringing about chaos and disruption. The printing industry is undergoing both structural and cyclical change. Meeting the challenge to remain competitive in today\u27s printing industry relies heavily on providing value for customers. Thus, print service providers are offering a variety of value added services in an effort to meet customer demands and to remain competitive. One such additional service is distribution (both physical and electronic), which includes shipping/delivery, mailing, warehousing, and inventory management. As print technology advances, the offering of distribution services by print providers is becoming a trend in the industry. The objectives of this research were to understand distribution and distribution workflows, to understand the utilization of electronic distribution of files and the distribute-then-print model, and to understand how printers are incorporating e-commerce as a tool to distribute print. This thesis research also looked at the challenges, issues, and future trends anticipated by print service providers for their distribution operations. To achieve these objectives, selective answers from the 2005 Printing Industry Center (PIC) research on Media Distribution (Cummings & LeMaire) and another research on the Utilization ofE-commerce (Cummings & LeMaire) were used to support vi this thesis. Additionally, in-depth interviews were conducted with six print service providers to further understand distribution operations within the printing industry. The research results revealed key findings in the areas of physical distribution, distribution workflows, electronic distribution, e-commerce, and distribution challenges and trends. Questions addressing physical distribution and workflows yielded the following results: the definition of distribution from all the responses can be summarized as the movement of printed and finished materials from the printing plant to an internal storage location, to a distribution center, to the customer (the print buyer), or to the enduser. Various processes were described by research participants to represent their distribution operations. Figures 12 and 13 are representations of the two main workflows: a simple workflow for small companies, and a more complex workflow for larger companies. Electronic distribution findings showed that this model has not had a great impact upon the participants\u27 distribution procedures or their businesses in general. Only four (25%) of the companies interviewed have used this distribution model. Additionally, questions addressing e-commerce utilization showed that participants\u27 definition of ecommerce can be summarized as a system that allows customers to perform transactions over the Internet. Participants all agreed that e-commerce is a value-added service that benefits everybody. It was also apparent that most printers are not utilizing the full capabilities of e-commerce systems. Research participants discussed various challenges faced while offering distribution services. Among those challenges are storage and warehousing, customer information flow, fuel surcharges, postage increases, and trucking. Participants also vn anticipate the following trends relating to their distribution operations: advancement in technology, improved customer relations, and electronic flow of communication. This thesis research is valuable and contributes ample literature on the topic of distribution in the printing industry. As no research is exhaustive, opportunities remain for further research projects within various aspects of this study

09261 Abstracts Collection -- Models and Algorithms for Optimization in Logistics

From June 21 to June 26, 2009 the Dagstuhl Seminar Perspectives Workshop 09261 ``Models and Algorithms for Optimization in Logistics \u27\u27 was held in Schloss Dagstuhl~--~Leibniz Center for Informatics. During the seminar, several participants presented their current research, and ongoing work and open problems were discussed. Abstracts of the presentations given during the seminar as well as abstracts of seminar results and ideas are put together in this paper. The first section describes the seminar topics and goals in general. Links to extended abstracts or full papers are provided, if available

Technology assessment of future intercity passenger transportation systems. Volume 6: Impact assessment

Consequences that might occur if certain technological developments take place in intercity transportation are described. These consequences are broad ranging, and include economic, environmental, social, institutional, energy-related, and transportation service implications. The possible consequences are traced through direct (primary) impacts to indirect (secondary, tertiary, etc.) impacts. Chains of consequences are traced, reaching as far beyond the original transportation cause as is necessary to identify all impacts felt to be influenced significantly by the technological development considered

Have a nice day! The American journey to better working conditions

Employment (Economic theory) ; Unemployment

Bosnia and Herzegovina market research on the use of autonomous vehicles and drones in postal traffic

New technologies primarily affect the lives of all people, their habits, needs, desires, but also significantly affect the demands placed on various business sectors. Discussions on the increasingly rapid development of technical-technological solutions that can be applied in the postal sector and logistics have a long history. New technologies in all areas bring a constant change in the relationship between companies and their customers, which significantly affect the quality of work and activities. In the years to come, it will be an increasing challenge for postal operators around the world, as well as for other companies, to achieve substantive communication and understanding of their customers through the application of innovative technologies. Understanding and learning about customer issues is key to offering them services that, with their precise targeting of stakeholders, quality, visibility, efficiency, and, perhaps most importantly, flexibility, will be able to meet needs that change so quickly over time. This will be possible with new technologies and innovative solutions. The paper presents a market research on the potential use of autonomous vehicles and drones in the postal sector in Bosnia and Herzegovina. The research is based on a survey questionnaire on the use of drones and autonomous vehicles in the postal sector in the segment of shipment delivery