Artykuły (CN-total)

Permanent URI for this collectionhttps://repo.agh.edu.pl/handle/AGH/102857

Artykuły czasopisma Total Logistic Management

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Access status: Open Access ,
A method for scheduling the goods receiving process in warehouse facilities
(AGH University of Science and Technology Press, 2008) Ambroziak, Tomasz; Lewczuk, Konrad
The paper discusses the role of goods receiving/shipping scheduling in the warehousing process design. A formal notation of schedules is proposed and implemented in a software application for a specific analytical example.
Access status: Open Access ,
A static model for selecting technical facilities of a logistics centre based on the tasks to be performed
(AGH University of Science and Technology Press, 2008) Jacyna, Marianna; Wiśniewski, Krystian
This paper discusses a method of optimisation of technical facilities of logistics systems. The presented approach is based on a static model of cargo flows distribution among the structural elements of the analysed system. The method has been verified using a real logistics centre as an example.
Access status: Open Access ,
Aggregate planning in manufacturing company - linear programming approach
(AGH University of Science and Technology Press, 2011) Hanczar, Paweł Stanisław; Jakubiak, Michał
The authors take into consideration the process of translating demand forecasts (or sale plans) into production plan. In the first part of the paper the characteristics and parameters of a aggregate planning are summarized. The main part contains the proposal of integer programming model which supports aggregate planning decisions. In the proposed model production quantities, timing of inputs, inventory levels and workloads are considered. The last part of the paper contains the presentation of computational result obtained by using the introduced model.
Access status: Open Access ,
An assesment of individual transport in the aspect of quality of life on the example of selected medium sized cities
(AGH University of Science and Technology Press, 2011) Kiba-Janiak, Maja; Cheba, Katarzyna
The main aim of the paper is to discuss the role of individual transport in city logistics in the aspect of quality of life.The article is based on an empirical study. It presents the results of quantitative research based on a questionnaire survey, which was conducted in three medium sized cities in Poland among 1600 citizens. The main goal of the research was to receive information about the correlation between city logistics and the quality of life. The article presents only a narrow part of the suvey research in the area of individual transport in terms of quality of life.
Access status: Open Access ,
Application of selected methods of graph theory and combinatorial heuristics to minimising the number of transits nodes in an air network
(AGH University of Science and Technology Press, 2008) Mażbic-Kulma, Barbara; Owsiński, Jan Wojciech; Sęp, Krzysztof
In the paper we present the notion of alpha-clique and some of its properties. Covering with alpha-cliques is a preprocessing method for an air network, described as a graph, in which vertices correspond to airports and edges correspond to air connections. Using the alpha-clique cover we obtain a hypergraph, in which we find the minimum transversal. The set of vertices thus obtained is the sought-for set of transits nodes, called hubs. Using the alpha-clique concept instead of proper cliques we can obtain the solution to the graph covering problem easier.
Access status: Open Access ,
Choice of order picking concepts by means of simulation tools
(AGH University of Science and Technology Press, 2010) Gałązka, Marek; Jakubiak, Michał
The pressure connected with cost cutting parallel to increase in consumer service quality, as well as speeding up the flow of goods are the result of worldwide economy trend connected with a big competition in the market. That's why in modern economy even small movements of goods on short distances are becoming more and more important. Order picking is the most laborious process in a warehouse, and according to different research, it equals to 55-65% of costs of all warehousing operations. On the basis of the existing model of a warehouse, which belongs to a logistic operator, a computer program has been created which examines the influence, of goods allocation in a warehouse and three heuristic concepts of planning the picking route, on the overall order picking time. By means of implemented simulation methods it is possible to match the appropriate order picking process to the needs of a given enterprise.
Access status: Open Access ,
Classification of distribution networks
(AGH University of Science and Technology Press, 2010) Straka, Martin; Malindžák, Dušan
Distribution networks are possible to create from the final number elements. Topology of distribution networks as one of strategic decision of the design logistics system is depending on the quantitative factors, business position on the market, type of products, volume of production, location business and warehouses, from status of firm activities, from the number and its capacity of the distribution resources and other.
Access status: Open Access ,
Company strategy in the crisis period
(AGH University of Science and Technology Press, 2010) Malindžák, Dušan; Mervart, Jaroslav
The article deals with the logistic strategies enabling an enterprise to create a strategy flexible in terms of business and marketing and stable in terms of manufacturing. In order to create a strategy model the following principles can be applied: shorter periods of capacity planning combined with flexible planning, SYNCRO - MRP principle, the application of forecasting in operative planning, creation with partners one of the cooperation form as supply chain, demand chain, lean supply chain, agile supply chain, leagile supply chain, and using the DBR, APS and SCP systems.
Access status: Open Access ,
Concept of production facilities layout in company Alumin, s.r.o. Slovakia
(AGH University of Science and Technology Press, 2011) Straka, Martin
The aim of part of the solution layout processing company is an analysis of the existing system of distribution of production equipment company, identification of material flows and showing the possibility of modifying the layout of production facilities in compliance with capacity, safety and quality requirements for production.
Access status: Open Access ,
Controlling of logistics projects
(AGH University of Science and Technology Press, 2011) Pisz, Iwona
A logistics project can be defined as a complex, special and unique sets of activities which can be described by technical and economic parameters and is determined by cost, time, and scope in order to aid logistics management in enterprise/supply chain. Controlling of the logistics project is process of measuring progress toward an objective, evaluating what remains to be done, and taking the necessary corrective tasks to achieve or exceed the objectives of the logistics project. This paper describes the idea of logistics projects. The controlling of logistics projects is discussed. In the paper tools dedecated for controlling of logistics projects are presented. The tools can be applied to the controlling process to support the management of logistics projects.
Access status: Open Access ,
Cross-sectoral comparison of the effect of sales planning practices on manufacturing strategy in supply chains
(AGH University of Science and Technology Press, 2011) Szozda, Natalia; Świerczek, Artur
The goal of the paper is to make a cross-industrial comparison of the effect of sales planning practices on different types of manufacturing strategies applied in 343 producing companies operating in European, Asian and African supply chains. In order to achieve an empirical aim a necessary methodology and statistical analyses have been employed. In the result of the analysis multiple regression models have been developed for specific manufacturing strategies in supply chains operating in different industries worldwide. It enabled to make cross-sectoral comparisons of the contribution to variance in manufacturing strategy.
Access status: Open Access ,
EU regulations and dynamics of changes in logistics system architecture in power engineering
(AGH University of Science and Technology Press, 2011) Brzóska, Jan; Pyka, Jan
The new EU energy policy is commonly associated with climate-energy package aiming at lowering emission and use of primary energy as well as increased share of renewable energy sources. In practice the accepted policy comprises a much more complex spectrum of issues and its realization requires a number of new legal regulations. Their application will result in diverse, often significant in scale and quality changes in functioning of the economy especially in the area of power engineering and environmental protection. One of the vital elements of power industry is its logistical system. The scope of the presented work was the dynamics of the changes in the architecture of the power engineering logistic system which results from applying the new regulations of new power engineering policy. New legal regulations were presented that were the most significant for functioning of the logistic system in power engineering. The logistic system architecture in Polish power engineering was characterized and analyzed. The most important tendencies of its changes were outlined as well as their economic and social consequences.
Access status: Open Access ,
Evolutionary approach for obtaining the hub and spoke structure in the logistic network
(AGH University of Science and Technology Press, 2011) Mażbic-Kulma, Barbara; Stańczak, Jarosław; Owsiński, Jan Wojciech; Sęp, Krzysztof
In order to describe transportation system, as a routine a connection graph would be used. Vertices of the graph can be train stations, bus stop, airports etc. The edges show direct connections between vertices. A direct application of such graph can be difficult and computational problems can occur while one would try to organize or optimize such a transportation system. Therefore, a method of aggregation of such graph was introduced, using the general kernel and shell structure and a hub and spoke transformation method of the source graph. These structures allow to concentrate and order the transport of goods/persons among vertices and enable to reduce the number of analyzed vertices as well as edges of the graph. In the presented paper we continue our work on kernel and shell and its instance hub and spoke methods of connection graph transformation. In this paper we develop model of the transportation system using the hub and spoke method with predetermined, minimum and indirectly described numbers of hub nodes. To obtain the desired structures, several versions of specialized evolutionary algorithm (EA) were developed and applied.
Access status: Open Access ,
Evolutionary approach to find kernel and shell structure of a connection graph
(AGH University of Science and Technology Press, 2009) Mażbic-Kulma, Barbara; Stańczak, Jarosław; Sęp, Krzysztof; Potrzebowski, Henryk
The theory of logistic transportation systems deals with models of phenomena connected with movement of goods and persons. The developed model of the transportation system is expected to simulate a real system, but also should help us to solve given transportation tasks. In order to describe transportation system (rail, bus or air), as a routine a connection graph would be used. Vertices of the graph can be train stations, bus stops etc.. The edges show direct connections between vertices. Its direct application can be difficult and computational problems can occur while one would try to organize or optimize such a transportation system. Therefore, a method of aggregation of such graph was introduced, using the general kernel and shell structure and its particular instances: hub-and-spoke and α-clique structured graphs of connections. These structures enable to concentrate and order the transport of goods/persons among vertices. To obtain these desired structures an evolutionary algorithm (EA) was applied. This method enables to reduce the number of analyzed vertices as well as arcs/edges of the graph.
Access status: Open Access ,
Finding structure kernel and shell with predetermined cardinality of kernel set, using evolutionary algorithm
(AGH University of Science and Technology Press, 2010) Mażbic-Kulma, Barbara; Stańczak, Jarosław; Sęp, Krzysztof
The theory of logistic transportation systems deals with models of phenomena connected with movement of goods and persons. The developed model of the transportation system is expected to simulate a real system, but also should help us to solve given transportation tasks. In order to describe transportation system (rail, bus or air), as a routine a connection graph would be used. Vertices of the graph can be train stations, bus stops etc. The edges show direct connections between vertices. Its direct application can be difficult and computational problems can occur while one would try to organize or optimize such a transportation system. Therefore, a method of aggregation of such graph was introduced, using the general kernel and shell structure and its particular instance the ?-clique structured graphs of connections. In the present approach, we use a predetermined number of communication hubs with the possibility of direct determining which nodes should become hubs or selecting them by the solving method. This structure allows to concentrate and order the transport of goods/persons among vertices and enables to reduce the number of analyzed vertices as well as arcs/edges of the graph. To obtain the desired structure, an evolutionary algorithm (EA) was applied.
Access status: Open Access ,
Influence of the demand planning process on logistic system reliability - case study
(AGH University of Science and Technology Press, 2011) Szozda, Natalia; Werbińska-Wojciechowska, Sylwia Ewa
Authors define the main elements affecting the right logistic system performance level and investigate the possible connections between demand process planning quality and logistic system reliability. Thus, the definitions of logistic system reliability are described. Later, an overview of some recent developments in the analyzed research area is provided. In the next point, authors present the main elements affecting the reliable and available logistic system performance. Finally, the paper is ended by the presentation of the obtained analysis results in comparison with the knowledge about the case companies' present condition.
Access status: Open Access ,
Integrated scheduling in a supply chain by mixed integer programming
(AGH University of Science and Technology Press, 2008) Sawik, Tadeusz
A mixed integer programming approach is proposed for a long-term, integrated scheduling of material manufacturing, material supply and product assembly in a customer driven supply chain. The supply chain consists of three distinct stages: manufacturer/ supplier of product-specific materials (parts), producer where finished products are assembled according to customer orders and a set of customers which generates final demand for the products. The overall problem is how to coordinate manufacturing and supply of parts and assembly of products so that the total supply chain inventory holding cost and the production line start-up and parts shipping costs are minimised. Numerical examples are presented and some computational results are reported.
Access status: Open Access ,
Inventory cost settings in small bucket lot-sizing and scheduling models
(AGH University of Science and Technology Press, 2009) Kaczmarczyk, Waldemar
This paper addresses models for lot-sizing and scheduling of several products on machines with limited capacity. Small time buckets in such models may arise from subdividing real (macro-)periods into several fictitious micro-periods. The inventory holding costs may then be accounted for either at the end of every micro-period or only at the end of the macro-period. Presented results of computational experiments show that these two settings lead to completely different models and solutions. After reviewing the definition of inventory holding costs, we propose a rule for correctly setting the unit costs which is essential for a correct formulation of the model.
Access status: Open Access ,
Logistic process reengineering : a case study
(AGH University of Science and Technology Press, 2010) Cempel, Witold Aleksander
The aim of this paper is to present the case study of business processes reengineering (BPR). Important part of the change was the logistic process. At the beginning, the literature review on process approach and BPR was presented. Next a BPR methodology was shown. The case study of the implemented BPR change consists of three parts. In the first part, the company’s standing before the change was characterised. Next, the methodology of the project, based on the BPR approach, was defined. In the third part, the results of the BPR change were depicted. The article ends up with general conclusions.
Access status: Open Access ,
Logistics costs in the waste disposal system on the example of a steel mill
(AGH University of Science and Technology Press, 2011) Zwolińska, Bożena; Michlowicz, Edward
An industrial waste management system is a set of processes enabling space-time transformations along with quantity and quality changes aiming at the reduction of negative influence of the industry on the ecosystem. One of the ways of controlling the destructive impact of waste on the environment is recycling. There is no type of residue that cannot be reutilized having suitable technologies and financial resources. An important part of a company's development strategy is the profit and expenditure account. This article presents the overall costs generated within the waste management system of a full production cycle steel mill. The costs have been grouped by objects according to the criteria of main logistics processes realized within the waste management system.