Meta-Modelle sind Rechenmodelle, die das Verhalten technischer Systeme näherungsweise beschreiben oder nachbilden. Sie werden aus Beobachtungen von Simulationsmodellen der technischen Systeme abgeleitet. Es handelt sich also um Modelle von Modellen, um Meta-Modelle. Meta-Modelle unterscheiden sich grundsätzlich von analytischen Ansätzen zur Systembeschreibung. Während analytische Ansätze in ihrer mathematischen Struktur die tatsächlichen Gegebenheiten des betrachteten Systems wiedergeben, sind Meta-Modelle stets Näherungen. Der Vorteil von Meta-Modellen liegt in ihrer einfachen Form. Sie sind leicht zu bilden und anzuwenden. Ihr Nachteil ist die nur annähernde und u.U. unvollständige Beschreibung des Systemverhaltens. Im folgenden wird die Bildung von Meta-Modellen anhand eines Bediensystems dargestellt. Zuerst werden die Möglichkeiten einer analytischen Beschreibung bewertet. Danach werden zwei unterschiedliche Meta-Modelle, Polynome und neuronale Netze, vorgestellt. Möglichkeiten und Grenzen dieser Formen der Darstellung des Systemverhaltens werden diskutiert. Abschließend werden praktische Einsatzfelder von Meta-Modellen in der Materialflußplanung und -simulation aufgezeigt.

This thesis entitled "The Study of Logistics Concept in the Organization with Associated Production" focuses on ensuring smooth material flows using information flows with respect to orders. It consists of the theoretical part, which describes basic concepts of solving logistical explaining the analyzed problems. The practical part is an application of analyses to the specific company VSP Group, a.s., with a special aim to the metal center. Results serve as a basis for the elaboration of proposals, and more effective use of information flows for a control of material flows.

The thesis is focused on application of logistics in the company, BAEST, a.s. It consists of theoretic part, introduction of the company and description of the process of the product producing. Application part of the thesis is closely focused on two fields. The first one is system of evaluation and selection of suppliers containing the design of new system in this field. The second one is addressed to analysis of material flow connected with production of tanks with the goal of optimization of the flow.

This master thesis is focussed on optimalization of material flow in an automotive company. First part introduce theoretical background. Automotive industry and its actual trends on global markets. Follows short introduction of the company where project of this thesis was executed. Main theoretical part describes concept of lean management, its tools in practical examples, but it is also focussed on philosophical approach to the work and mindset of the company. Follows the aplication part based on theoretical background. The whole project of this master thesis is focussed on specific area called PC store. At first this area is showed in context of overall material flow. Shortly there are introduced processes and areas where full material packaging flows. Follows deeper analysis and optimalization of PC store itself. There are three approaches of stock and lead time reduction applied. Last part shows the comparison of initial and future state including performed changes.

A new model of the material flow in rotary friction welding of tubes is proposed. The material flow proposed is based on 3D scans of welds performed with tungsten tracers. The tracers indicate a bifurcation of flow into two deformation paths. A different analysis is performed on each path.The material in Path 1 interacts with the weld interface and exhibits large amounts of azimuthal flow. Previous analytical investigations that have analytically modelled the weld interface as a non-Newtonian fluid are used to calculate the strain rate in this zone.The material in Path 2 transitions from axial to primarily radial flow. The assumption of no azimuthal flow in Path 2 is validated through experimental results of the tracer study. The directional transition in this path is compared to orthogonal machining and equal channel angular pressing. The process to estimate the variables needed to calculate strain and strain rates using the equations from orthogonal machining and equal channel angular pressing is defined. Strain and strain rate in Path 2 are dependent upon feedrate and upset. Both decrease throughout the welding process. The strain rate is higher than previous studies in rotary friction welding because of the deformation model proposed.

Byggbranschen kämpar med att kontinuerligt pressa byggtider och kostnader för ett alltsnabbare och effektivare byggprojekt för kunds räkning. Materialkostnaden utgör mellan 50–70 procent av det totala projektet. Därav är det högst relevant att se över tillvägagångssätt föratt minimera materialspill genom materialplanering och materialhantering, för att minskakostnader, eliminera icke värdeskapande produktionsprocesser och samtidigt värna om miljön. Detta kan göras genom bland annat metoder Lean construction, Just in time ochMaterialmanagement. Studien är baserad på semistrukturerade intervjuer med två företag som är verksamma i byggbranschen men som skiljer sig från varandra. Det ena företaget är ett byggföretag och det andra är ett konsultföretag som hjälper byggföretag med bland annateffektiviseringar av olika slag. Intervjuerna från båda företagen ligger fokusen på materialflödes process från planering och beställning till användning av material. Det framgåräven utmaningar angående materialplanering och materialhantering inom byggprojekt. Viktenav kommunikation för att effektivisera planering och hantering av material är stor för att kunnareducera materialspill samt icke värdeökande processer. För att underlätta kommunikationenkan digitala system och verktyg såsom RFID-taggar för leveransspårning användas. Det kanresultera i ökad produktivitet och minska den totala projektkostnaden. / The construction industry is under constant pressure for efficiency. Building times are expected to be faster and simultaneously more cost-efficient to meet the customer’s requirements. Material-costs range between 50-70 percent of the total construction project expenses. In order to suppress these costs, it is essential to minimize material waste through planning and material management, this can be done by eliminating non-value-based production processes which result in safeguarding the environment and reducing the material-costs. The main theories used in this thesis are therefore: Lean construction, Just in time and Material-management. The study is based on semi-constructed interviews with two construction businesses, one company is active within construction, and the other is a consultant firm who is active in coaching, costefficiency and material management. The interviews focus on the process of material-flow, starting from planning to purchasing and ultimately applying the material. The interviews highlight the challenges of material planning and material management within construction projects, but also, the importance of communication to gain maximum planning effectiveness and managing the material in order to reduce material-waste and non-value-based production processes. Digital systems are used to amplify communication and tools such as RFID-tags are used to track supply deliveries. This could potentially result in increased productivity and a reduction of the total project costs.

This diploma thesis deals with packaging materials in company Frauenthal Automotive Hustopeče, s. r. o., specifically proposals to improve the storage, flow and use of packaging material with limited storage capacity. The first part contains the theoretical basis of the work. The second part includes a presentation of the company and an analysis of the current situation. In the last part, own solutions to current shortcomings in the company are proposed.

The diploma thesis on the topic "Creating a Logistics Concept in a Selected Company" analyzes the logistics system of the company in terms of material and information flows in the production. The theoretical part explains the individual concepts of logistics. The analysis of the current situation of a selected company describes the current order processing, activities that affect order processing and how these activities contribute to the order realization. There are solution proposals in the field of information and material flows as a part of this thesis. These proposals contribute to streamline the course of the order management by the company.

The thesis is focused on the implementation of kanban system in the company Daikin Device Czech Republic s.r.o. The theoretical part describes the principles of logistics, lean production and inventory management, including their basic tools and methods. In the practical part of the thesis, Daikin Device Czech Republic Ltd. is introduced, where the analysis of the current state of supply logistics in the production hall is performed. Based on the analysis is designed kanban system including the way of its implementation. Furthermore, the risks of kanban system implementation are analyzed. Finally, the economic and uneconomic benefits of the kanban system for the company are evaluated.

This diploma thesis deals with the issue of material flow and lean manufacturing in a given section of a selected manufacturing company. The diploma thesis focuses on the weaknesses of the current state of the selected workplace and defines the areas for improvement. The first part presents the theoretical basis of the work. The second part of the work is focused on analyzing the current state of the workplace. There are provided solutions for better material flow and to implement selected elements of lean manufacturing in the last part.