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.

The diploma thesis is focused on the logistics concept in a selected company, which deals with the production of air conditioners. The theoretical part clarifies the basic concepts and issues related to logistics, material flows, warehousing, and inventory. The practical part introduces the company, performer individual analyzes and created research. Based on this analytical part, proposals are derived for optimization and changes in the logistics area, which will help improve the management of distribution, but also warehousing in a selected manufacturing company.

Main focus of this diploma thesis is the analysis and subsequent modification of production flow at a company, which is one of the world’s leading providers of industrial needles, precision parts and fine tools. Practical part of this thesis is devoted to the current flow of values and consequently describes its individual modifications. In this part the production areas are mapped, and the material handling system is described. This part also suggests a possible layout modification at the production site and simulation of proposed changes in Plant Simulation software from Siemens PLM Software. At the end of the work there are changes described that relate mainly to the philosophy 5S, kanban system or ergonomics of the workplace.

This diplom´s thesis is focused on areas of logistics and invetory management in manufacturing company, which are both important parts of business. The object of this thesis is analysis of activities which are connected with material flow. Theoretical part describes basics of logistics and material flow. Practical part deals with methods, which could help the company optimize costs for material elements and make the relationships between suppliers and customers more effective.

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 study examines the subsurface infrastructure in the Swedish city of Norrköping from an urban mining perspective. Urban mining is a broadly defined term for different strategies that regard the built environment as a resource base for materials. In this study, the focus is on three base metals that exist in large quantities in infrastructure parts: iron, copper and aluminium. A special focus is given to the parts of Norrköping’s infrastructure that are not in-use and thus constitute a ”hibernating stock” that contains recyclable metals. The main results of this study are twofold. First, a quantitative assessment of the hibernating stocks of urban infrastructure gives answers to how large the stocks are and where in Norrköping they are located. This was performed using a spatially informed Material Flow Analysis to arrive at a recycling potential in terms of weight and spatial concentration. Second, a qualitative assessment was made regarding how these hibernating stocks of urban infrastructure come into existence. An infrastructure studies perspective was used to outline three patterns with their own sets of ”hibernation” logics. These logics give rise to different prerequisites for the implementation of urban mining in practice. A main argument of this study’s cover essay is that both of the above outlined kinds of knowledge are needed to engage in urban mining with confidence. Thus, the main focus of the cover essay text is to describe how the two different perspectives of Material Flow Analysis and infrastructure studies were combined into a coherent research approach.

Today’s society is increasingly moving towards a digitalized world where society is becoming more connected. In terms of industries, it´s extra important to keep up with this trend to be competitive, but also to be more effective. This work will be done in collaboration with the company Attindas. Attindas is a manufacturer of absorbent incontinence aids and delivers products worldwide. The purpose of this work is to investigate two different material flows at Attindas. These flows are raw materials in the warehouse and waste from production to recycling rooms. A deeper analysis is made of the different flows to investigate which parts can be automated and how to do this. The goal of this work is to develop a solution that can replace today’s manual material handling. The problem statements this work is based on is: • Which material flow of waste and raw material are the most valuable to automate? • How can the chosen material flow be automated? The work is carried out with a Design Thinking method that goes through the following steps. Find users’ needs, define needs and problems, come up with ideas and test the solution. The work is supported by a literature study that examines what has already been done and what is already on the market. The result of this work was that Attinda’s waste management is the material flow that should be automated if financial gain and efficiency are to be achieved. The solution that was constructed is an external lifting device that will be mounted on a platform AGV (Automated Guided Vehicle). Two AGVs will drive in the factory and pick up four waste wagons at a time. This is to cope with the waste flow that comes from the production lines. The conclusion of the work is that waste management is a step that Attindas can automate to go to a more automated factory and get one step closer to Industry 4.0. With the help of the new solution, which is a lifting device adapted to the waste bins. Attindas can replace manual work and automate the flow of waste from production to recycling room. By implementing this solution in the factory, Attindas will over time make a financial gain comparable to the current solution, while maintaining its efficiency. / Dagens samhälle går allt mer mot en digitaliserad värld där samhället blir mer uppkopplat. Vad gäller industrier är det extra viktigt att hänga med i denna trenden för att vara konkurrenskraftiga, men även för att effektivisera verksamheten. Detta arbete kommer att göras i samarbete med företaget Attindas. Attindas är en tillverkare av absorberande inkontinenshjälpmedel och de levererar produkter över hela världen. Problemformuleringen som arbetet utgår ifrån är: • Vilket materialflöde av avfall och råmaterial är det mest värdefulla att automatisera? • Hur kan det valda materialflödet automatiseras? Syftet med detta arbete är att undersöka två olika materialflöden hos Attindas. Dessa flöden är råmaterial i lagret och spill från produktion till återvinningsrum. En djupare analys görs på de olika flödena för att undersöka vilka delar som går att automatisera samt hur man kan göra detta. Målet med detta arbete är att ta fram en lösning som kan ersätta dagens manuella materialhantering. Arbetet genomförs med en Design Thinking metod som genomgår följande fem steg. Hitta användarens behov, definiera behov och problem, komma upp med ideer, ta fram ideerna och testa lösningen. Arbetet styrks upp av en litteraturstudie som undersöker vad som redan har gjorts och vad som redan finns på marknaden. Resultatet av detta arbete blev att Attindas spillhantering är det materialflöde som borde automatiseras ifall ekonomisk vinning och effektivitet vill uppnås. Lösningen som konstruerades är en extern lyftanordning som ska monteras på en plattform AGV. Två stycken AGV ska köra i fabriken och hämta upp fyra spillvagnar åt gången. Detta för att klara av det flöde av spill som kommer från produktions linjerna. Slutsatsen av arbete är att spillhantering är ett steg som Attindas kan automatisera för att gå till en mer automatiserad fabrik och komma ett steg närmre Industri 4.0. Med hjälp av den framtagna lösningen som är en lyftanordning anpassad för de spillvagnar som finns i fabriken kan Attindas ersätta manuellt arbete och automatisera flödet av spill från produktion till återvinningsrum. Genom att implementeradenna lösningen i fabriken kommer Attindas både göra en ekonomisk vinning jämfört med dagens lösning, samtidigt som arbetet bibehåller sin effektivitet.

Life cycle analysis is an appropriate way to clear obscure facts about an element. Gallium is a critical element which is used in many technologies these days and therefore quantification of main global cycles of gallium, production, consumption and end of life products, also investigation about recycled gallium content and potential recycling possibilities are investigated in this paper. First a qualitative substance flow for gallium is designed similar to other metal cycles with regards to exclusive characteristics of gallium flows itself. USGS and World Mining Data are mainly used to get information about gallium production, main gallium consumptions and end of life products. Subsequently a quantitative model in STAN should unlock many uncertainties. Substance flow analysis and material flow analysis give a better understanding of unknown gallium flows with their uncertainties and meanwhile major applications, concentration of gallium in different products, waste flows, landfills and present recycling technologies are detailed. Consequently STAN model asserts that main gallium flows are primary gallium production and refined gallium production in production process, Integrated Circuit board fabrication, Light Emitting Diodes, Photovoltaic and recycled new scrap flow in manufacturing process. A significant amount of gallium is collected as stock in consumption process. Also current gallium recycling facilities are limited as recycling is not economically justified. Moreover main part of recycled gallium content is collected from new scrap which is formed through manufacturing process. Finally gallium consumption in Photovoltaic and Light Emitting Diodes industry increases rapidly and sustainability demand cost efficient methods for gallium recycling from solar cells, diodes and other end of life products.

京都大学 / 0048 / 新制・課程博士 / 博士(地球環境学) / 甲第19159号 / 地環博第134号 / 新制||地環||27(附属図書館) / 32110 / 京都大学大学院地球環境学舎環境マネジメント専攻 / (主査)教授 藤井 滋穂, 准教授 田中 周平, 准教授 西前 出 / 学位規則第4条第1項該当 / Doctor of Global Environmental Studies / Kyoto University / DFAM

Upcycling is the process of repurposing discarded materials into new products of higher value, and holds significant potential for sustainable waste management. This thesis explores the challenges and opportunities involved in expanding upcycling practices in the city of Stockholm, with a specific focus on craft classes in public schools. The goal of the study is to identify key success factors and propose strategies for scaling up upcycling initiatives. A mixed method approach, including literature review, semi-structured stakeholder interviews, attitude surveys, and material flow analysis, was employed to gather insights and data. The findings reveal various challenges within the upcycling value chain, such as the need for efficient collecting processes, limited storage space, and financial feasibility. Despite the sechallenges, the research identifies several success factors, including cost-effectiveness, regulatory support, and the availability of discarded materials. Overall, this research contributes to the understanding of upcycling practices in public schools’ craft class and provides valuable insights for policymakers, educators, and practitioners seeking to implement and expand sustainable waste management strategies. By addressing the identified challenges and leveraging the opportunities, upcycling practices can be effectively integrated into public school curricula, fostering environmental consciousness and promoting a circular economy mindset among students. / Upcycling är förädlingsprocessen att återanvända avfall för att skapa mer värdefulla produkter. Det har en betydande potential för hållbar avfallshantering. Detta examensarbete undersöker svårigheterna och möjligheterna med att bredda metoderna för upcycling i Stockholms stad, med särskild uppmärksamhet på hantverkskurser som erbjuds av offentliga skolor. Målet med studien är att identifiera avgörande faktorer för framgång och ge förslag på metoder för att öka storleken på ett upcycling-projekt. För att inhämta information och data användes en blandning av tekniker, som inkluderade litteraturgenomgångar, semistrukturerade intervjuer av intressenter, attitydundersökningar och materialflödesanalyser. Resultatet visar på flera utmaningar inom värdekedjan för upcycling, inklusive krävande insamlingsprocedurer, begränsat lagringsutrymme samt villkoren för ekonomisk genomförbarhet. Trots dessa brister och utmaningar avslöjar denna studie även flera framgångsfaktorer. Dessa inkluderar kostnadseffektivitet, kommunalt stöd samt tillgången till avfall. Sammantaget bidrar denna studie till förståelsen av återanvändningsmetoder i offentliga skolorshantverkskurser och ger värdefulla insikter för beslutsfattare, utbildare samt andra praktiserande som vill implementera och utöka strategier för hållbar avfallshantering. Genom att ta itu med de påvisade utmaningarna och utnyttja möjligheterna kan praxis för upcycling effektivt integreras i den offentliga skolans läroplaner, öka miljömedvetenheten och slutligen främja ett tankesätt för cirkulärekonomi bland skoleleverna.