The society today lives on the philosophy of ‘take-make-use-dispose.’ In the long run, this is not sustainable as the natural resources and the waste carrying capacity of the earth are limited. Therefore, it is essential to reduce dependency on the natural resources by decoupling the growth from the consumption. In this venture, both the society and the manufacturing industry have a vital role to play. The society needs to shift towards Circular Economy that rests upon the philosophy of ‘take-make-use-reuse’ and the manufacturing industry has to be a major stakeholder in this shift. Despite being proven to be both economically and environmentally beneficial, successful examples of circular systems are few today. This is primarily due to two reasons; firstly, there is a lack of systemic and systematic approach to guide industries and secondly, there is a lack of analysis methods and tools that are capable of assessing different aspects of circular manufacturing systems. Taking on to these challenges, the objective of this research is to bring forward a framework with methods and decision support tools that are essential to implement circular manufacturing systems. The initial conceptual framework with the systemic approach is developed based on extensive review and analysis of research, which is further adapted for industrial implementation. Systematic analysis methods, decision support and implementation tools are developed to facilitate this adaptation. This development has been supported by four cases from diverse manufacturing sectors. Behind each decision support tool, there are analysis methods built upon mainly system dynamics principles. These tools are based on simulation platforms called Stella and Anylogic. Among other things, these tools are capable of assessing the performance of closed-loop supply chains, consequences of resource scarcity, potential gains from resource conservation and overall economic and environmental performance of circular manufacturing systems. / <p>QC 20170522</p> / ResCoM: Resource Conservative Manufacturing- transforming waste into high value resource through closed-loop product systems

Manufacturing industry is under permanent pressure to maintain its economic growth and profitability as strong societal backbone. At the same time pressures of waste generation and resource consumption are increasing as result of manufacturing operations. Since manufacturing industry is one of the major consumers of natural resources it is therefore essential to reduce dependency on natural resources by decoupling economic growth from consumption. Resource efficiency approaches can improve the performance of production systems by reducing resource losses. However, the fundamental assumption at the basis of resource efficiency approaches is that resources are available infinitely. As a consequence, challenges of sustainability and resource scarcity remain inadequately addressed. The objective of this research is to develop analysis methods and decision support tools for manufacturing industry to facilitate its transition from linear production systems to circular manufacturing systems, which are economically viable and environmentally sustainable. The initial scope of study focuses on industrial resource efficiency assessment in production systems. Expanding the view to a manufacturing system perspective, the current research is explored with regard to circular manufacturing systems in the context of economic benefits, resource scarcity and waste generation. Systematic analysis methods and decision support tools are developed for industrial companies to facilitate the adaption of circular manufacturing systems. These developments are supported by industrial case studies. The analysis methods are to the largest extent based on agent-based simulation approaches. The tools are capable of assessing the economic and environmental impact of different business models, design strategies as well as supply chains settings. Moreover, the tools are able to determine whether introductions of new (circular) business models will be adopted by customers. One empirical market study is performed to investigate value propositions of a circular business approaches based on customer decisions. / <p>QC 20170825</p>

As the awareness of the impact of human activities on the environment, economy, and society has been brought to spotlight during the last decades, sustainable development has gained ever-increasing attention around the world. While industrial revolutions are critical for the efficiency of meeting customer needs, it is also crucial to address and reverse the depletion of Earth’s resources. That is why the concept of circular economy has been introduced and implemented in the manufacturing sector, which aims for a shift in paradigm towards closed-loop “systems that are restorative or regenerative by intention and design”. However, while bringing forward an amplitude of opportunities, there are challenges and barriers in the implementation of the principles of circular economy in manufacturing systems. This is where another area of science can contribute: Industry 4.0. Industry 4.0 refers to the incorporation of technological advancements in all stages of the life cycle to provide meaningful and real-time information, in order to aid decision-making regarding different functions of the manufacturing systems, i.e., business model, product design, and supply chain. It has been proven in literature that there are major opportunities in merging Industry 4.0 with circularity principles. However, there is a research gap on what the prerequisites are for a successful transition towards a more circular manufacturing system with the support of digital technologies. This research attempts to fill in this gap by conducting a qualitative study, interviewing practitioners and academics involved in real-life cases of such transitions. The study contributes to the existing body of knowledge by suggesting a list of seventeen prerequisites, categorised into three themes of cultural, organisational and business-related, and technical prerequisites. The main audience of this study is the manufacturing companies who want to increase their chances of success when embarking on a transition towards more circular manufacturing systems. / Under de senaste decennierna så har människans effekter på miljön, ekonomin och samhället kommit att få en allt större roll, och begreppet hållbar utveckling har kommit att få stort genomslag runt om i världen. Teknisk utveckling inom produktion, som historiskt sett mest bidragit till ökad effektivitet och bättre erbjudanden till kunderna, har i det här sammanhanget även en viktig roll i att vända utarmningen av jordens resurser. Begreppet cirkulär ekonomi, som introducerats och implementeras inom produktion, beskriver denna vändning. Begreppet syftar till ett paradigmskifte mot slutna "system som är återställande eller regenerativa genom avsikt och design". Förutom möjligheterna med cirkulär ekonomi inom produktion finns även en rad utmaningar och hinder med att införa cirkulära produktionssystem. Ett teknikområde som kan bidra till att åtgärda dessa utmaningar och hinder är Industri 4.0. Industri 4.0 förespråkar införandet av ny teknologi i alla stadier av en produkts livscykel, för att ge meningsfull information i realtid och hjälpa beslutsfattandet inom alla faktorer i ett produktionssystem: affärsmodell, produktutveckling och värdekedjor. Tidigare litteratur har rapporterat om stora möjligheter med att använda Industri 4.0 för ökad cirkulär ekonomi. Det finns dock en lucka i forskningen kring vilka förutsättningar som krävs för en lyckad övergång till mer cirkulära tillverkningssystem med stöd av digitala tekniker. Detta examensarbete försöker fylla denna lucka med hjälp av en kvalitativ studie, baserad på intervjuer med industrirepresentanter och akademiker som deltagit i verkliga fall av sådana övergångar. Studien bidrar till tidigare litteratur genom att föreslå en lista med sjutton förutsättningar, kategoriserade i tre teman: kulturella-, organisatoriska och affärsmässiga-, och tekniska förutsättningar. Den huvudsakliga målgruppen för studien är tillverkande företagen som vill öka sina chanser att lyckas när man påbörjar en övergång till mer cirkulära tillverkningssystem.

The circular economy concept provides a model to minimize waste creation while at the same time maximizing value potential. Much attention has been given by researchers to the circular economy and its potential for society from a holistic perspective. However, there exists a scarce widespread exploration of studies about the practical implementation challenges of circular economy seen from a company perspective. This is especially true when looking at the circular business model of reusing products. This research is a qualitative case study that explores the challenges of product reuse through the lens of the Circular Manufacturing Systems framework (CMS). Unlike what was found in the literature review, the results showed that the challenges for reuse were highly concentrated on packaging and ownership. Furthermore, other found challenges that were more anticipated and agreed with the literature were tracking and transparency of products throughout the supply chain. The study’s most apparent contribution and conclusion is that the ownership of handled products in a product reuse supply chain is important in order to overcome many of the found challenges, for example, process/product improvements and communication effectiveness. However, while ownership of the products is an important factor for improving reuse, this research further highlights the importance of the dynamic relations between the four pillars of the CMS-framework to benefit from a reuse-oriented business model. / Konceptet Cirkulär Ekonomi är en modell för att minimera avfall samtidigt som det höjer värdepotentialen. Mycket uppmärksamhet har givits till den cirkulära ekonomin och dess potential för samhället från ett holistiskt perspektiv. Det existerar emellertid en saknad av studier om de praktiska implementeringssvårigheterna av cirkulär ekonomi sett från ett företagsperspektiv. Detta är speciellt sant vid observation av en cirkulär affärsmodell för återanvändning av produkter. Den här studien utgör en kvalitativ fallstudie som syftar till att utforska utmaningarna för återanvändning av produkter ur ett CMS-ramverksperspektiv. Till skillnad från de slutsatser som framkom i litteraturstudien, visade resultaten att utmaningarna för återanvändning var främst relaterade till paketering och ägandeskap. Funna utmaningar från resultaten som korrelerade bättre till litteraturen var som förväntat spårning och transparens av produkter i leveranskedjan. Studiens mest påtagliga bidrag och slutsats är att produktägandeskap i en leveranskedja som hanterar återanvändning är viktig för att övervinna många av de funna utmaningarna som exempelvis process/produktförbättringar och kommunikationseffektivitet. Dock, medan ägandeskap av produkterna är en viktig faktor för att förbättra återanvändning belyser denna studie vikten av de dynamiska relationerna mellan de fyra pelarna i CMS ramverket. Detta för att främja en återanvändningsorienterad affärsmodell.