The current patterns of consumption are threatening the availability of natural resources. These natural resources, such as raw materials and biomass, are critical for different economic activities. ProductService System (PSS) has received attention as a solution to drive resource efficiency by extending the life cycle of products. Given the many barriers to shifting from product to PSS-based offering, the literature has acknowledged the importance of partnerships to support Small and Medium-SizedManufacturers (SMMs) during the life cycle of PSS. However, the role played by the partner in supporting the SMM, as well as how are they supporting to overcome existing barriers, remains unclear. To address this gap, the present thesis to aims comprehensively identify the multifaceted role of external partners throughout the life cycle of PSS developed by SMM. The research follows a cross-sectional design to investigate three industry sectors located in Finland, Norway, and Sweden: forestry, farming, and mining machinery manufacturers. Through semi-structured qualitative interviews with CEOs and directors, data was collected and analyzed by thematic analysis. The results show the existence of eight key partners along the life cycle of PSS: Dealers, Suppliers, End Customers, Service Providers, Industry Hubs, Parent Company, New Partners (such as KIBS firms),and Other, such as the ones associated with delivery. These partners were found to support SMMs by co-creation (joint activities involving the exchange of resources between the partner and SMM), education (knowledge sharing from the partner to the SMM), market-related roles (activities associated with the end user, such as sales, marketing, and service provision), and supply chain (roles liked to supply of components and logistics). Partners can drive the shift from current product-oriented PSStowards use- and result-oriented ones, which have a higher potential of creating environmental benefits. The findings of this thesis contribute to the existing literature in many ways. First, it clarifies how partners are supporting SMMs along the life cycle of PSS. Second, it shows that some partners, such as dealers, are more important through the life cycle than other partners. Third, it shows that SMMs opt for different partners to perform the same role. Therefore, it opens the opportunity for future research questions to investigate the causes behind such choices. In terms of practical implications, the thesis support SMMs to optimize and diversify their network of partners by considering partnership alternatives. From the partner’s point of view, it shows the expectations of the SMMs for their partners. Therefore, it can be used to improve the existing solutions aiming to better address the SMMs’ needs.

Trends such as globalization, increased customer demands and the increased sustainability challenge are forcing medium sized manufacturers to rethink their production processes and start developing lean and sustainable production systems.Many of the developed tools and methods for the lean and sustainable production presented in the literature are not well suited for medium sized manufacturers with a lack of empirical case studies, and therefore investigating suitable approaches for improving the production and sustainability performances is needed in their case. This thesis proposes to use a mixture of tools from both the Lean and sustainable development literature for creating a lean and sustainable production roadmap for medium sized manufacturers. It demonstrates a case study conducted at a medium sized roller blind manufacturer who is preparing to introduce lean and enhancing their sustainability at the production to cope with the condensed market and their customer requirements. The study analyzes the manufacturing processes from both the lean and sustainability perspectives, where different tools were adopted and used throughout the work, which are: Value Stream Mapping, Sustainable Life Cycle Assessment, and Sustainability Compliance index, with the data collected through interviews, dialogues, observations, time studies and internal documents. Understanding the company specific problems and value acted as a foundation for further analysis and improvement potentials identification to reach a future lean and sustainable state in the production, which resulted in enhancing the firm´s lean and sustainability performances. This thesis complement the lean initiatives with a sustainability assessment effort to grasp the whole picture and generate ultimate improvement potentials in order to cope with today´s evolving trends and the increased sustainability requirements. A main contribution is the developed guidelines for creating a lean and sustainable production roadmap for medium sized manufacturers, which result in leveraged benefits satisfying both the lean and sustainable needs. / Trender såsom ökad globalisering, nya kundkrav och ökade utmaningar inom hållbarhet, leder till att medelstora tillverkningsföretag tvingas att tänka om gällande produktionsprocesser och börja utveckla koncept inom lean och hållbar produktion.Många av de utvecklade verktygen och metoderna inom lean och hållbar produktion, som återfinns i litteraturen, är inte väl lämpade för medelstora tillverkningsföretag och saknar empiriska fallstudier. Detta motiverar till vidare analys kring lämpliga metoder för att öka prestationen inom produktion och hållbarhet för dessa företag. Denna uppsats går igenom de olika verktyg som finns definierade i litteraturen, både ifrån lean och hållbarhetsutveckling, och föreslår en väg framåt för att skapa en optimerad och hållbar produktion för medelstora tillverkningsföretag.Denna uppsats demonstrerar en fallstudie utförd på en medelstor rullgardinstillverkare som är beredd att introducera lean och öka deras hållbarhetsperspektiv i produktionen. Detta för möta den mättade marknaden och deras kundkrav. Studien analyser tillverkningsprocesserna från både lean och hållbarhetsperspektiv, där olika verktyg har blivit anpassade och testade under hela processen (Value Stream Mapping, Sustainable Life Cycle Assessment och Sustainability Compliance index). Uppgifterna som använts har samlats in genom intervjuer, dialoger, observationer, tidsstudier och intern dokumentation. Förståelse av företagets specifika problem gav en grund för vidare analys, där förbättringspotentialer identifierades för att nå ett framtida lean och hållbarhetsperspektiv i produktionen. Uppsatsens resultat bidrog till reella förbättringar för företaget inom området. Denna uppsats drar slutsatsen att komplettering utav lean initiativ med hållbarhetsutvärdering är nödvändigt för att få fram en helhetsbild kring en optimal förbättringspotential. På så sätt kan företagen bättre klara av dagens nya trender med ökade hållbarhetskrav. De utvecklade riktlinjerna för att skapa en lean och hållbar produktion i ett medelstort tillverkningsföretag resulterar i fördelar som uppfyller kraven både från ett lean och i hållbarhetssynpunkt.