TY - CHAP A1 - Kellner, Florian A1 - Utz, Sebastian T1 - Using Inverse Optimization to Discover Sustainability Priorities in Purchasing Decisions T2 - International Conference on Operations Research 2023 Y1 - 2023 ER - TY - CHAP A1 - Kellner, Florian A1 - Utz, Sebastian T1 - Exploring Sustainability Priorities in Purchasing Decisions Based on Inverse Optimization T2 - NAMA Conference 2023 Y1 - 2023 ER - TY - BOOK A1 - Lukesch, Maximilian A1 - Kellner, Florian T1 - Übungsbuch Produktionswirtschaft BT - Planung, Steuerung und Industrie 4.0 N2 - Dieses Buch bietet Studierenden über 80 Übungsaufgaben und fünf Fallstudien inklusive ausführlicher Lösungen zu ausgewählten Themen der Produktionswirtschaft und Industrie 4.0. Jedes Kapitel enthält eine kurze Einleitung sowie zu erreichende Lernziele. Querverweise auf das Lehrbuch „Produktionswirtschaft“ von Kellner/Lienland/Lukesch erleichtern das Selbststudium und ermöglichen eine optimale Prüfungsvorbereitung. Die 3. Auflage wurde redigiert und um neue Rechenaufgaben sowie eine weitere Fallstudie zum Themenbereich Industrie 4.0 ergänzt. KW - Produktion KW - Leistungserstellung KW - Industrie 4.0 KW - Supply Chain Management KW - Operatives Produktionsmanagement KW - Produktionsfaktoren KW - Produktionsplanung KW - Lineare Programmierung KW - Reihenfolgeplanung KW - Produktionssteuerung KW - Mensch KW - Betriebsmittel KW - Material KW - Information KW - Bedarfsrechnung KW - Materialbedarfsplanung KW - Übungsbuch Produktionswirtschaft Y1 - 2024 U6 - https://doi.org/10.1007/978-3-662-68672-0 PB - Springer Gabler CY - Berlin, Heidelberg ET - 3 ER - TY - JOUR A1 - Kraft, Sarah Katharina A1 - Quayson, Matthew A1 - Kellner, Florian T1 - Assessing the German Act on Corporate Due Diligence Obligations in Supply Chains: a perspective from the smallholder cocoa farmer JF - Frontiers in Sustainability N2 - This research examines the potential outputs, outcomes, and impacts of the German Act on Corporate Due Diligence Obligations in Supply Chains (LkSG) on the smallholder cocoa farmers in West Africa. The study primarily relies on a literature review and an impact pathway to conduct a systematic analysis to identify the potential effects of the LkSG on smallholder cocoa farmers. The findings indicate that some, but not all of the risks addressed by the LkSG align with those faced by smallholder cocoa farmers and their families. Additionally, the research also reveals weaknesses, particularly in managing environmental risks, which the LkSG does not adequately cover. Our findings show that in the short- and medium-term, the LkSG has no potential effects on smallholder cocoa farmers. Furthermore, the potential positive impacts of the law on smallholder cocoa farmers will take a long time to realize, as the LkSG considers primarily tier-1 suppliers. Companies in Germany might reassess their supply chains to strive for an LkSG-risk-free supply chain, which could in the long term have sustained impacts on smallholder cocoa farmers. However, we recommend a comprehensive risk analysis of the cocoa supply chain to enhance the human rights of cocoa farmers. KW - sustainability KW - due diligence KW - supply chain KW - smallholder cocoa farmer KW - human rights KW - LkSG KW - West Africa KW - Germany Y1 - 2024 U6 - https://doi.org/10.3389/frsus.2024.1376619 VL - 5 ER - TY - JOUR A1 - Kraft, Sarah Katharina A1 - Quayson, Matthew A1 - Kellner, Florian T1 - Assessing the German Act on Corporate Due Diligence Obligations in Supply Chains: a perspective from the smallholder cocoa farmer JF - Frontiers in Sustainability N2 - This research examines the potential outputs, outcomes, and impacts of the German Act on Corporate Due Diligence Obligations in Supply Chains (LkSG) on the smallholder cocoa farmers in West Africa. The study primarily relies on a literature review and an impact pathway to conduct a systematic analysis to identify the potential effects of the LkSG on smallholder cocoa farmers. The findings indicate that some, but not all of the risks addressed by the LkSG align with those faced by smallholder cocoa farmers and their families. Additionally, the research also reveals weaknesses, particularly in managing environmental risks, which the LkSG does not adequately cover. Our findings show that in the short- and medium-term, the LkSG has no potential effects on smallholder cocoa farmers. Furthermore, the potential positive impacts of the law on smallholder cocoa farmers will take a long time to realize, as the LkSG considers primarily tier-1 suppliers. Companies in Germany might reassess their supply chains to strive for an LkSG-risk-free supply chain, which could in the long term have sustained impacts on smallholder cocoa farmers. However, we recommend a comprehensive risk analysis of the cocoa supply chain to enhance the human rights of cocoa farmers. KW - sustainability KW - due diligence KW - supply chain KW - smallholder cocoa farmer KW - human rights KW - LkSG KW - West Africa KW - Germany Y1 - 2024 U6 - https://doi.org/10.3389/frsus.2024.1376619 VL - 5 ER - TY - BOOK A1 - Lukesch, Maximilian A1 - Kellner, Florian T1 - Übungsbuch Produktionswirtschaft BT - Planung, Steuerung und Industrie 4.0 N2 - Dieses Buch bietet Studierenden über 80 Übungsaufgaben und fünf Fallstudien inklusive ausführlicher Lösungen zu ausgewählten Themen der Produktionswirtschaft und Industrie 4.0. Jedes Kapitel enthält eine kurze Einleitung sowie zu erreichende Lernziele. Querverweise auf das Lehrbuch „Produktionswirtschaft“ von Kellner/Lienland/Lukesch erleichtern das Selbststudium und ermöglichen eine optimale Prüfungsvorbereitung. Die 3. Auflage wurde redigiert und um neue Rechenaufgaben sowie eine weitere Fallstudie zum Themenbereich Industrie 4.0 ergänzt. KW - Produktion KW - Leistungserstellung KW - Industrie 4.0 KW - Supply Chain Management KW - Operatives Produktionsmanagement KW - Produktionsfaktoren KW - Produktionsplanung KW - Lineare Programmierung KW - Reihenfolgeplanung KW - Produktionssteuerung KW - Mensch KW - Betriebsmittel KW - Material KW - Information KW - Bedarfsrechnung KW - Materialbedarfsplanung Y1 - 2024 U6 - https://doi.org/10.1007/978-3-662-68672-0 PB - Springer Gabler CY - Berlin, Heidelberg ET - 3 ER - TY - JOUR A1 - Kellner, Florian A1 - Utz, Sebastian T1 - An inverse optimization approach for studying sustainability preferences in sourcing decisions JF - Journal of Cleaner Production N2 - Throughout many societies around the globe, there is growing awareness of the urgent need for the transition towards a sustainable economy. Research shows that buying firms have substantial leverage to initiate sustainable development by controlling the sustainable performance of their suppliers. In that context, this article presents a novel methodology based on inverse optimization to derive the implicit preferences of decision-makers in the trade-off between traditional sourcing objectives and sustainability in the supplier selection and order allocation process. The derived implicit preferences can then be used for further analyses to gain a better understanding of the characteristics of purchasing managers and sourcing situations that come with particularly high/low preferences placed on sustainability. Since the inverse optimization approach is computationally resource-intensive and consumes a significant amount of time, we present a scalable state-of-the-art cloud architecture that allows solving an arbitrary number of optimization programs in an acceptable amount of time. We demonstrate the feasibility of the proposed methodology in a real-world case. In doing so, we test how important sustainability aspects are in the supplier selection and order allocation decisions of one of the world's largest automotive parts manufacturers. KW - Supplier selection KW - Order allocation KW - Sourcing decisions KW - Sustainability KW - Inverse optimization Y1 - 2024 U6 - https://doi.org/10.1016/j.jclepro.2024.144305 VL - 483 ER -