This dissertation work is focused on issues related to a purchasing process in business subjects. It examines issues related to an evaluation of suppliers for a particular order. It also deals with issues within supplier-purchaser relationship, its creation and management through the SCM - Supply Chain Management. The topic of this thesis is very progressive as the selection and the evaluation of the suppliers is a very important factor in the terms of purchase and purchase expenses. A good management of the supplier-purchaser relationship can save expenses to business subjects. The elaboration of this dissertation thesis used not just theoretical findings acquired from the Czech and international literature, but also findings from surveys. The primary survey was carried out through the quantitative research, in particular research questionnaires. The findings from the primary survey were evaluated through the application Microsoft Excel and UNISTAT ® Statistical Package Version 5.6.06 Light. The acquired results were used to define the most important factors, which affect an evaluation of suppliers as well as an evaluation of the SCM in companies and data about purchases in companies. In addition the findings from the research questionnaires helped to evaluate the appointed hypothesis of the dissertation thesis. A partial outcome of the dissertation thesis is the proposal of the methodology of the evaluation of new and current suppliers including the weighting of individual evaluation parameters. For a common suppliers’ evaluation, an evaluation frequency is set by the importance of supplied material. Additionally, it methodologically describes how to evaluate supplier in time for day-to-day supply and for one-off supply. An additional partial outcome is the proposal of the methodology for an evaluation of a level of the SCM. The conclusion of the dissertation thesis is dedicated to the summary of findings, discussion of preconditions for implementation of the proposed methodology to real situations and possibilities of an additional scientist work in appropriately related subjects.

Ziel dieser Arbeit war es, systematisch Möglichkeiten zur gezielten und qualitativen Entkopplung von Umweltauswirkungen im Rahmen der Verantwortungsaussage des SDG 12 in Bezug auf einzelne Stoffströme zu identifizieren. Zu diesem Zweck wurde ein Schema zur Bewertung der Verantwortung erstellt, das sich auf die Systemgrenzen der Umwelt und die systemischen Produktionsströme einzelner Materialien konzentriert. Einzelne generische Prozesseinheiten wurden identifiziert und Umweltindikatoren, die Planetary Boundaries, ausgewählt. Das entwickelte Schema wurde dann in einer Fallstudie mit dem Beispielmaterial Aluminium auf seine Funktionalität getestet, indem das Material mit den Umweltindikatoren in jeder Prozesseinheit seiner spezifischen Produktionsroute kalibriert wurde. Dabei zeigte sich, dass die entwickelte Bewertung in der Tat eine systematische Identifizierung des Entkopplungsraums innerhalb eines Materialflusses ermöglicht und somit als funktional und übertragbar auf andere Materialflüsse und andere Dimensionen wie die soziale oder wirtschaftliche sowie die Verbrauchsdimension angesehen werden kann.:1 Introduction 2 Context of the Thesis 3 Sustainable Development Theories - The Road to Sustainable Industrial Development 4 Objectives and Structure of the Thesis 5 Development of a Responsibility Assessment Scheme 7 Aluminium as Key Material in our Society 8 The Aluminium Production System 9 Assessment Instructions 10 Case study – Aluminium Life Cycle and Planetary Boundary Matrix Calibration 11 Evaluation, Discussion of Results and Conclusion 12 Bibliography / This thesis aimed to systematically identify opportunities for targeted and qualitative environmental impact decoupling within the responsibility proposition of SDG 12 in relation to single material flows. To do this a responsibility assessment scheme was created that focused on the system boundaries environment and systemic production flows of single materials. Individual generic unit processes were identified and environmental indicators, the Planetary Boundaries, were chosen. The scheme designed was then tested in a case study for its functionality with the example material Aluminium, through calibrating the material with the environmental indicators in each unit process of its specific production route. This showed that the assessment designed indeed allowed for systematic identification of decoupling space within a material flow and can thus be considered as functional and transferrable to other material flows and other dimensions like the social or economic, as well as the consumption dimension.:1 Introduction 2 Context of the Thesis 3 Sustainable Development Theories - The Road to Sustainable Industrial Development 4 Objectives and Structure of the Thesis 5 Development of a Responsibility Assessment Scheme 7 Aluminium as Key Material in our Society 8 The Aluminium Production System 9 Assessment Instructions 10 Case study – Aluminium Life Cycle and Planetary Boundary Matrix Calibration 11 Evaluation, Discussion of Results and Conclusion 12 Bibliography