Η αξιολόγηση και επιλογή προμηθευτών αποτελεί μια απαραίτητη επιχειρησιακή λειτουργία για την επίτευξη βέλτιστων δυνατών προμηθειών. Λόγω της φύσης του προβλήματος αυτού, οι μέθοδοι Πολυκριτηριακής Ανάλυσης μπορούν να παίξουν αποφασιστικό ρόλο στην επίλυσή του. Η εργασία αυτή μελετά και παρουσιάζει τα πιο συνηθισμένα κριτήρια καθώς και τις πιο διαδεδομένες μεθόδους της Πολυκριτηριακής Ανάλυσης για την αξιολόγηση και επιλογή προμηθευτών των επιχειρήσεων. Στο πρώτο μέρος της εργασίας αυτής, παρουσιάζεται το θεωρητικό υπόβαθρο, όπου γίνεται αναφορά στις έρευνες προηγούμενων μελετητών του προβλήματος της αξιολόγησης και επιλογής προμηθευτών, ομαδοποιώντας μια σειρά από τους σημαντικότερους παράγοντες για την επιλογή προμηθευτών. Στη συνέχεια παρουσιάζονται οι πλέον χρηστικές μέθοδοι Πολυκριτηριακής Ανάλυσης στην αξιολόγηση προμηθευτών με αντίστοιχα παραδείγματα. Στο δεύτερο μέρος γίνεται εφαρμογή της μεθόδου της Αναλυτικής Διαδικασίας Ιεράρχησης (ΑΗΡ) συνδυάζοντάς την με Γραμμικό Προγραμματισμό, επί των πραγματικών δεδομένων της μικρομεσαίας επιχείρησης επεξεργασίας νερού Health Affair, για αξιολόγηση και επιλογή των προμηθευτών της. / Vendor selection and evaluation is a very important process for all kinds of firms. Due to the nature of the vendor selection problem, Multicriteria methods can play a decisive role to its solution. This work examines and presents the most commonly used criteria and the most widespread Multicriteria methods for vendor selection and evaluation. In the first part of the project, the Theoretical Framework is presented, where the work of previous researchers is mentioned, by grouping some of the most vital criteria in vendor selection process. Moreover, the most useful Multicriteria methods in vendor selection are analyzed into their corresponding examples. In the second part of the project, the method of Analytical Hierarchy Process (AHP) in combination with Linear Programming is implemented on the real data of a Greek water treatment SME.

No description available.

Bakgrund: I maj 2017 beslutades det att EU-reglering 2017/821 om konfliktmineraler kommer träda i kraft den 1a januari 2021. Regleringen kräver att företag inom EU kan försäkra sig om att tenn, volfram, tantal och guld (3TG) endast importeras från ansvarsfulla och konfliktfria källor. Inom litteraturen presenteras en problematik kring försörjningskedjors komplexitet och svårigheterna att spåra konfliktmineraler. Studien avser därför att skapa ökad förståelse för leverantörshantering avseende konfliktmineraler och praktiska implikationer för bolag som önskar ökad förståelse inför införandet av EU-reglering 2017/821.  Syfte: Syftet är att skapa ökad förståelse för hur företag strategiskt arbetar mot hållbarhet genom leverantörshantering avseende konfliktmineraler, samt vilka möjligheter respektive utmaningar som kan uppstå under detta förändringsarbete. Metod: Studien har ett realistiskt perspektiv samt ett induktivt angreppssätt med abduktiva inslag. Kvalitativ data har inhämtats genom sex semistrukturerade intervjuer med representanter från Atlas Copcos inköpsfunktioner, från två affärsområden, som arbetar med alternativt är bekanta med Atlas Copcos upprättade process för leverantörshantering avseende konfliktmineraler. Slutsats: Studieförfattarna finner att strategiskt arbete mot hållbarhet genom leverantörshantering avseende konfliktmineraler kan delas upp i tre övergripande områden; identifiering av prioriterade intressenter, utveckling av förändringsarbetesstrategier samt strategiska partnerskaps bidrag till synlighet inom leverantörskedjan. Dessa tre aspekter bidrar tillsammans till identifieringen och arbetet med möjligheter respektive utmaningar inför fortsatt hållbarhetsarbete med leverantörshantering avseende konfliktmineraler, vilket kan sammanfattas genom fortsatt utveckling av intern dialog samt värdet av att arbeta med Supplier Relationship Management. Kunskapsbidrag: Studiens teoretiska kunskapsbidrag är att skapa ökad förståelse för hur drivkrafter för implementering av hållbarhetsarbete, förändringsarbete samt arbete med försörjningskedjan kan bearbetas inom kontexten för leverantörshantering vid hållbarhetsarbete, samt hur dessa aspekter inverkar på varandra. / Problem discussion: In May 2017, it was determined that EU-regulation 2017/821 will enter into force the 1st of January 2021. The regulation requires that companies within the EU are able to assure that tin, tungsten, tantalum and gold (3TG) merely is imported from responsible and conflict free sources. Within literature, issues regarding supply chain complexity and difficulties with tracking conflict minerals are presented. This study therefore aims to create increased understanding for supplier management regarding conflict minerals and practical implications for other companies that aim for increased understanding before the introduction of EU-regulation 2017/821. Aim: The aim is to create increased understanding for how companies strategically work towards sustainability through supplier management regarding conflict minerals, and which opportunities respective challenges that may occur during the process of change. Method: This study has a realistic perspective and an inductive approach with abductive features. Qualitative data has been obtained through six semi structured interviews with representatives from Atlas Copco’s sourcing functions, from two business areas, who work with or are familiar with Atlas Copco’s constructed process for supplier management regarding conflict minerals. Results: The authors of this study find that strategic work towards sustainability regarding conflict minerals can be divided into three overall subjects; the identification of prioritized stakeholders, development of change management strategies and strategic partnerships contribution to visibility within the upstream part of the supply chain. These three aspects contribute to the identification and work with possibilities and challenges regarding continued sustainability efforts with supplier management concerning conflict minerals, which can be summarized through continued development of internal communication and the value of working with supplier relationship management. Science contributions: The study’s theoretical science contribution is to create increased understanding for how drivers for implementation of sustainability efforts, change management and work with the supply chain can be processed within the context of supplier management concerning sustainability work, and how these aspects affect each other.

The diploma thesis is focused on the performance evaluation of key suppliers in the terms of quality in selected cosmetic company. The aim of this thesis is to propose a solution of the assigned project task, based on short-term internship and theoretical knowledge, concerning the graphical visualization of key suppliers performance evaluation. The work is divided into theoretical and practical part. The theoretical part describes basic information about management quality system, it´s principles, conceptions and tools. There is also a closer look at the importance of purchasing department and the suppliers performance evaluating methods. The practical part includes characteristics of selected cosmetic company and processes of the quality control department are described, including laboratory tests. Withing the given project, the practical part is further divided into 6 tasks. The main task involves designing a platform for a simple and effective evaluation of the key suppliers performance in terms of quality. Other sub-tasks involved the compilation of strategic suppliers, a proposal for categorizing suppliers, and for the needs of the organization, also a procedure for communication with suppliers in case the quality requirements were not met.

Submitted by Caroline Falcao (caroline.rfalcao@ufpe.br) on 2017-06-01T17:19:38Z No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) Patricia TESE.pdf: 2509023 bytes, checksum: 8b18c1c702d02a05b1c449ff04234257 (MD5) / Made available in DSpace on 2017-06-01T17:19:38Z (GMT). No. of bitstreams: 2 license_rdf: 811 bytes, checksum: e39d27027a6cc9cb039ad269a5db8e34 (MD5) Patricia TESE.pdf: 2509023 bytes, checksum: 8b18c1c702d02a05b1c449ff04234257 (MD5) Previous issue date: 2012-06-18 / Para que o processo colaborativo ocorra de forma eficiente, as atividades de identificar os melhores fornecedores para um novo produto ou serviço ou avaliar o desempenho de um fornecedor antigo são tarefas essenciais no gerenciamento da cadeia de suprimentos. O problema de seleção de fornecedores se enquadra no contexto multicritério por envolver diversos critérios qualitativos e quantitativos na tomada de decisão. Esta pesquisa tem como principal objetivo propor um modelo de apoio à decisão para a classificação de fornecedores em níveis de colaboração no gerenciamento da cadeia de suprimentos de uma forma estruturada, utilizando o método ELECTRE TRI. Diversos trabalhos têm explorado o problema de seleção de fornecedores no contexto multicritério. A maioria destes estudos aborda as problemáticas de escolha e ordenação e são propostos métodos específicos para este fim. A problemática de classificação não é muito explorada e, além disso, existem poucos trabalhos que tratam especificamente do assunto colaboração com fornecedores no contexto multicritério. Considerando que na maioria dos casos, em diversos ramos de atuação, as empresas possuem em sua base, fornecedores com características e graus de desempenho diferentes, torna-se necessário decidir em que nível colaborar com cada tipo de fornecedor. Com a utilização do modelo proposto torna-se possível gerenciar os fornecedores, considerando suas diferenciação em termos de desempenho, classificando-os em níveis de colaboração apropriados, de forma a viabilizar a adoção de estratégias distintas com cada categoria. Desta forma, é possível que a decisão no contexto apresentado ocorra de forma sistematizada, e tendo em vista a natureza repetitiva deste problema, o modelo proposto se constitui em uma ferramenta útil de apoio à decisão, a qual pode ser utilizada periodicamente de acordo com as necessidades do decisor, a fim de fornecer feedback da avaliação dos fornecedores, acompanhar a evolução do desempenho nos critérios definidos e rever a estratégia adotada se necessário. / The processes of identifying the best suppliers for a new product or service or even to evaluate the performance of an existing supplier are essential tasks in managing the supply chain, in order to enable that the collaborative process occurs in an efficient manner. The supplier selection problem (SSP) fits the multicriteria context due to involve several qualitative and quantitative criteria in the decision making process. So, the main objective of this research is to propose a model of multiple criteria decision aid for suppliers sorting in levels of collaboration in supply chain management, using ELECTRE TRI method. Several studies have approached the supplier selection problem in multicriteria context. Most of these studies address the choice and ranking problems and specific methods are proposed for this purpose. However, the sorting problem is not much explored, and in addition, there are few studies that specifically address the subject of collaboration with suppliers considering multicriteria context. Whereas in most cases, in several business segments, companies have at their base, suppliers with different features and degrees of performance, it becomes necessary to decide at what level to collaborate with each type of supplier. Thus, using the proposed model makes it possible to manage suppliers, considering their differentiation in terms of performance, sorting them into appropriate levels of collaboration in order to facilitate the adoption of different strategies with each category. Moreover, with the use of this model, it is possible that the decision in this context occurs in a systematic manner and, considering the repetitive nature of this problem, the proposed model constitutes a useful tool for decision aid. This tool can be used periodically in accordance with the needs of the decision maker in order to provide feedback of the evaluation to suppliers, monitoring the performance in the defined criteria set and, reviewing the strategy adopted if necessary.

The aim of this thesis is to evaluate sustainable procurement practices of companies in the Czech Republic. The thesis is divided in two parts. The first part focuses on theoretical background of sustainable procurement and its implementation in the company. The second part of the thesis elaborates on implementations of the theory outlined in the first part. Based on a survey, the author analyses sustainable procurement practices of large companies in the Czech Republic.

In this work we develop algorithms for the k-Supplier with Outliers problem. In a network, we are given a set of suppliers and a set of clients. The goal is to choose k suppliers so that the distance between every served client and its nearest supplier is minimized. Clients that are not served are called outliers and the number of allowed outliers is given on input. As k-Supplier with Outliers has numerous applications in logistics, we focus on parameters which are suitable for transportation networks. We study graphs with low highway dimension, which was proposed by Abraham et al. [SODA 2010], and low doubling dimension. It is known that unless P = NP, k-Supplier with Outliers does not admit a (3 − ε)-approximation algorithm for any constant ε > 0. The k-Supplier with Outliers problem is W[1]-hard on graphs of constant doubling dimension for parame- ters k and highway dimension. We overcome both of these barriers through the paradigm of parameterized approximation algorithms. In the case of highway dimension, we develop a (1 + ε)-approximation algorithm for any ε > 0 with running time f(k, p, h, ε) · nO(1) where p is the number of allowed outliers, h is the highway dimension of the input graph, and f is some computable function. In the case of doubling dimension, we develop a (1 + ε)-approximation...

The diploma thesis decsribes the company purchasing processes. The thesis is focusing on the company purchasing functions. It defines the working methods and the processes through which the purchasing processes are coordinated. The target is to describe the complexity of the system and its complete structure. The theoretical part presents theoretical solutions to the problems related to absence of the strategic purchasing in the company. It describes the missing processes and suggests how to implement the strategic sourcing department. The practical part is focusing on presenting the solution to problems related to material procuring based on the company financial analysis. The goal is to implement missing processes in the company organization a to focus on the supplier selection and the supplier development as the key purchasing problem. The diploma thesis describes the purchasing system in its complexity. The thesis is structurized to describe every single function and process ensuring that the material procurement works effectively and efficiently.

C­lem t©to diplomov© prce je nvrh vhodn© metody, jak vyhodnotit dodavatele model letadel a leteck©ho p­sluenstv­ holandsk© spoleÄnosti Aviation Megastore. Tato poleÄnost existuje na trhu ji v­ce ne 25 let a m v­ce ne 170 dodavatel po cel©m svÄtÄ. Proto vznikla poteba jednotliv© vrobce a distributory ohodnotit a zvit jejich vvoj bÄhem jednotlivch let, p­padnÄ u nÄkterch vybranch dodavatel zvit vzhledem k neuspokojivm vsledkm monost ukonÄen­ spoluprce. Pro vyhodnocen­ bude pouit program MS Excel a MATLAB.

This diploma thesis deals with the application of quality tools in the production company. The theoretical part deals with the history of quality, its current status and mainly describes some of the basic quality tools. The practical part describes the current status of quality management in the company and the system of assessment and selection of suppliers. The conclusions and results of this diploma thesis should prove that by introducing a method for selection, supplier evaluation, the company will achieve cost reduction and the establishment of a beneficial supplier-customer relationship.