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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Garantie des vices cachés et "responsabilité contractuelle de droit commun" /

Coëffard, Paul. January 2005 (has links) (PDF)
Univ., Diss.--Zugl.: Poitiers, 2003.
12

Development of a warranty management system /

Lyons, Kent Frederick. January 2001 (has links) (PDF)
Thesis (M. Eng. Sc.)--University of Queensland, 2002. / Includes bibliographical references.
13

Consumers' perceptions of extended service contracts : an empirical analysis /

Caudill, Donald W., January 1993 (has links)
Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1993. / Vita. Abstract. Includes bibliographical references (leaves 233-240). Also available via the Internet.
14

Opportunistic replacement warranty policy /

Erke, Yeșı̇m, January 1997 (has links)
Thesis (Ph. D.)--Lehigh University, 1997. / Includes vita. Includes bibliographical references.
15

Die Mängelhaftung im Werkvertrag /

Frye, Erich. January 1933 (has links)
Thesis (doctoral)--Universität Marburg.
16

Determination of optimal pricing and warranty policies

Mutlu, Özcan. January 1999 (has links)
Thesis (Ph. D.)--West Virginia University, 1999. / Title from document title page. Document formatted into pages; contains xii, 147 p. : ill. Includes abstract. Includes bibliographical references (p. 100-113).
17

The effectiveness of the Magnuson-Moss Warranty Act based on consumers knowledge and use of written warranties

Meyer, Susan. January 1979 (has links)
Thesis (M.S.)--University of Wisconsin--Madison. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 93-95).
18

Proposta de método de análise de confiabilidade de sistemas eletrônicos empregando dados de retorno em garantia. / Proposal of reliability analysis method of electronic systems using warranty data.

Danielli Villar Lemes 26 June 2006 (has links)
Atualmente, a grande concorrência de mercado faz com que as empresas busquem maior confiabilidade e qualidade em seus produtos, aumentando assim a confiança e fidelidade de seus clientes. Além disso a diminuição dos gastos com garantia e a possibilidade de extensão da mesma é um grande diferencial de mercado, e pode ser obtido com a realização de estudos de confiabilidade dos sistemas e equipamentos. Este trabalho propõe um método para esse estudo e apresenta um caso exemplo, aplicando o método sugerido, e, propondo melhorias. O presente trabalho reúne conceitos básicos de confiabilidade, apresentando as ferramentas mais utilizadas e explana sobre análise de dados de retorno em garantia. São propostas também algumas soluções para vencer as dificuldades possíveis de serem encontradas. O método consiste em adequar os dados obtidos, de um banco de dados qualquer, para se realizar uma análise de confiabilidade partindo do conhecimento do produto através de materiais apropriados e da execução da árvore funcional, seguida da Análise de Modos e Efeitos de Falha, e, realizando a análise dos dados de garantia, classificando o tipo de registro, como suspenso, completo ou agrupado, e atribuindo a aproximação dos dados a uma distribuição estatística adequada para se calcular os parâmetros e obter a confiabilidade do equipamento ou sistema. A partir dessa análise dos dados é possível se obter relações de sazonalidade entre falhas, entre falhas e lotes de produção, entre tempos até a falha, além de estimativas de confiabilidade e taxa de falha, entre outras. Além disso, é possível se realizar a validação da análise de modos e efeitos de falha a partir dos dados de retorno em garantia. A aplicação do método é realizada através de um caso exemplo, central telefônica. O estudo segue o modelo proposto e, de posse da estimativa de confiabilidade, é possível se calcular os custos de garantia e realizar melhorias, principalmente no banco de dados de retorno em garantia, para que a análise seja cada vez mais precisa. / Nowadays, the great market competition makes that the companies look for higher reliability and quality in their products, the customers' fidelity trust. Besides the decrease of the expenses with warranty makes possible its extension which is a great market differential this objective can be accomplished with product reliability – based analysis. The objective of this work is to propose a method for that study and to present an example of analysis, proposing improvements and validation the suggested method. The present work gathers basic reliability concepts, presenting the most used tools for data associated with warranty period. The method consists on adapting the failure data, of any database, to develop a reliability analysis, following basic steps such as product analysis based on functional trees, followed by the Failure Mode, Effects and Analysis, to define the critical components and, to accomplish the analysis of the warranty data, the failure data are classified as suspended complete or contained, and an appropriate statistical distribution is adjusted to evaluate the reliability of the equipment or system. Starting from that data analysis it is possible to obtain seasonal relationships among faults, between faults and production lots, among times to failures. Besides, it is possible to validate the Failure Mode, Effects and Analysis based on warranty registers. The application of the method is demonstrated through an example, involving the reliability analysis of an analogic PABX of. The study follows the proposed model and, based on reliability estimative, it is possible to calculate the warranty costs and to propose possible product and data collection improvements, mainly in the warranty database in order to improve the reliability analysis results.
19

Die Umsetzung der Verbrauchsgüterkaufrichtlinie in Deutschland und Grossbritannien /

Gärtner, Anette, January 2006 (has links)
Thesis (doctoral)--Universiẗat Bonn, 2005. / Includes bibliographical references (p. 119-167).
20

Modelling and analysis of reliability and costs for lifetime warranty and service contract policies

Rahman, Anisur January 2007 (has links)
Reliability of products is becoming increasingly important due to rapid technological development and tough competition in the product market. One effective way to ensure reliability of sold product/asset is to consider after sales services linked to warranty and service contract. One of the major decision variables in designing a warranty is the warranty period. A longer warranty term signals better reliability and provides higher customer/user peace of mind. The warranty period offered by the manufacturer/dealer has been progressively increasing since the beginning of the 20th Century. Currently, a large number of products are being sold with long term warranties in the form of extended warranty, warranty for used product, long term service contracts, and lifetime warranty. Lifetime warranties and service contracts are becoming more and more popular as these types of warranties provide assurance to consumer for a long reliable service and protecting consumers against poor quality and the potential high cost of failure occurring during the long uncertain life of product. The study of lifetime warranty and service contracts is important to both manufacturers and the consumers. Offering a lifetime warranty and long term service contracts incur costs to the manufacturers/service provider over the useful life of the product/contract period. This cost needs to be factored into the price/premium. Otherwise the manufacturer/ dealer will incur loss instead of profit. On the other hand, buyer/user needs to model the cost of maintaining it over the useful life and needs to decide whether these policies/service contracts are worth purchasing or not. The analysis of warranty policies and costs models associated with short-term or fixed term policies have received a lot of attention. A significant amount of academic research has been conducted in modelling policies and costs for extended warranties and warranty for used products. In contrast, lifetime warranty policies and longer term service contracts have not been studied as extensively. There are complexities in developing failure and cost models for these policies due to the uncertainties of useful life, usage pattern, maintenance actions and cost of rectifications over longer period. This thesis defines product's lifetime based on current practices. Since there is no acceptable definition of lifetime or the useful life of product in existing academic literatures, different manufacturer/dealers are using different conditions of life measures of period of coverage and it is often difficult to tell whose life measures are applicable to the period of coverage (The Magnuson-Moss Warranty Act, 1975). Lifetime or the useful life is defined in this thesis provides a transparency for the useful life of products to both manufacturers/service provider and the customers. Followed by the formulation of an acceptable definition of lifetime, a taxonomy of lifetime warranty policies is developed which includes eight different one dimensional and two dimensional lifetime warranty policies and are grouped into three major categories, A. Free rectification lifetime warranty policies (FRLTW), B. Cost Sharing Lifetime Warranty policies (CSLTW), and C. Trade in policies (TLTW). Mathematical models for predicting failures and expected costs for different one dimensional lifetime warranty policies are developed at system level and analysed by capturing the uncertainties of lifetime coverage period and the uncertainties of rectification costs over the lifetime. Failures and costs are modelled using stochastic techniques. These are illustrated by numerical examples for estimating costs to manufacturer and buyers. Various rectification policies were proposed and analysed over the lifetime. Manufacturer's and buyer's risk attitude towards a lifetime warranty price are modelled based on the assumption of time dependent failure intensity, constant repair costs and concave utility function through the use of the manufacturer's utility function for profit and the buyer's utility function for cost. Sensitivity of the optimal warranty prices are analysed with numerical examples with respect to the factors such as the buyer's and the manufacturer/dealer's risk preferences, buyer's anticipated and manufacturer's estimated product failure intensity, the buyer's loyalty to the original manufacturer/dealer in repairing failed product and the buyer's repair costs for unwarranted products. Three new service contract policies and cost models for those policies are developed considering both corrective maintenance and planned preventive maintenance as the servicing strategies during the contract period. Finally, a case study is presented for estimating the costs of outsourcing maintenance of rails through service contracts. Rail failure/break data were collected from the Swedish rail and analysed for predicting failures. Models developed in this research can be used for managerial decisions in purchasing life time warranty policies and long term service contracts or outsourcing maintenance. This thesis concludes with a brief summary of the contributions that it makes to this field and suggestions and recommendations for future research for lifetime warranties and service contracts.

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