619 resultados para warranty fraud


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Työn tavoitteena on selventää takuun yleisiä periaatteita ja esittää lukijalle kattavasti erilaiset takuumallit ja -politiikat. Tavoitteena on, että lukija ymmärtää takuun osana isompaa kokonaisuutta ja kuinka takuuta voidaan käyttää markkinoinnin keinona. Työssä tuodaan esille myös takuuaikaisten petosten ominaispiirteitä, sekä pohditaan takuuaikaisten petosten aiheuttamia kustannuksia. Työ on kirjallisuuskatsaus, joka on laadittu pääosin takuuta ja takuukustannuksia käsittelevän kirjallisuuden sekä aiheeseen liittyvien tieteellisten artikkeleiden pohjalta. Petoksista on hyvin vähän löydettävissä tieteellisiä julkaisuja, joten petosten ja niiden kustannusten käsittely pohjautuu pääasiassa uutisiin ja erilaisiin aihetta käsitteleviin ammatillisiin internetlähteisiin. Tuloksena voidaan todeta takuun ja takuukustannusten olevan hyvin monipuolinen ja haastava kokonaisuus. Yrityksille onkin tärkeää hallita tuotteidensa takuita ja tarkkailla niistä aiheutuneita kustannuksia. Toisaalta yrityksille avautuu takuun kautta loistavia mahdollisuuksia parantaa myyntiään, jos takuuta saadaan käytettyä markkinoinnissa apuna. Takuun ja hinnan optimointi on monimutkaisista malleista johtuen haastavaa, mutta toisaalta niillä voidaan saavuttaa merkittävää kilpailuetua kilpailijoihin nähden. Takuukustannusten ymmärtäminen ja hallitseminen vaatii paljon resursseja ja matemaattisten mallien käyttö on haastavaa ja siksi yritysten täytyy tehdä kompromisseja resurssien käytön suhteen. Lisäksi petosten todettiin aiheuttavan vuosittain merkittävästi kustannuksia valmistajille. Joidenkin lähteiden mukaan jopa 10–15% takuukustannuksista on petoksellisesti aiheutettuja.

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When repairable items sold under warranty fail, the rectification action taken by the manufacturer can be either a repair or a replacement, In this paper a new repair-replacement strategy is proposed for the manufacturer when the items are sold with a non-renewing free replacement warranty policy. The strategy involves splitting the warranty period into two intervals where only repairs are carried out, separated by a third interval with at most one replacement.

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For products sold with warranty, preventive maintenance actions by manufacturers and/or buyers have an impact on the total costs for both parties. This paper develops a framework to study preventive maintenance actions when items are sold under warranty and reviews the models that have appeared in the literature. It then develops a new model and carries out its analysis.

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Warranty is an important element of marketing new products as better warranty signals higher product quality and provides greater assurance to customers. Servicing warranty involves additional costs to the manufacturer and this cost depends on product reliability and warranty terms. Product reliability is influenced by the decisions made during the design and manufacturing of the product. As such warranty is very important in the context of new products. Product warranty has received the attention of researchers from many different disciplines and the literature on warranties is vast. This paper carries out a review of the literature that has appeared in the last ten years. It highlights issues of interest to manufacturers in the context of managing new products from an overall business perspective. (C) 2002 Elsevier Science B.V. All rights reserved.

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When products are sold under warranty, the manufacturer incurs additional costs for warranty servicing. Preventive maintenance actions can be used to reduce this cost and these are worthwhile only if the extra cost incurred is less than the reduction achieved. In this paper we propose a new preventive maintenance policy where the parameters are selected optimally to minimize the total warranty servicing cost.

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Chen and Popova [Res. Engng Syst. Saf. 77 (2002) 61] discuss maintenance policies for items sold with a two-dimensional warranty. However, their paper fails to give a proper review of the literature and it also contains errors. In this note we first review the relevant literature and then comment on the errors in their analysis. (C) 2003 Elsevier Ltd. All rights reserved.

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For products sold with warranty, the warranty servicing cost can be reduced by improving product reliability through a development process. However, this increases the unit manufacturing cost. Optimal development must achieve a trade-off between these two costs. The outcome of the development process is uncertain and needs to be taken into account in the determination of the optimal development effort. The paper develops a model where this uncertainty is taken into account. (C) 2003 Elsevier Ltd. All rights reserved.

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For repairable items sold with free replacement warranty, the actions available to the manufacturer to rectify failures under warranty are to (1) repair the failed item or (2) replace it with a new one. A proper repair-replace strategy can reduce the expected cost of servicing the warranty. In this paper, we study repair-replace strategies for items sold with a two-dimensional free replacement warranty. (C) 2003 Elsevier Ltd. All rights reserved.