• Journal of Korean Society for Quality Management
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• v.24 no.1
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• pp.1-9
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• 1996

Ritchken(1985) analyzes free replacement and pro-rata warranty policies for products receiving renewable warranies. He shows that for constant failure rates pro-rata warranty policies are more attractive to risk-averse manufacturers than shorter term free replacement policies that result in the same average warranty cost. This paper considers the case when product lifetimes distributions are of phase-type. When this is so, Ritchken's performance measures can be simplified considerably. It is found, that irrespective of the pattern of failure rates, pro-rata warranty policies are preferable to free replacement policies. But the warranty period of the equivalent free replacement policy decreases and then increases, as product reliability(the average time between failures) increases.

• Proceedings of the Korean Institute Of Construction Engineering and Management
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• 2007.11a
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• pp.687-690
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• 2007

This study is a basic research on looking onto bringing performance warranty contract into the country, to consider the usage in architecture which it is usually used on road pavement in developed countries. The study will also apply performance warranty contracts on public private partnerships through examination and analysis of various matters which will lead to globalization of the korean architecture industry, the increase of quality of result, better convenience for the orderer, the decrease of cost, and the acceleration on research for technical development.

• Journal of Korean Institute of Industrial Engineers
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• v.27 no.4
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• pp.366-373
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• 2001

Economic component screening procedures for multi-component assembly products supplied with warranty are proposed. It is assumed that the screening variable is continuous and the performance variable is dichotomous. Logistic and normal models are considered; the proportion of conforming items is a logistic function of the screening variable in the logistic model and the screening variable given the performance variable is normally distributed in the normal model. Cost models are constructed which involve three cost components; screening inspection cost for each component, cost due to disposing a rejected component, and warranty cost for an assembly product. Methods of finding the optimal screening procedures are presented and numerical examples are given.

• Proceedings of the Korean Reliability Society Conference
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• 2004.04a
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• pp.97-106
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• 2004

Contractual agreement (relating to product performance). Established on sale of product. Requires the manufacturer to either rectify failures occurring over the warranty period or compensate through refunding a fraction of the sale price.(omitted)

• Proceedings of the Korean Institute of Building Construction Conference
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• 2008.05a
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• pp.153-157
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• 2008

The construction market has gradually become complexity, variety and specialization, and then owner's requirements about quality has become various. In order to solve the problem such as stated above, advanced constructions in United Kingdom, Japan and United States have introduced warranty contract which is warranted to quality and performance for need of owner in determined term to ensure the quality of construction since 1960s. However, the interior of a country encounter another problem result from defects liability what indefiniteness of defects standard, excess responsibility period, social recognition of be identical fraudulent work and defects, and contract with ascendancy of owners. etc, so builders concerned more excess defects liability than the quality of construction. The purpose of this study is to analysis of warranty contract in order to solve the problem such as stated above.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2007.04a
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• pp.89-92
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• 2007

Since 1960s, advanced constructions have introduced warranty contract which is warranted to quality and performance for need of owner in determined term to ensure the quality of construction. However, the interior of a country encounter another problem result from Defects Liability what indefiniteness of defects standard, excess responsibility period, social recognition of be identical fraudulent work and defects, and contract with ascendancy of owners. etc, so builders concerned more excess defects liability than the quality of construction. The purpose of this study is to analysis of warranty contract in order to solve the problem such as stated above.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.66
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• pp.95-118
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• 2015

This study examines the Buyer's Remedies in respect of Defects in Title under SGA. As SGA divides contractual terms into a condition and a warranty, its effects regarding a breach of a condition or a warranty are different. Where a stipulation in a contract of sale is a condition, its breach may give rise to a right to treat the contract as repudiated and to claim damages. Where there is a breach of a warranty in a contract of sale, the aggrieved party may have a right to claim damages. Regarding a breach of a condition under SGA s 12(1), although the buyer may have his right to terminate the contract, he may lose that right when he accept or is deemed to have accept the goods by intimating his acceptance to the seller, acting inconsistently with the ownership of the seller, or retaining the goods beyond a reasonable time without rejecting them. Furthermore, the buyer may claim the estimated loss directly and naturally resulting from seller's breach. SGA contains the principle of full compensation and so the suffered loss and the loss of profit are compensable. As to specific performance under SGA, the court has been empowered to make an order of specific performance to deliver the goods in conformity with the terms of the contract and so it is not a buyer's right. This order should be made only where the goods to be delivered are specific or ascertained goods and the court must think fit to grant the order. However, among these remedies, the buyer cannot have the right to terminate the contract where there is a breach of warranty by the seller under SGA s 12(2).

• Journal of the Korean Operations Research and Management Science Society
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• v.22 no.1
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• pp.87-99
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• 1997

This paper considers warranty servicing for repairable products when product lifetimes are phase-type(PH) distributions. Two replace-repair strategies are analyzed based on renwal processes. The quantities of interest can be expressed in terms of the renewal function which, in general, is very difficult to evaluate. By exploiting properties of PH distributions we obtain simplification to evaluate these performance measures. Numerical examples for four different PH distributions with typical functions are presented and the results are discussed.

• Journal of Korean Society for Quality Management
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• v.34 no.1
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• pp.40-47
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• 2006

Claim history data of rather long period were collected to assess reliability and warranty cost analyses. The data were appropriately organized to be used for further statistical analyses. For each critical component, nonparametric statistical method was applied to obtain reliability plot. Hazard plots of the components in a subsystem or system level were also obtained. Competing risk model was assumed to obtain the performance of the subsystem or system level.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2015.05a
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• pp.245-246
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• 2015

Cases of lawsuit and conflict are increasing because of defects in apartments in use after the completion of construction. Further, with changes in the consciousness of residents and in the social environment, many residents are showing interest in defect-related lawsuits. However, the term of warranty liability defined in the current law is not practically appropriate, and the verification of the determination of the term of warranty liability is insufficient. Against this background, this research aims to evaluate the appropriateness of defect repair periods by examining the actual defect condition of the finishing work among the various defects related to apartments. Collected performance data are analyzed by statistical techniques by considering the defect occurrence rate per construction type and the construction year of the finishing work in apartment construction. The analysis results will be used as basic data for evaluating the appropriateness of the standards for the term finishing works warranty liability.