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박민재,안현,김광훈 한국경영과학회 2014 한국경영과학회 학술대회논문집 Vol.2014 No.5
본 논문에서는 워크플로우 소셜네트워크 지식 발견 알고리즘에 대하여 기술한다. 워크플로우 모델과 모델의 실행을 기반으로 형성되는 업무 수행자들의 관계를 워크플로우 소셜네트워크라고 정의하고, 그 워크플로우 소셜네트워크의 지식을 발견하기 위한 알고리즘을 제안한다. 제안된 알고리즘은 워크플로우 내에 존재할 수 있는 소셜네트워크에 대한 지식 발견 알고리즘으로, 알고리즘을 통해, 워크플로우 수행자 중심적인 측면으로 바라보았을 때의 워크플로우가 어떠한 의미를 가질 수 있는지에 대한 지식을 발견해 낼 수 있고, 그에 대한 활용을 고려할 수 있다.
Cost Analysis on Warranty Policies Using Freund's Bivariate Exponential Distribution
박민재,김재영 한국품질경영학회 2014 품질경영학회지 Vol.42 No.1
Purpose: In this paper, the minimal repair-replacement warranty policy is used to carry out a warranty costanalysis with warranty servicing times and failure times that are statistically correlated to bivariatedistributions. Methods: Based on the developed approach by Park and Pham (2012a), we investigate the property of theFreund’s bivariate exponential distribution and obtain the number of warranty services using the field datato conduct the warranty cost analysis. Results: Maximum likelihood estimates are presented to estimate the parameters and the warranty modelis investigated using a Freund’s bivariate exponential distribution. A numerical example is discussed to dealwith the applicability of the developed approach in the paper. Conclusion: A novel approach of analyzing the warranty cost is proposed for a product in which failure timesand warranty servicing times are used simultaneously to investigate the eligibility of a warranty claim.
박민재,정기문,박동호 한국통계학회 2021 Journal of the Korean Statistical Society Vol.50 No.3
This paper proposes an optimal maintenance and warranty policy for the repairable second-hand product incorporating a periodic preventive maintenance strategy to slow down the deterioration of the product and derives an optimal length of non-renewing warranty period. Although a number of maintenance policies for the second-hand product have been discussed in the literature, there exist very few works dealing with the periodic preventive maintenance strategy under non-renewing warranty to obtain an optimal warranty period for the second-hand product. This work considers a non-renewing warranty policy, during which a periodic preventive maintenance is adopted to diminish the degradation process of the product and determines an optimal length of warranty period by optimizing the expected cost rate incurred to the dealer during the maintenance cycle. Since the replacement of the failed second-hand product may not be practical in general, we adopt a concept of full refund instead of replacement in this paper. By pre-setting a repair time threshold, either the refund or minimal repair is provided by the dealer depending on whether the failed second-hand product can be repaired within the repair time threshold or not. The maintenance cycle of the second-hand product starts with the purchase of the product and ends when either the refund occurs within the warranty period or the warranty expires. Given a certain cost structure charged to the dealer, we formulate the expected cost rate during the maintenance cycle of the product and determine an optimal length of warranty period minimizing the objective function. Assuming the power law process for the product’s failures and a Weibull distribution for the repair times, we present a numerical example and investigate the effects of periodic preventive maintenances and other relevant parameters on the optimal solution.
박민재 한국상사판례학회 2007 상사판례연구 Vol.20 No.4
<Abstract> A study on the hospital bankruptcy Park, Min-Je There will be a place of what kind of the problem which advances on the hospital bankruptcy process of the hospital and specially a reorganization process and it was studied. A case of the original hospital bankruptcy, on the general company bankruptcy a kind is different, because includes on the officials who is a patient needs a treatment, have the necessity which the method of reorganization a avoid of the insolvency․liquidation on the hospital which is possible, will select. Presently, it is insufficient from the bankruptcy laws. A case of the legislation method and construction method with it observes, interest of problem must be focused on it. A case of the hospital bankruptcy will occur from bankruptcy process to, there is a possibility where will be a various problem. Presently, on the bankruptcy law ①company reorganization process, relates in regulation of the bankruptcy proceeding and the interpretation method there is a necessity approach toward the new, ②the administrative service lead on medical service corporation principle, regarding service․accounts of the medical treatment corporation there is a necessity control which is appropriate. ③Presently, regarding the hospital․clinics which the non-medical service corporation is control, there is on the control outside of the relationship administrative it manages control right of the administration service which goes an influence upon medical law importance, ④which is complete management․management system of the hospital, fidelity of the laws system, ⑤in compliance with the cooperation of the relationship administrative service dispose of the hospital bankruptcy being controlled from the court of justice, it will be able to solve. After, regarding a field considerably to have the problem which is important.