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약국 서비스 품질 측정을 위한 SERVPERF 모형과 Non-Difference Score Model의 비교 분석
이상민(S M. Lee),홍정완(J W, Hong),권경희(K.H. Kwon),장우진(W J, Chang) 대한산업공학회 2008 대한산업공학회 추계학술대회논문집 Vol.2008 No.11
The competition factors are increasing both internally and externally after the new policy requiring Separation of Prescribing and Dispensing on 2000 in Korea. From these factor, domestic pharmacy market can not survive without understanding customers" changed needs. So, a new paradigm to satisfy customers" changed needs is required. This study uses SERVPERF and Non-Difference Score methods to measure the quality of the service which pharmacies provide. SERVPERF and Non-Difference Score model are used for the survey. Two methods are compared using Regression Analysis and LISREL analysis. The conclusion shows the factors which can influence the quality of the service and the correlation between the factors and the quality of the service. Also, a method is chosen to measure the quality of the service for the pharmacy more precisely. Analysis shows that SERVPERF is better than Non-Difference Score to measure the quality of the pharmacy service.
이동 통신망에서 영역 분할 방식을 이용한 페이지 비용 감소 방안
박노열,장인갑,홍정완,이창훈 한국경영과학회 2003 한국경영과학회 학술대회논문집 Vol.- No.1(1)
In personal communication systems, location management of mobile terminals is required to connect incoming calls to the mobile terminals. Investigation of effective location update and paging strategies is important to reduce the cost of location management. In this study, we propose a paging strategy considering the mobile terminals' residence patterns. The first paging area is introduced, which is characterized by the set of cells in the location area where mobile terminals usually stay for a significant period of time. We propose the decision criterion of the first paging area by comparing the cost against zone-based strategy. For an incoming call, we perform the sequential paging by the order of the first paging area and the rest of cells in the location area called by the second paging area. Thus the paging cost is greatly reduced, especially when the called mobile terminal is located in the first paging area. The proposed strategy is expected to be more effective than existing strategy using anchor cell in the location area because it reflects various residence patterns of mobile terminals.
홍정식,이해상,홍정완,이창훈,전경표 한국경영과학회 1990 한국경영과학회 학술대회논문집 Vol.- No.1
A conceptual mode of tentative packet handler subsystem (PHS) of TDX-10 is presented. This model is used analyze the capacity of PHS especially when packet bus (PBUS) is bottleneck. In the viewpoint of performance analysis, cyclic server system and token bus LAN are utilized in modeling PHS.
ATM 다중화 장치에 적용된 추계적 유체흐름 모형의 근사분석
윤영하,홍정식,홍정완,이창훈 한국경영과학회 1998 한국경영과학회지 Vol.23 No.4
In this paper. we propose a new approach to solve stochastic fluid flow models applied to the analysis of cell loss of an ATM multiplexer. Existing stochastic fluid flow models have been analyzed by using linear differential equations. In case of large state space. however. analyzing stochastic fluid flow model without numerical errors is not easy. To avoid this numerical errors and to analyze stochastic fluid flow model with large state space. we develope a new computational algorithm. Instead of solving differential equations directly. this approach uses iterative and numerical method without calculating eigenvalues. eigenvectors and boundary coefficients. As a result. approximate solutions and upper and lower bounds are obtained. This approach can be applied to stochastic fluid flow model having general Markov chain structure as well as to the superposition of heterogeneous ON-OFF sources. It can be extended to Markov process having non- exponential sojourn times.