필요조건분석(NCA)의 이해와 공급사슬 및 생산운영관리 분야에의 활용

최강화(Kanghwa Choi) 한국SCM학회 2024 한국SCM학회지 Vol.24 No.1

Recently, there has been a noteworthy surge in the adoption of the Necessary Condition Analysis (NCA) methodology across various social science research domains. Specifically, this emerging data science technique has gained attention in previous international studies concentrating on supply chain and production and operations management. Nevertheless, its application in Korean research domains remains limited, with only a few studies employing the NCA methodology. Therefore, this study introduces the theoretical underpinnings of the NCA methodology, as introduced by Yan Dul in 2016, along with its analytical procedure and application in the fields of supply chain management and operations management. We discuss the feasibility and potential application of the NCA methodology in Korean research concerning supply chain management.

연체채권 재고와 회수 콜 비용 간의 동태적 체인구조 연구

최강화(Kanghwa Choi) 한국SCM학회 2018 한국SCM학회지 Vol.18 No.2

This study is to analyze the correlation between the debt collection rate and the collection center’s call-related cost by adjusting the call intensity. Furthermore, this paper explored the equilibrium point of call intensity considering credit risk, credit loss and transactional relationships with creditor in the debt collection center, using a cascade/aging chain model in delinquent debt collection dynamics. To collect and retrieve the delinquent debts in consumer financial practices, it is more important to increase the right party contact rates with delinquent debt customers. Accordingly, strengthening call intensity to increase customer contact rate leads to the cost explosion and the customer`s outflow from credit cycle. Thus, delinquency debt management is seeking for a balance between credit costs versus customer relationships.

벤처기업과 기술혁신형 중소기업의 인증평가 지표에 대한 비교연구

최강화 ( Kang Hwa Choi ),유연우 ( Yen Woo You ) 한국생산성학회 2012 生産性論集 Vol.26 No.1

The purposes of this study are to find a validity of authentication index between venture company and innovative SMEs and to confirm the accuracy of authentication procedure and related authentication index. For this purpose, discriminant analysis is used to determine which variables discriminate between venture company and innovative SMEs. The results show that common factors of each SMEs have the representatives of characteristic of venture and Inno-biz, but almost other factors don`t distinguish the discrepancy between venture and Inno-biz. That is, the existing process to certify venture and Inno-biz is not effective for selecting each SMEs with sufficient innovation capability. So these authentication index should be reset and integrated to highlight the effectiveness and efficiency of authentication index between venture company and innovative SMEs. Our findings indicates that the concept of venture and Inno-biz SMEs should be clarify to differentiate the effectiveness of government`s small business corporation policy, which suggests that authentication index between venture company and innovative SMEs should be adjusted on the basis of more careful selection and focus perspectives.

동적시뮬레이션을 이용한 글로벌 공급체인에서의 제품차별화 지연생산

최강화(Kang Hwa Choi),정창용(Chang Yong Jung),김수욱(Soc Wook Kim) 한국경영학회 2007 經營學硏究 Vol.36 No.2

모바일 생태계의 수익공유에 의한 작용과 반작용의 인과구조

최강화(Kang-hwa Choi) 한국SCM학회 2014 한국SCM학회지 Vol.14 No.2

‘Hyperconnectivity’and ‘supercooperation’among partners of mobile value chain are the crucial factor for the sustainable growth of a mobile ecosystem. This study analyzes the complex and entangled feedback mechanisms of CPND and cooperation among all partners in the mobile value chain through the revenue sharing to provide strategic policies to strengthen and foster sustainability of mobile ecosystems. This study drew on strategic variables using a causal loop diagram to achieve more effective revenue sharing among partners of mobile ecosystem. Furthermore, as the virtuous cycle structure of a mobile ecosystem can have unintended impact onto counterpart through revenue sharing, this study analyzed the conversion factors that can change from a virtuous to a vicious cycle using the accidental adversary archetype. Thus, we suggest the crucial factor causing a virtuous to a vicious cycle, and recommend strategic policy to prevent such a vicious cycle in advance.

카지노 산업의 정태적 효율성과 동태적 생산성 비교

최강화(Kang-hwa, Choi) 한국관광레저학회 2016 관광레저연구 Vol.28 No.9

메타프론티어 분석을 이용한 지역 축제의 효율성 비교

최강화(Choi, Kang-Hwa) 대한관광경영학회 2016 觀光硏究 Vol.31 No.6

본 연구는 2014년의 국내에서 개최된 지역 문화관광 축제를 대상으로 상대적 효율성을 측정하였다. 기존의 지역 축제 효율성을 분석한 연구들은 축제등급이나 축제종류 등과 같은 지역 축제의 특성을 반영하지 못하고, 전체 지역 축제를 대상으로 효율성을 분석한 한계를 가지고 있다. 개별 지역 축제들은 개최 목적, 축제유형, 축제등급 등 여러 가지 측면에서 서로 상이한 운영방식을 가지고 있다. 따라서 서로 이질적인 특성을 가진 지역 축제들을 하나의 모집단으로 가정하고 분석한 것은 상대적 효율성 분석의 정확성과 해석상의 오류를 가져 오기도 한다. 따라서 본 연구에서는 각 지역 축제가 가지고 있는 지역 축제의 축제등급 또는 축제종류 별로 축제의 특성을 반영한 메타프론티어를 분석하였다. 분석 결과에 의하면, 첫째, 일부 지역 축제를 제외한 상당수의 지역 축제들의 메타 효율성은 낮게 분석되었다. 따라서 축제등 급이나 종류별로 효율성이 낮은 지역 축제들에 대해서는 과감한 구고조정과 더불어 효율성 증진을 위한 정책적 대안 모색이 필요하다. 둘째, 지역 축제의 분류 기준에 따라서 서로 상이한 그룹 효율성 값을 보이고 있다. 따라서 향후 추가분석에서는 지역 문화관광 축제의 특색을 반영한 그룹 단위의 분석이 수행되어야 함을 제시하고 있다. The paper measured a comparative efficiency of domestic regional festivals in 2014. Most of previous studies investigated the efficiency, including all regional festivals as decision making units. However, this results had limitations on measuring the efficiency without considering the distinctive characteristics of regional festivals such as festival grade and festival type. In general, regional festivals have its own specific operation system, followed by the festival grade and festival type. This paper, therefore, employed a Meta-Frontier analysis to reflect the characteristics of regional festivals into DEA model, categorized by festival grade and festival type. First, the results of Meta-frontier show that most of regional festivals have a comparatively low efficiency score, except only a small efficient regional festivals. Thus, it requires to carry out a large-scale restructuring for low efficient regional festivals, and needs a strategic policies to enhance the efficiency of regional festivals. Second, the group efficiency of regional festival have a different score, depending on a classification criteria of regional festival. Therefore, a DEA technique for measuring efficiency of regional festival have to incorporate the DMUs considering the unique characteristics of regional festival.

택배네트워크의 운영효율성 증진을 위한 시스템 사고

최강화 ( Kang Hwa Choi ) 한국시스템다이내믹스학회 2011 한국시스템다이내믹스 연구 Vol.12 No.1

With steady increase in the demand for door-to-door delivery services, courier service providers are facing a constant pressure to reduce delivery price in order to secure quantity order and to improve the efficiency and reliability for customer service. The objective of this research is to explain the structure of the door-to-door delivery including door-to-door delivery service demand, sorting capacity in the hub-terminal, and the system performance measures such as service reliability networks using causal loop diagram(CLD). Based on causal relation, this research describes a comprehensive approach to examine how capacity reliability contributes to the renewal of the firm`s competences through its reciprocal relationship with travel time reliability and connectivity reliability. Also, this research suggests the policy alternatives to improve effectiveness and efficiency of door-to-door delivery network in response to increase customer satisfaction and profit maximization of the courier service providers: operational, tactical, and strategic levels.

코로나 발생 전후 시기의 언어 네트워크를 활용한 제노포비아에 대한 연구동향 분석

최강화(Choi Kanghwa) 이주사학회 2022 Homo Migrans Vol.26 No.-

본 연구에서는 코로나 발생 이전에 외국인 혐오를 다루었던 기존의 연구들과 코로나 발생 이후에 외국인 혐오 현상을 연구한 기존의 연구 문헌들을 상호비교하면서 연구의 동향이나 추이가 어떻게 변화되어가고 있는가를 분석하기 위해 키워드 기반의 언어 네트워크 분석을 실시하였다. 이를 위해 본 연구에서는 텍스트마이닝과 네트워크 분석의 CONCOR 분석을 실시하였으며, 코로나 발생 이전과 이후 기간 동안 연구주제의 네트워크 구조가 어떤 상관관계가 있는지를 통계적으로 검증하기 위하여 대표적인 언어 네트워크 분석의 통계적 검정방법인 QAP 상관분석을 실시하였다. 분석 결과에 의하면, 코로나 발생 이전에는 외국인, 학생, 한국, 다문화, 교육 등과 같은 단어의 중심성이 높은 반면, 코로나 발생 이후에는 혐오, 발언, 차별 등과 같은 부정적 의미의 단어들의 중심성이 높게 나타나고 있다. CONCOR 분석 결과에 의하면, 코로나 발생 이전이나 이후에 모두 네 개의 그룹으로 단어 클러스터가 생성되었고, 특히, 코로나 발생 이후 에는 제노포비아와 관련한 언어적 표현이 더 많아지고 다양해지고 있다. 또한 QAP 상관분석 결과에 의하면, 코로나 발생 이전과 이후에 네트워크 구조들 간의 유의한 상관성이 존재하나, 상관관계가 매우 낮게 나타나고 있어 두 기간에 수행되었던 기존의 연구들 간의 상관성이 있다고 판단하기는 다소 어려움이 있는 것으로 분석되었다. This study conducted keyword-based language network analysis to analyze how the research trends related to the xenophobia are changing before and after COVID-19 pandemic. Moreover, this study employed the CONCOR procedure based on text mining technique to categorize sets of actors with similar status and illustrate the relation among the social network groups. We also deal with the QAP correlation analysis to statistically test for the significance of association between the network structure of research topics related to the xenophobia before and after coronavirus outbreak. The results of sementic network analysis demonstrated that words such as ‘foreigners’, ‘students’, ‘Korea’, ‘multiculturalism’, and ‘education’ were highly frequent before the outbreak of COVID-19, while words with negative meanings such as ‘hatred’, ‘speech’, and ‘discrimination’ were highly centralized after COVID-19. According to the results of the CONCOR analysis, word clusters were divided into four groups before or after the coronavirus outbreak, with linguistic expressions connected to xenophobia rising and diversifying after the coronavirus outbreak. Furthermore, while the QAP correlation analysis reveals a significant correlation between network structures before and after the coronavirus outbreak, the correlation coefficient is relatively low, making it difficult to determine whether there is a correlation between previous xenophobia-related studies analyzed between T₁(2018-2019) and T₂(2020-2021) research periods.

학술연구 : 연구개발투자와 특허경영의 인과구조

최강화 ( Kang Hwa Choi ),유연우 ( Yen Yoo You ),김수욱 ( Soo Wook Kim ) 한국중소기업학회 2010 中小企業硏究 Vol.32 No.3