동적 이벤트를 고려한 수주생산환경의 계층적 생산계획 및 통제 시스템

장길상,김재균,Jang, Gil-Sang,Kim, Jae-Gyun 대한산업공학회 2001 산업공학 Vol.14 No.1

Production planning and control system plays an important role in manufacturing companies because it determines all production capacity planning, material procurement planning, and production scheduling which are needed in the process of producing products. Many researches on production planning and control system have been conducted for many manufacturing companies for recent decade. But, a considerable research achievement has mainly been obtained on the forecast-driven production for a make-to-stock and an assemble-to-order. The reason is that there are some hardships such as difficulties of standardizing product information, the frequent changes of design and material, and the unexpected dynamic events that influence the production of customer's order in a make-to-order or an engineering-to-order environments. By these characteristics and their complexities, some studies for production planning and control system in a make-to-order environment are presented recently. In this paper, we present the framework of the hietachical production planning and control for a make-to-order environment with dynamic events. In order to illustrate the usefulness of the proposed framework for a hietachical production planning and control, the information system for a make-to-order production was implemented with the object of the company of producing electricity transformer.

메타 데이터 기반의 기업용 애플리케이션 구축 방안에 관한 연구

장길상(Gil-Sang Jang) 한국컴퓨터정보학회 2009 韓國컴퓨터情報學會論文誌 Vol.14 No.9

일반적으로, 기업에 요구되는 정보시스템의 개발사이클은 시스템 계획 및 선정, 시스템 분석, 시스템 설계, 시스템 구현 및 운영의 4단계로 이루어진다. 이런 절차에 따라 한번 개발되고 도입된 정보시스템들은 잦은 업무환경의 변화 및 그에 따른 빈번한 업무프로세스의 변경 등으로 시스템의 개발과정에서 뿐만 아니라 유지보수 단계에서도 애플리케이션의 추가적인 개발 및 수정 요구 등을 지원하기 위하여 많은 노력과 비용이 요구되고 있다. 특히, 개발과정 중에는 정확한 사용자 요구사항 파악의 어려움 및 잦은 요구사항 변경 등으로 인한 시스템 설계의 빈번한 변경과 그에 따른 프로그램 개발의 어려움으로 인하여 시스템 설계와 구현 사이에 항상 불일치가 발생하게 되고, 더 나아가서 시스템 개발의 표준화 정립이 어려운 실정이었다. 본 논문에서는 이러한 시스템 설계와 구현 사이의 불일치를 줄이고, 신속한 응용프로그램의 개발 및 기존의 한번 개발되어지면 폐기 때까지 사용하여야 하는 기존 개발방식의 한계를 극복하기 위하여, 메타 데이터 기반의 애플리케이션 개발 방안을 제시하고, 이를 위하여 메타 데이터를 체계적으로 관리 위한 리파지토리 시스템의 프레임워크를 제시한다. 본 논문에서 제시된 메타 데이터 기반의 애플리케이션 구축 방안은 시스템 분석 및 설계 단계에서 발생되는 산출물 정보를 메타 데이터화하고, 이것을 기반으로 한 리파지토리 시스템을 구축 활용함으로써 애플리케이션의 개발 및 고객화를 용이하게 하는 개념이다. 본 논문에서 제시한 메타 데이터 기반의 애플리케이션 구축 방안의 적용가능성을 보여주기 위하여, 'H' 자동차부품업체의 ERP 시스템 구축에 적용되어졌다. 그 결과, 기존의 코딩 기반 개발 방식보다 제시된 메타 데이터 기반개발방식이 개발 용이성, 개발 생산성, 유지보수 용이성, 프로그램 구성요소들의 재사용성 등 여러 측면에서 향상되었다. Generally, the phases of constructing information systems are consisted of systems planning and selection, system analysis, system design, and system implementation and operation. These systems require many efforts and costs for additional development of modification requirements due to a frequent changes of business environments and business processes. Especially, inconsistencies between system design and system implementation usually happen during development steps because of the difficulties of program developments due to difficulties of capturing exact user requirements and frequent changes of user requirements. This paper proposes a scheme of implementing meta-data based applications for enterprises in order to reduce inconsistencies between system design and system implementation and to overcome limits of the existing coding-based development methods of applications which must use until disuse if they are developed once. Also, this paper presents a framework of repository system to systematically manage and utilize meta-data. The core concept of the proposed scheme makes outputs generated in the phases of system analysis and design into meta-data and is to easily develop and customize application programs using meta-data repository. Also, to show the applicability of the proposed scheme, it is applied to implement ERP system of 'H' automotive part manufacturer. As a result, the proposed scheme can gain improvements such as easiness and productivity of program development, easiness of maintenance, reusability of program components, etc.

자동차부품 제조업체를 위한 EXCEL 기반의 BOM 관리시스템 구현

장길상(Gil-Sang Jang),김재도(Jae-Do Kim),박창권(Chang-Kwon Park) 한국산업경영시스템학회 2005 한국산업경영시스템학회지 Vol.28 No.4

This paper focuses on a BOM(Bill of Materials) management problem for a small and medium manufacturing company that produce automobile parts. Automobile part's manufacturers produce various products due to various automobile characteristics such as types, colors, and the other options of car. These products are classified into product groups with common parts. And each product group is regarded as a product family. This paper proposes an efficient and effective EXCEL-based BOM management scheme using characteristics of the product family. And we have implemented the practical EXCEL-based BOM management system for real small and medium automobile part's manufacturing companies.

업무혁신에 대한 조직적 상황과 ERP시스템의 확장이용의도 간의 관계에 영향을 미치는 요인에 관한 연구

장길상 ( Gil Sang Jang ),송정수 ( Jung Su Song ) 한국정보시스템학회 2012 情報시스템硏究 Vol.21 No.1

The purpose of this study is twofold: first, to identify the factors affecting the relationships between the organizational context for work innovation(organizational citizenship behaviors, IS innovation resistance, and user IT capability) and the intention of ERP extension usage, and second, to examine the mediating effect of the ERP performance on the relationships between the ERP adaptation and the intention of ERP extension usage. In order to achieve the goals of this study, data were obtained from 304 members of the seven organizations such as manufacturers, distributors and service industries, and were analyzed by using SPSS 12.0 and AMOS 5.0. The study results are as follows. There were positive effects of the organizational citizenship behaviors and the user IT capability on the change management activity. The IS innovation resistance had a negative effects on the change management activity. The change management activity had a positive effect on the ERP adaptation. The ERP adaptation had a positive effect on the ERP performance and the intention of ERP extension usage. The ERP performance had a positive effect on the intention of ERP extension usage. In addition, there was a partial mediating effect of the ERP performance on the relationships between ERP adaptation and intention of ERP extension usage. Based on these findings, the implications and limitations of the study were presented including some directions for future studies.

SCM 성공요인이 프로세스 혁신과 경영성과에 미치는 영향

장길상(Gil-Sang Jang),문성일(Sung-Il Moon),송정수(Jung-Su Song) 한국SCM학회 2015 한국SCM학회지 Vol.15 No.1

This study is an empirical study on the relationships among success factors of SCM(information management, organizational support, partnership), process innovation, and business performance. In particular, the mediating effect of process innovation on the relationship between success factors of SCM and business performance is empirically analysed to find causes and impacts among these variables. In order to achieve the goals of this study, research models were proposed, and hypothesis were drawn and tested on the basis of previous studies. The proposed research model is that success factors of SCM have effects on business performance and process innovation has mediating effects on this process. A survey was conducted on the employees working in manufacturing companies which are applying SCM at Ulsan city. The survey questionnaires were sent to 300 people and 206 of them were returned. Data obtained was analyzed with SPSS 18.0. The study results are as follows: First, there were positive relationships between critical success factors of SCM(information management, organizational support, partnership) and process innovation. Second, there was also a positive relationship between process innovation and business performance. Third, there were also positive relationships between critical success factors of SCM(information management, organizational support, partnership) and business performance. Finally, process innovation had partial mediating effects on the relationship between critical success factors of SCM(information management, organizational support, partnership) and business performance.

대규모 제조업에서의 통합 VOC 관리 방안 및 시스템 구축

장길상(Gil-Sang Jang) 한국컴퓨터정보학회 2009 韓國컴퓨터情報學會論文誌 Vol.14 No.8

고객의 소리(VOC: Voice of the Customer)는 기업 및 다양한 조직들에서 고객의 요구사항들을 획득하는 과정을 기술하기 위해서 경영 및 정보기술에서 사용되는 용어이다. 최근, 기업들은 고객 만족을 위하여 VOC를 처리하고, 저장/분석하여, 문제의 재발 방지 및 개선 활동, 제품 및 서비스의 기획 및 개발에 활용하려는 노력을 하고 있다. 지금까지, 이러한 VOC 관리 시스템은 호텔업 및 보험/금융업 등의 서비스 산업들을 위주로 도입되어 왔다. 본 논문에서는 대규모 제조업을 대상으로 다양한 채널로 들어오는 VOC의 통합 관리 방안을 제시하고, 제시된 방안을 기반으로 한 통합 VOC 관리 시스템의 구축 사례를 기술한다. 이러한 통합 VOC 관리시스템을 구축함으로써, VOC를 기업의 중요한 지식 자산으로 저장하고 활용할 수 있게 되었다. Voice of the customer(VOC) is a term used in business and information technology(IT) to describe the process of capturing a customer's requirements in enterprises or various organizations. Recently, in order to satisfy customer's needs, enterprises try to utilize VOC at recurrence prevention of problems and their improvement activities, planning and development of product/service by processing, storing, and analyzing VOC. Until now, VOC management systems are introduced around service industries such as hotel business and insurance/financial business, etc. This paper proposes an integrated management scheme of VOC which are captured by various communication channels and describes a case of implementing an integrated VOC management system on the basis of the proposed scheme for the large-scale manufacturing company. By the implemented system, VOC are stored and utilized as the important knowledge assets of enterprises.

자동차부품산업에서 공급사슬경영을 위한 공금자 선정 ? 관리 및 주문량 배분에 관한 연구

장길상(Gil-Sang Jang),김재균(Jae-Kyun Kim) 한국산업경영시스템학회 2009 한국산업경영시스템학회지 Vol.32 No.3

The supplier selection problem is perhaps the most important component of the purchasing function. Some of the common and influential criteria in the selection of a supplier include quality, price, delivery, and service. These evaluation criteria often conflict, however, and it is frequently impossible to find a supplier that excels in all areas. In addition, some of the criteria are quantitative and some are qualitative. Thus, a methodology is needed that can capture both subjective and objective evaluation measures. The Analytic Hierarchy Process(AHP) is a decision-making method for ranking alternative courses of action when multiple criteria must be considered. This paper proposes the AHP-based approach which can structure the supplier selection process and the achievements-based procedure which can allocate order quantities for the selected suppliers in automotive part manufacturers. Also, Through the practical case of 'D' automotive part manufacturing company, we shows that the proposed AHP based supplier selection approach and the achievements-based allocation procedure of order quantity can be successfully applied for supplier selection and order quantity allocation problems.

능동형 서비스 수준 계약의 표현

김상락(Sang-Rak Kim),이광일(Gwang-Il Lee),배재학(Jae-Hak J. Bae),장길상(Gil-Sang Jang) 한국정보과학회 2011 한국정보과학회 학술발표논문집 Vol.38 No.1B

최근 기업들이 SOA, 웹 서비스, 유틸리티 컴퓨팅, 클라우드 컴퓨팅 등과 같은 서비스 지향적인 컴퓨팅 환경에 관심을 가지면서 SLA(Service Level Agreement) 기반의 자동화된 계약관리를 원하고 있다. 일반적으로 SLA는 종이에 자연언어로 표현되어 있어서 SLA 관리나 SLA 기반의 정보처리의 자동화가 제한된다. 이에 본 논문에서는 문서형 SLA를 실행가능한 언어로 표현하는 방법을 제안한다. 그 방법의 핵심은 SLA 문장을 단문, 중문, 또는 복문 형식으로 재구성하고 각 문장을 술어논리로 표현한 뒤, 이를 Prolog 기반 프로그램으로 변환하여 실행가능한 SLA(Active SLA)를 얻는다는 것이다. 이와 함께 ASLA를 활용한 SLA 기반의 계약관리 업무의 자동화에 대한 구체적인 예도 볼 것이다.

SLA 구현방법 비교: ASLM과 SLA@SOI

김상락 ( Sang-rak Kim ),양재군 ( Jae-gun Yang ),배재학 ( Jae-hak J Bae ),장길상 ( Gil-sang Jang ) 한국정보처리학회 2011 한국정보처리학회 학술대회논문집 Vol.18 No.1

최근 클라우드 컴퓨팅 기반의 IT 서비스가 증가하면서 기업들 사이에 SLA가 중요한 화두로 대두되고 있다. 상업용 SLA 관리 툴들은 어플리케이션 또는 데이터베이스 계층에 계약관련 로직을 내장하고 있다. SLA 규칙들이 구현 로직 내에 암시적으로 표현되어 있어서 유지보수가 어렵고 계약사항을 공유하는 데 많은 어려움이 따른다. 따라서 오늘날과 같은 서비스 지향 아키텍처, 온 디맨드, 유틸리티컴퓨팅, 클라우드 컴퓨팅 환경에서는 전체 서비스를 자동 관리할 수 있는 기술에 대한 연구가 반드시 필요하다. 본 논문에서는 능동문서기반의 ASLM(Active Service Level Management)과 유럽에서 진행 중인 SLA@SOI 프로젝트의 계약서 작성 및 실행에 대한 구현 방법을 비교하였다. 비교결과 유지보수성과 자동화 측면을 고려할 때 계약 규칙 로직을 어플리케이션 로직과 분리한 ASLM의 구현방법이 SLA@SOI 보다 SLA 계약처리 업무에 적합함을 알 수 있었다.

SVM 알고리즘을 활용한 선루프 실러도포 공정 품질검사 시스템 구축

양희종,장길상,Yang, Hee-Jong,Jang, Gil-Sang 대한안전경영과학회 2021 대한안전경영과학회지 Vol.23 No.3

Recently, due to the aging of workers and the weakening of the labor base in the automobile industry, research on quality inspection methods through ICT(Information and Communication Technology) convergence is being actively conducted. A lot of research has already been done on the development of an automated system for quality inspection in the manufacturing process using image processing. However, there is a limit to detecting defects occurring in the automotive sunroof sealer application process, which is the subject of this study, only by image processing using a general camera. To solve this problem, this paper proposes a system construction method that collects image information using a infrared thermal imaging camera for the sunroof sealer application process and detects possible product defects based on the SVM(Support Vector Machine) algorithm. The proposed system construction method was actually tested and applied to auto parts makers equipped with the sunroof sealer application process, and as a result, the superiority, reliability, and field applicability of the proposed method were proven.