본 연구는 Six Sigma 활동의 Tool인 Big Y 전개방법을 활용하여 기업의 핵심전략으로부터 과제를 도출하고 린 메뉴팩처링의 초기 활동인 Value Stream Mapping에 적용하여 기업의 핵심전략과 Value Stream Mapping에 포함되는 핵심 지표(Value Stream Mapping의 관심지표)와의 일치성을 확보해야 한다는 타당성을 제시하고, 이 방법론을 린 메뉴팩처링 활동 기업의 사례를 통해 그 효과성을 분석하고 시사점을 찾아 Six Sigma의 Big Y 전개와 린 메뉴팩처링 활동이 통합된 모델을 연구하고자 한다.
본 연구는 기업의 정보화 구축시 성과 중심의 구축으로 인한 시스템 효율의 저하와 시스템의 효율 저하로 의해 발생하는 비용 등을 린 시스템 적용으로 최적화하고 프로세스 접근의 한계성을 구축 사이클을 개선을 통해 기존의 정보시스템의 구축 방법에 비효율적 측면을 제거하고 효과적인 접근가능 모델을 제시하여 구축 방법을 향상 시키고자 한다.
본 연구에서는 생사시스템의 전체적인 방식인 린 시스템과 과학적인 문제절차를 지향하는 6시그마를 융합한 LEAN SYSTEM의 효과적인 통합을 통하여, 기업이 린 시그마시스템을 도입했을 때 가시화 될 수 있는 시너지 효과 및 효과적인 도입방안에 관하여 연구하고자 한다.
기업 주변 환경 및 기업 내부 환경에 맞춘 시스템의 도입에 있어 중요한 것은 도입 시기 및 도입 절차 그리고 도입 후 기업에 맞도록 개선해 나가는 그 기업만의 로드맵 창출이다. 따라서 기업 환경의 여러 가지 시스템을 총체적으로 관리하고 이끌어 나갈 하나의 잣대적인 역할을 할 시스템 도입이 필요한 데 본 연구에서는 LEAN SIGMA SYSTEM을 통하여 6시그마의 변화관리 체계와 문제해결 절차를 LEAN SYSTEM추진에 적용한 사례 연구 및 이론 연구를 바탕으로 도입 시 발생하는 시행착오를 최소화하여 기업의 혁신 실패 비용과 시간 낭비를 최소화하여 기업 운영에 있어 효과적인 조직 시스템 모델을 개발하고자 하는 것이 이 연구의 목적이다.
This paper deals with the problem of scheduling jobs and rate-modifying activities on parallel machines, motivated by a problem commonly found in the surface-mount technology of electronic assembly lines. A rate-modifying activity involving repair, maintenance and readjust is an activity that changes the production rate of equipment under consideration. In this paper, the processing time of a job scheduled before the activity is equal in each parallel machines. On the other hand, if the job is scheduled after the rate-modifying activity than the process time depends on the modifying rate of the activity. Our purpose is to schedule the rate-modifying activities and jobs to minimize the makespan on parallel machines which is NP-hard. We propose a branch and bound algorithm to solve medium size problems optimally. Also we develop three heuristics, Modified Longest Processing Time (MLPT), MULTIFIT and COMBINE algorithms to solve large size problems.
재(再) 제조란 폐기된 제품을 회수하여 신제품과 같은 품질상태로 회복시키는 과정으로, 제품의 폐기로 인하여 발생하는 경제적 손실뿐만 아니라 폐기물의 증가로 인한 환경오염의 예방에도 도움을 준다. 이러한 재 제조의 목표는 보다 많은 부품들을 재사용하는 것으로 기존의 수리와 제조 개념이 결합된 형태로서 제품의 완전 해체, 세척, 검사, 부품수리 및 조정과 교체, 제품의 재조립 등의 일련의 단계를 거치게 되며 이 과정에서 부품의 신뢰도는 매우 중요한 요소로 작용하게 된다. 따라서 이 논문에서는 크게 다음의 두 가지 내용에 대해서 다루게 된다. 첫째, 시스템의 가용도를 모델링하는 방법으로 잘 알려진 마코프 모델을 이용하여 재 제조 시스템의 가용도 분석을 위한 모델을 제시한다. 둘째, 가용도 분석을 통한 부품의 재사용 빈도와 이용시간 평가 등을 통하여 재 제조 시스템의 성능을 평가하기 위한 척도를 제시한다.
We consider a processing network in which jobs arrive at a fork-node according to a renewal process. Each job requires the completion of two tasks, which are instantaneously assigned by the fork-node to two task-processing nodes that operate like G/M/1 queueing stations. The job is completed when both of two tasks are finished. The sojourn time (or response time) of a job in this G/M/1 fork-join network is the total time it takes to complete the two tasks. Our main result is a closed-form formula for approximating the sojourn-time distribution of a job that arrives in equilibrium.
Preliminary results establish the existence and general formulas for the limiting distribution of the task completion times and sojourn times. These formulas, which are not tractable for computations, provide a framework for our approximation based on certain key parameters. Formulas for these parameters are obtained by the use of bounds, properties of D/M/1 and M/M/1 fork-join networks, and exploratory simulations. Statistical tests show that our formulas are good fits for the sojourn-time distributions obtained from simulations.
The importance of IT in supporting the core business and realizing the targets and vision of the Corporate Plan are beginning to be increasingly recognized. In order to evaluate IT performance many methods and techniques have been suggested over the years. One potential solution is the use of Kaplan and Norton's Balanced Scorecard as a conceptual and pragmatic model for the development of performance measures for an IT Department. This paper explores how the Balanced Scorecard approach might be applied to measuring the performance of the IT Department within the non-profit Organization.
This paper considers a single machine scheduling problem where the machine is shared by multiple sub-production systems. Each sub-production systems has heterogeneous local objectives (e.g., minimization of total completion time, maximum tardiness and makespan).
In a distributed manufacturing environment, no sub-production system has complete information (e.g., processing time, due date) of the entire system. This paper provides a distributed scheduling method to find close-to-optimal coordination on the shared machine using minimum local information sharing among sub-production systems. The proposed method is compared to pareto solution that can be found in a centralized environment.
This paper considers a job shop environment where machines are shared by several sub-production systems. The local objective of a sub-production system is the minimization of total completion time. In a centralized environment, a single decision maker has complete information of processing time, job routing and local objectives. In this case, the problem is a traditional job shop scheduling problem to minimize the total completion time which is well-known NP-hard problem. Meanwhile, it is assumed that no sub-production system has a complete view of the entire system in a distributed environment. This paper proposes a distributed scheduling methodology that maintains autonomy of each sub-production system while pursuing system-wide performance in job shop environment. The proposed method is compared to the performance of centralized solutions.
This paper considers six sigma projects for the PCB industry. This paper is divided into the following four parts. In the first part, the concept and properties of six sigma management are introduced. In the second part, some tools of six sigma project using DMAIC phases are studied for a PCB manufacturing process. In the third part, some tools of six sigma project using DMADOV phases are considered for a PCB research and development process. Finally, some tools of six sigma project for a PCB transaction process are given.
In this paper we develop an efficient procedure for solving the tactical-level room allocation problem for hotel industry by incorporating other sources of revenue into overall Revenue Management (RM) system. To maximize profits and allocate wisely available resources, first, determine how different market segments contributed. And apply this to an efficient procedure for solving tactical-level room allocation problem for the hotel industry by combining the dynamic model for handling single-night reservation requests and the static model for handling multi-night reservation requests.
최근 기술집약적인 경제성장의 중요성이 강조되고 있는 가운데 이공계 진학과 기술직종선택의 감소는 성장잠재력에 가장 근본적인 위협이 된다. 이를 유지하려는 여러 가지 정책이 교육학적이나 사회학적 근거에서 제시되고 있으나 이를 분석하는 이론적 경험적 틀이 상대적으로 부족한 상태이다. 직업선택모델은 사회학적인 접근법이 활발하게 진행되었으나, 경제적 동인에 대한 분석, 성별, 인종별 분석이 부족하다. 본 논문에서는 2000년 미국 센서스 데이터에 나타난 가장 국제화된 미국의 기술직 사례를 통해 경제학적인 인적자본 모델을 기준으로 하여 기술직에 대한 기존의 연구와 비교한다. 기존의 모델을 확장하여 이민의 직업선택모델의 관점에서 원주민의 경우와 비교하며, 동시에 타 직업군과 비교한다. 직업선택에서 미래소득에 대한 예측이 대체로 정확하나 실제의 선택이 다르다는 사회학적 논문들의 주장은 성간 차이의 문제를 제외하고는 현격하지 않다. 민족적 차이의 효과도 인적자본효과에 비해서는 크지 않다. 과학기술직은 고급 화이트칼라 직종에 비해 결혼과 교육 언어 경험면에서 저급한 직종의 특성을 보인다.
RDIF란 전자파를 이용하여 무선으로 사물을 인식하고 데이터를 자동으로 인식하고 데이터를 자동으로 수집하며, 사물간의 네트워크을 형성시켜주는 기술로서 산업전반에 걸친 인프라를 뜻한다. 즉 제품에 붙이는 TAG에 생산, 물류, 재고, 소비등 전과정에 대한 정보를 담고 자체 안테나를 부착시켜 리더(Reader)기로 하여금 그 정보를 읽고, 인공위성이나 이동통신망에 연계하여 정보시스템과 통합해 사용하는 활동을 의미한다. RFID는 높은 인식률, 비 접촉형 인식매체, 도달거리, 다른 통신망과의 연계및 통신 가능성의 확장성으로 물류, 유통, 군사, 식품, 안전 등 전반적인 비즈니스영역에 애플리케이션으로써 막대한 파장을 미칠 것으로 전망된다.
여러 기관이나 각 나라마다 RFID에 대한 정의는 조금씩 다르게 말하고 있지만 기존 사람 대 사람간의 통신에서 사람 대 사물, 사물 대 사물의 통신이 가능하도록 마이크로 센서 기술과 정보통신기기의 이용을 보다 편리하게 해주는 인터페이스 환경 및 네트워크를 구성하는 것이 RFID를 이용한 유비쿼터스 컴퓨팅 또는 네트워크의 실행에 있어 중요한 부분이라는 데는 모두 동의하고 있다.
Six sigma has been the most influential management innovation tool in order to achieve the customer's satisfaction and keep the competition in the age of limitless competition. The success in six sigma is to find the correct CTQ(Critical to Quality). QFD(Quality Function Deployment) is the efficient too ever created to tie product and service design decisions directly to customer wants and needs. One of the mistakes in QFD is to analyze using an inconsistent HOQ(House of Quality) chart. An inconsistent HOQ chart is one in which the information from the correlation matrix is inconsistent with that from the relationship matrix. This study presents the consistency check and inconsistency check in case of failing the consistency check. Also we propose the procedures using the Limiting Probability in correlation matrix and the Median Rank in relationship matrix in order to be consistent in HOQ chart.
Over ten years, 6 sigma management is applied a lot in the part of indirect business as well as the manufacturing industry. But it has still been used restrictively the technique used on DMAIC that is a basic roadmap of 6 sigma. This paper finds the improving skills that is used in the parts of manufacturing and indirect business and demonstrates their available scope with 6 sigma projects. And this indicates which skills for improving are used valuable on each step of DMAIC with a systematic classification.
Mobile technologies and services have become one of the inevitable parts of people's lives and mobile businesses have also been widespread. Nevertheless, there have been no such studies of mobile services in the industry and most of the studies have been concentrated on mobile Internet services. therefore, the goals of this study is to find out corporate key parts for popularizing mobile banking services by clarifying the activate method of mobile banking services and to get some tips for service providers and users. The results are following; First, Service Quality, Personal Innovativeness, Social Influence, don't influence users' Perceived Usefulness, which means that when people use mobile banking services, whether people around them use the services doesn't have a significant effect on them. Considerably, that's because mobile banking services are different from games and entertainment contents provided through cell phones that many can easily use and be affected by people around them and reference groups. Second, people use mobile banking services; when they experience the convenience and familiarity; when the service would help them work efficiently. Much of the preceding researches have dealt with service provider only and have focused on mobile Internet. In this regard, when it comes to a viewpoint that regards the mobile banking sector as a new sector of mobile businesses, this study is significant.
A number of stores can save costs by forming central warehouses. In this paper, transportation cost is included in the inventory model with the continuous review policy, namely, (Q,R) policy. The objective of this paper is to develop an efficient simulated annealing algorithm and heuristic for large-scale problems of determining the location and the number of central warehouses by minimizing total costs. Some computational results and suggestions for future research are also discussed.
The purpose of implementing supply chain management is quick decision making and effective execution on the affairs of management by sharing information. It is critical that companies are needed to innovating supply chain process in oder to maintain their international competitiveness. The improvement of supply chain process makes the S company to provide better products than any other companies do. This case study investigates the introduction and strategy development of supply chain management at the S company.
The goal of this study is to develop supply chain management strategies by reviewing best practices of advanced global enterprises and to find key performance indicators suitable for the S company. Four focused factors for the establishment of basic supply chain process are organizing task force team, changing to process type organization, definite assignment of role and responsibility, and constructing information system.
Vehicle routing problem with Time Windows is determined each vehicle route in order to minimize the transportation costs. All delivery points in geography have various time restriction in camparision with the basic Vehicle routing problem. Vechicle routing problem with Time Windows is known to be NP-Hard, and it needs a lot of computing time to get the optimal solution, so that heuristics are more frequently developed than optimal algorithms. This study aims to develop a heuristic method which combines guided local search with a Tabu Search in order to minimize the transportation costs for the vehicle routing assignment and uses ILOG programming library to solve. The computational tests were performed using the benchmark problems.
This study is to provide comparative analysis for failure and problem at energy technology induction. Skill fare contract company which enforce in Korea institute of energy research (KIER), Industries, learned circles, research institute assignment company, bright prospect van company, bluechip medium and small enterprises company etc., chose technology induction connection company 200 companies. These company into compensation question investigation enforce. Question contents with company's general item, composed by problem that face in technology induction, part for failure of technology induction.