• 경영과학
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• 제27권2호
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• pp.31-44
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• 2010

It is very important to forecast demand and determine the optimal procurement quantities of spare parts. The Army has been forecasting demand not with actual usage of spare parts but with request quantities. However, the Army could not purchase all of forecasted demand quantities due to budget limit. Thus, the procurement quantities depend on the item managers' intuition and their meetings. The system currently used contains many problems. This study suggests a new determination procedure; 1) forecasting demand method based on actual usage, 2) determining procurement method through LP model with budge and other constraints. The newly determined quantities of spare parts is verified in the simulation model, that represents the real operational and maintenance situation to measure the operational availability. The result shows that the new forecasting method with actual usage improves the operational availability. Also, the procurement determination with LP improves the operational availability as well.

• 한국경영과학회지
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• 제35권1호
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• pp.111-124
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• 2010

In the last decade, traveling purchaser problem (TPP) has received some attention of the researchers in the operational research area. TPP is a generalization of the well-known traveling salesman problem (TSP), which has many real-world applications such as purchasing the required raw materials for the manufacturing factories and the scheduling of a set of jobs over some machines, and many others. In this paper we suggest heterogeneous multiple traveling purchaser problem with budget constraint (HMTPP-B) which looks for several cycles starting at and ending to the depot and visiting a subset at a minimum traveling cost and such that the demand for each product is satisfied and the cost spent for purchasing the products does not exceed a given budget threshold. All the past studies of TPP are restricted on a single purchaser. Therefore we randomly generated some instances. CPLEX is used for getting optimal solutions in these experiments.

• 디지털산업정보학회논문지
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• 제20권1호
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• pp.119-131
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• 2024

The purpose of this study is to examine the operational performances by the investment level of information security in companies. The theoretical background summarized the meaning of information security, management information security, and network security. The research process was carried out in four stages. As a result of the analysis, the level of information security was classified into four groups, and the difference in operational performance was confirmed. According to the categorical regression analysis of the three dependent variables, independent variables such as network threats, non-network threats, executive information security awareness, industry, organizational size, and information security education all affected information security regulations, in-house information security checks, and information security budget investments. The theoretical implications of this study have contributed to updating the latest information security theory. Practical implications are that rational investments should be made on the level of information security of companies.

• 품질경영학회지
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• 제45권1호
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• pp.1-10
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• 2017

Purpose: Most enterprises adopt six sigma acts to maximize the business performance with raising the executiveness for the project improvements in each parts. But there are little studies about six sigma actual operations in manufacturing whether the six sigma improvements that have injected a lot of budget, efforts, labours and time are run properly. Methods: This study select 31 interviewees who have MBB or BB from 5 large enterprises running six sigma over 10 years and 5 SMEs running six sigma over 5 years to understand and review the operational status of six sigma actions in manufacturing industry and to secure representativeness. This study identify the operational status of six sigma actions and key factors enhancing or impeding execution of six sigma projects through face-to-face interviews and online surveys by e-mail. Results: This study figured out the operational status of six sigma actions and key factors enhancing or impeding execution of six sigma projects. We used SPSS 16.0 for the reliability and the validity of survey data. Conclusion: There can be a lot of different factors that affect six sigma project improvements besides the key factors from this study. More study need to think of the organization characteristics and the basic conditions and to remedy the unreasonable points and defects rather than following foreign companies and enterprises.

• 한국비블리아학회지
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• 제28권2호
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• pp.185-217
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• 2017

본 연구에서는 서울시 작은도서관을 대상으로 작은도서관의 운영현황을 조사하고 중요도와 만족도 등에 대한 인식을 파악하고자 하였다. 이를 위해 서울시 861개 작은도서관을 대상으로 전반적인 운영 만족도, 운영 개선사항, 운영사항에 대한 중요도 등에 대해 조사하였다. 연구결과, 유형별 구분에 따른 공립과 사립에 구별 없이 작은도서관에 대한 운영지원 확대, 홍보 강화, 자원 봉사자의 교육 및 처우 개선, 장서의 질적향상 도모, 공간과 시설의 지속적 개선 등이 요구되는 것으로 나타났다. 또한 획일적인 예산지원 및 지도관리가 아니라 운영주체에 따른 운영 특성을 감안하여 공립과 사립으로 구분하여 작은도서관 개선을 위한 방안을 설립할 필요가 있을 것으로 보인다.

• 품질경영학회지
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• 제7권1호
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• pp.41-50
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• 1979

The purpose of this study is to examine the introduction and its application of objectives management system in practical case, This study attempts to describe, (1) the relationships between the objectives management and budget management (2) analyzed the introduced organization and applicable system for the performance of objectives. Concepts of objectives, as this study is adjusted as follows; i) Objectives must be operational. They must be capable of being converted into specific targets and specific assignments. Therefore, objectives are the basis for work and assignments; they determine the structure of the business, the key activities which must be discharged, and, above all, the allocation of people to tasks. ii) Setting objectives for investment requires also objectives for the structure, basic policies, jobs, and directions of the business itself. They are not selling objectives; They are genuine marketing objectives, and as such have to be built into the way the business itself is set up, directed, structured, and run.

• 국제학술발표논문집
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• The 6th International Conference on Construction Engineering and Project Management
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• pp.639-640
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• 2015

Traditional construction planning based on historical data and heuristic adjustment can no longer incorporate all the operational details and guarantee the expected performance. The variation between the expected and the actual production leads to cost overruns or delay. Although predicting reliable productivity on construction site is getting more important, the difficulty of this increases. In this regard, this paper suggested to develop BIM-integrated simulation framework. This framework could predict productivity dynamics by considering factors affecting on construction productivity at operational phase. We developed the following processes; 1) enabling a BIM model to produce input data for simulation; 2) developing the construction operation simulation; 3) running simulation using BIM data and obtaining productivity results. The BIM-integrated simulation framework was tested with structural steel erection model because steel erection work is one of the most critical process influencing on the whole construction budget and duration. We could improve to predict more dynamic productivity from this framework, and this reliable productivity helps construction managers to optimize resource allocation, increase schedule reliability, save storage cost, and reduce material loss.

• 한국건설관리학회논문집
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• 제23권4호
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• pp.26-35
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• 2022

1997년 제7차 교육과정이 개정됨에 따라, 건축물의 형태 변화를 통해 매년 교육시설물의 꾸준한 에너지 사용량 증가로 이어지고 있다. 교육시설에서는 운영예산 산출 시에 수년간 지출실적, 전기요금 단가 인상 등을 고려하여 예산을 산정한다. 이러한 예산산출 방식을 통해 적절하지 않은 운영비의 배분이 이루어져 예산계획 수립에 부정적인 영향을 줄 수 있다. 따라서, 본 연구에서는 교육시설물의 전기에너지 사용량에 따른 운영예산 관리방안 제안을 위해 교육시설물의 전기에너지 사용량 관리모델을 개발하였다. 모델개발을 위해 문헌고찰과 교육시설물의 특성을 고려하여 전기에너지 관련 환경, 물리, 정책 요인별 1차 핵심변수를 도출하였으며, 상관분석을 통해 2차 핵심변수를 도출하였다. 도출된 2차 핵심변수를 기반으로 회귀분석을 실시하여 전기에너지 사용량 관리모델을 개발하고, 이를 활용한 관리방안을 제안하였다. 본 연구에서 개발한 관리모델은 각 요인의 변화에 따른 유동적인 운영예산 산출근거로서 활용될 수 있다.

• 디지털산업정보학회논문지
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• 제15권2호
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• pp.87-99
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• 2019

The purpose of this study is to examine an organizational ICT(Information and Communication Technology) performance by ICT investment and policy consistency of government organizations. As the rapid development of ICT is becoming an essential element of social culture, the ICT operation of bureaucratic government also is becoming important. The central government has invested substantially new ICT for improving the quality of nationwide service and to promote administrative efficiency. However, various departments of government occur frequently duplication investments of ICT, and budget conflicts between organizations caused difficulties in maximizing ICT competency. I will confirm the ICT operational performance by ICT investment behavior and organizational work competency as well as the significance of ICT policy consistency. The method of study used a structural equation. The research model set ICT investment behavior as independent variables, organizational work competencies and policy consistency as mediations, and operational performance as dependencies. As a result of the research, New ICT interests show negative effects that caused work change between government organizations and government-funded body. But, New ICT convergence shows positive effects on increasing the two competency variables. The two competency variables show negative effects that caused changes in ICT policy consistency and show no impact on the ICT operational performance. The ICT policy consistency shows a positive effect on enhancing ICT operational performance. The study contribution explain updated the contingency theory and because the ICT policy consistency is essential, negotiation between government organizations will be important. Future research will require a qualitative study through interviews in government organizations about consistency enhance of ICT policy.

• 산업경영시스템학회지
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• 제39권3호
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• pp.129-138
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• 2016

The train-centric control systems development has some distinct points in that a big size of government budget is in general expended in there and the development duration seems to be long. In addition, the changes are ever made continuously in the capability and operational requirements for Trains. Thus, the impact of the potential changes in the required operational capability on the development activities can induce some type of project risks [7]. As such, proper management of project risk has been one of crucial subjects in the train systems development. All these notes combined together make it the significance of the safety management process be raised further up in the train-centric control systems development. As such, the underlying safety management process should be capable of appropriately handling the potential risks that can be created due to the unexpected changes and the long-term development period. The process should also be complemented for the safety consideration of train-centric control systems, for instance, stop. To study these aspect is the objective of the paper. To do so, a step-by-step approach to analyzing the safety management process is first presented. Then, to enhance the process some necessary and useful activities are added in terms of risk and safety management. Then, to pursue some enhancement on the process, a set of necessary and useful activities are added in terms of risk and safety management. The resultant process is further analyzed and tailored using a design structure matrix method. The resultant process is applied in a train-centric control development as a case study.