• 한국건설관리학회논문집
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• 제6권1호
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• pp.125-132
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• 2005

국내 건설기업들은 건설시장에서 경쟁우위를 확보하기 위해 모든 공종을 대상으로 원가절감 및 품질향상을 위한 노력을 경주하고 있다. 특히, 건축공사에서 골조공사는 전체 공정 및 원가에 영향을 크게 미치는 주요 공정으로서 철저한 공사 계획과 관리가 요구되는 부분으로서 생산활동 및 공사방식 선정효과를 크게 볼 수 있는 항목이다. 따라서 공사계획 단계에서 설계도서와 현장조건을 면밀히 분석하여 품질, 안전을 확보하면서 공기단축, 원가절감, 시공성 향상을 꾀할 수 있는 대안 개발이 필요하다. 본 연구는 설계 및 시공단계에서 지하 구조물의 원가절감을 창의적, 체계적으로 수행하기 위한 개선방안으로 YE기법을 검토하였다. 또한 이를 이론적, 실무적으로 적용 가능한 것으로 발전시키기 위해 지하 골조공사에 대한 VE모델을 정의하고 이를 실제현장에 적용하여 원가절감 효과와 VE 활용성을 검토한다. 따라서 본 연구는 건축물 지하 골조공사의 VE 활용모델로서 기술대안 선정방식 수립의 기초적 인 연구가 될 것으로 기대된다.

• 대한안전경영과학회지
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• 제8권3호
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• pp.67-75
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• 2006

Scheduling of dismantling old research reactor need to consider time, cost and safety for the worker. The biggest issue when dismantling facility for research reactor is safety for the worker and cost. Large portion of a budget is spending for the labor cost. To save labor cost for the worker, reducing a lead time is inevitable. Several algorithms applied to reduce read time, and safety considered as the most important factor for this project. This research presents three different dismantling scheduling scenarios. Best scenario shows the specific scheduling for worker and machine, so that it could save time and cost.

• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.640-648
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• 2022

In the United States, the Safety Rest Areas (SRAs) were introduced as highway roadside infrastructures in the early 1900s. The State Departments of Transportation (DOTs) operate/maintain their SRAs using different methods. The Washington DOT used the in-house workforce method for over 20 years, whereas some states moved to Performance-Based Contracting (PBC) from the in-house workforce to save cost primarily. Several existing studies claimed that using the PBC approach saved costs on several highway assets. Thus, the principal objective of this study is to compute and compare the unit operating/maintenance cost of SRAs using the in-house workforce method (in Washington state) with the PBC approach (in other states). The findings of this study show that the average annual cost using the PBC approach was much more than the average annual cost using the in-house workforce approach. The findings also show that in Washington state, the 'Labor Cost' category was a key expenditure, which is statistically higher than other categories. The 'Labor Cost' was followed by the 'Other Services', and then 'Materials and Supplies' and 'Equipment.' The study's findings indicated that outsourcing does not always save costs for agencies. The study findings may help transportation construction/maintenance professionals select a cost-effective approach for their future planning.

• Journal of the Korean Statistical Society
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• 제29권3호
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• pp.319-336
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• 2000

A mixed model with a white noise process and an IMA(0,1,1) process is considered as a process model. It is assumed that the process is a white noise in the absence of a special cause and the process changes to an IMA(0,1,1) due to a special cause. One useful scheme in measuring the process level is to use the variable measurement interval (VMI) between measurement times according to the value of the previous chart statistic. The advantage of the VMI scheme is to measure the process level infrequently when in control to save the measurement cost and to measure frequently when out of control to save the off-target cost. This paper considers the VMI scheme in order to detect changes in the process model from a white noise to an IMA(0,1,1). The VMI scheme is shown to be effective compared to the standard fixed measurement interval (FMI) scheme in both statistical and economic contexts.

• 한국안전학회지
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• 제11권1호
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• pp.99-107
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• 1996

This survey is to compare the the number of accidents which were occurred in 24 construction companies with the average accident in construction industry. The number of accidents in 24 companiesis is lower than the average accident, then it is classified "save", otherwise it is classified "loss". This survey is conducted to have top management be interested and invest for safety by recognizing that safety management could be profit for the company. The result of this survey is as follows : The total save amount in 1992 is 44,780mi11ion Won and average is 1,870mi11ion Won, with being 11, 200mi11ion Won by reduction amount of deaths and 33,580mi11ion Won by reduction amount of injuries. In 1993 the total is 33,330mi11ion Won and average is 1,390mi11ion Won, and in 1994 the total is 38, 720mi11ion Won and the average is 1,610mi11ion Won. This result is save amount of workmen's compensation insurance with excluding the indirect costs for accidents. The company which ranked the highest save amount is B Construction Company with being 15.1 billion Won and the next is A Construction Company during 3 years. The Company which ranked highest percentage of save amount to sales amount is Q Heavy industry with being 0.359% and the next is B Construction Company during 3 years.pany during 3 years.

• 대한설비공학회:학술대회논문집
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• 대한설비공학회 2008년도 하계학술발표대회 논문집
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• pp.493-498
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• 2008

The several water resources are showed recently the various pollution types due to the industrialization and the disarranged district development. The living waste water, plant waste water and so are contaminated continuously and the recycling water is concerned highly to save the cost and to improve the environment as the general people. The dust and the heavy metal in the air and the acid rain are contaminating the river water and the underground water. The clean environment is on the rise to the general people and is to be the social problems. There is going to complement and repair the water supplying and fire extinguishing pipeline to save the construction cost and improve the environment in the construction facilities parts. Therefore, in this paper the recycling water treatment/supply apparatus using the living waste water is considerated technically and is raised on the practical uses.

• Communications for Statistical Applications and Methods
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• 제27권6호
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• pp.689-699
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• 2020

This study investigates the effect of life settlement on the monopolistic insurance market. In particular, we consider liquidity cost, which is the cost incurred to the insurer to meet the request of surrender, and trading cost, which is the transaction cost of the policyholders for the settlement. We first show that the introduction of a life settlement can increase insurance demand and enhance consumer welfare even when the trading cost is higher than the liquidity cost. That is, even if the settlement market is less efficient than the insurance market, both insurance demand and consumer welfare can be increased. Second, the insurer's profit can also be increased when settlement is introduced because not only can the insurer save the liquidity cost but also the demand of insurance increases. Lastly, insurance demand does not always decrease when both costs increase. Depending on the population distribution over the liquidity risk, the demand of insurance can be increased or decreased.

• 한국조명전기설비학회:학술대회논문집
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• 한국조명전기설비학회 2007년도 추계학술대회 논문집
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• pp.291-294
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• 2007

Countries in the world are setting up policies to implement anti-global warning measures to actively cope with the Agreement on Climate Change. Rising problems related to energy and environment prompted research and development efforts to highly efficient electric instrument and environmentally friendly products to secure resources and save energy Korea's high dependency on imported energy and its lack in natural resources make it urgently necessary to develop energy efficient instrument and equipment that can save energy. Every household now uses a transformer, which is very important instrument among others. A variety of technologies to manufacture transformers are currently used along with efforts to develop new materials. Development nit of high efficient transformers is called for by the time and has direct economic impact on suppliers and consumers. In addition, it is desirable to install a transformer that is trustworthy, secure, low on loss, anti-incident capable, small, anti-flammable, environmentally friendly, cost-efficient high-frequency resistant and easy for maintenance. To do this, it is necessary to look deeper into a highly efficient transformer that can save energy. This paper will discuss the types and characteristics of various transformers and propose ways to save energy and raise efficiency tv analyzing a environmentally friendly amorphous transformer.

• Journal of Biosystems Engineering
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• 제21권4호
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• pp.474-481
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• 1996

Farm mechanization has been rapidly progressed in rice farming since the 1980's, in Korea. The mechanization has been achieved up to 95-97% in the year of 1995, except irrigation and drying process. However, rice production cost remains much more expensive than the cost of other rice farming countries. Since labor cost shares a major portion of the production costs, it is essential to save labor cost with automation and more sophisticated mechanization. However, it requires great capital investment which causes farm management worse. Therefore, the computer program was developed which can select machines to minimize the management and maintenance cost by analyzing available working days in different areas, machinery to purchase, farming size, total farming size in a village, number of machines and custom fee.

• 대한안전경영과학회지
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• 제7권2호
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• pp.95-106
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• 2005

Many Korean companies are challenged to reduce logistics cost and meet environmental-friendly logistics. The textile companies in harsh competition are requested to make improvement on their logistics environment to cut down the total cost. However, they have reached the limit on improving the manufacturing process. We believe that the logistics department is the most improvable part at present. Improving logistics will be highly effective to cut down the total cost. In this study, we present Pad Pool System(PPS) as the solution to save their logistics cost. PPS, which means the shared use of Styrofoam pads, will enable the textile companies to cut down their cost and strengthen enterprise competitiveness. Also, PPS will be helpful reducing environmental disruption because the system reuses retrieved Styrofoam pads many times.