• 한국IT서비스학회지
• /
• 제16권2호
• /
• pp.45-60
• /
• 2017

The study suggests a contract model of application operation through case study of A bank's IT outsourcing application contract based on workload. The IT outsourcing order form has a problem in that the scope of work is ambiguous due to the integration of operation and maintenance. In this study, application operation and maintenance were separated by referring to application operation history provided in ISO/IEC15504-5 standard. The scope of the IT outsourcing service was clarified by organizing the definition and detail activities of the application operation business. Application operation contract method has generally applied estimation method by the number of input manpower and period by agreement between buyer and client. As there is no activity to calculate the number of input manpower based on the operational work history and based on the standard workload per activity. In this case is not guaranteed due to the simple agreement between the contractors. In this paper, we propose an application operating cost estimation model that measures the size of the operating software using function point analysis that is the basis of application operation tasks. In order to verify the validity of the application operation cost model, we verified the correlation between the application size and the labor cost through regression analysis using SPSS.

• 경영과정보연구
• /
• 제17권
• /
• pp.107-133
• /
• 2005

The purpose of this study was to analyze a trend of profitability classified by characteristics of hospitals and to analyze related factors. The data for this study were derived from survey material conducted by the Korean Hospital Association on 33 hospitals in Korea between 1993 and 2002. Profitability was measured in the aspect of investment profit rate and operation profit rate with net profit to total assets, normal profit to total assets and operating margin to gross revenue as dependent variables. Independent variables were classified by general factors (ownership, number of beds, period of establishment, region), financial factors (total asset turnover, liabilities to total assets, current ratio, fixed ratio, inventories turnover, personnel costs per operation profit, material costs per operation profits), composition of manpower and facilities(personnel and area per beds), productivity index(the number of daily patients per medical doctor, the number of daily patients per nurse), the score of quality assurance activities. First, Concerning the specialists per beds or area per beds and profitability of hospitals there was not statistically significant. Second, Those hospitals having the most daily patients per nurse had significantly higher profitability than the others, but the number of daily patients per medical doctor had little effect on the profitability. Thirds, Those hospitals having a higher proportion total asset turnover tended to show significantly higher profitability compared to other hospitals, but the liabilities to total assets and liquidity ratio had a little difference to the profitability. Those hospitals having a higher proportion personnel costs per operation profit and material costs per operation profits tended to show significantly lower hospital profitability compared to other hospitals. Fourth, In regression analysis, hospital profitability had negative relationship with personnel costs per operation profit or material costs per operation profits. While it had positive relationship with total asset turnover, the number of daily patients per nurse. In conclusion, private hospitals had higher profitability than that of public hospitals. Though factors related to profitability of hospital were different according to ownership, it is important for securing appropriate profitability by operating appropriate number of nurse, raising total asset turnover, and reducing personnel costs, material costs per operation profits. This study can be used as a baseline data for planning of hospital management. But the study may be limited in that the results cannot be generalized due to its small sample size. However, this longitudinal observation of 33 hospitals over ten year period has significant merit alone.

• 한국철도학회:학술대회논문집
• /
• 한국철도학회 2005년도 춘계학술대회 논문집
• /
• pp.1047-1053
• /
• 2005

This study explored pattern of train operation between Seoul Cheonan after the introduction of KTX in 2004. Both number of trains and seat capacity per day have increased but maximum number of trains per specific hour hasn't changed much. Demand for train shows that it concentrated in a specific time, so number of trains during the peak hour should be increased. But, it is difficult due to line capacity, so increasing seat capacity per train might be an option. An increase in seat capacity should be considered the characteristics of each train lines.

• 대한수학교육학회지:수학교육학연구
• /
• 제19권4호
• /
• pp.513-530
• /
• 2009

이 연구에서는 초등학교 1-2학년 교육과정, 해설서, 및 그에 따른 교과서에 나타난 수 감각 지도 내용을 분석한다. 이를 위해 수 감각에 관한 선행연구를 메타분석하여 수 감각의 의미와 요소를 규명한 다음, 그것을 이용해서 교육과정, 해설서, 1-2학년 교과서에서의 수 감각 지도 내용을 비판적으로 분석한다. 수 감각은 기존의 전통적인 수에 관한 학습에서 강조되었던 수와 계산과 더불어 어림을 포함하여, 수와 계산이 필요한 맥락에 적용하는 능력을 강조하는 용어로, 내용 요소와 과정 요소로 구성된다. 이 두 요소를 바탕으로 교육과정, 해설서, 1-2학년 교과서를 분석한 결과, 수 감각의 범위가 불분명하고, 용어를 일관되게 사용하지 않고, 다루고 있는 요소가 제한적이며, 일관되지 않거나 빈약한 상태로 교과서에 구체화되어 있음을 알 수 있었다.

• 아동학회지
• /
• 제30권1호
• /
• pp.109-125
• /
• 2009

This study examined the effects of estimation activities on children's operation and measurement abilities. Subjects were 60 five-year-old children. This experiment used the untreated control group design with pretest and posttest. Instruments used to collect data were the Number and Operation and Measurement tests part of the Test of Mathematics Ability for Young Children (TMAYC) developed by Hong, Lee and Chung (2006). ANCOVA was employed for statistical analysis. Results of the posttest showed that children in the experimental group scored significantly higher on children's operation and measurement abilities than the control group. Results imply that an estimation program can be an effective teaching model for improving children's operation and measurement abilities.

• 산업경영시스템학회지
• /
• 제20권43호
• /
• pp.249-263
• /
• 1997

This paper addresses the parts route selection and economic design in flexible manufactuirng system (FMS). Parts are processed through several stage workstations according to operation sequences. The machine of each workstation can do multiple operation functions. And the operation stage of a part can be processed in several workstations, which are non-identical in functional performance. The objective of this paper is to determine the processing routes of parts, number of machine at each workstation, number of vehicle and makespan time. Two models are suggested. One is assumed that the operation stage of parts can be processed at the only one among several available workstations. Other is assumed that the operation stage of parts is allowed to be processed at several workstations. Parts are transported by automated guided vehicles (AGVs). The decision criteria is to minimize the sum of processing cost, travel cost, setup cost and overhead cost. The formulation of models is represented. A solution algorithm is suggested, and a numerical example is shown.

• 한국학교수학회논문집
• /
• 제8권4호
• /
• pp.423-444
• /
• 2005

초등 수학교육에서 수감각을 적절히 활용하는 것이 매우 중요함에도 불구하고 이에 대한 연구는 상대적으로 부족한 실정이다. 이에 본 연구는 초등학교 6학년 학생들을 대상으로 기본적인 계산 능력과 수감각 수행 능력을 분석하였다. 특히, 수감각 연구에 초점을 두어, 수감각의 주요 구성요소별로 다양한 문제 상황에서 자연스럽게 수감각을 활용하는지, 어떤 수감각을 활용하는 지 등을 면밀하게 분석하였고, 이를 토대로 수감각 개발에 관한 시사점을 도출하였다.

• 시스템엔지니어링학술지
• /
• 제18권2호
• /
• pp.117-125
• /
• 2022

In the early 2000s, the rapid decline in the fertility rate resulted in a decrease in military resources to maintain the conscription system. In addition, there has been a further decline in the fertility rate in recent years. So, it is necessary to efficiently utilize military resources to prepare for future problems. The Republic of Korea Navy is planning to reduce the number of crew to operate the newly built warships to prepare for this trend of decreasing in troop resources. However, if the number of crew is reduced without reviewing the appropriate number of crew for the operation of the warship, a bigger problem may be encountered in the future. In order to solve this problem, research is being conducted to examine whether the number of crew aboard a warship is appropriate using simulation. However, it is difficult to create a crew simulation model due to the lack of detailed data related to crew operation. In this study, to solve this problem, a method of generating quantitative data using qualitative survey results was suggested, and the process of creating a crew simulation model was performed using this.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2006년도 Proceedings of ISRS 2006 PORSEC Volume II
• /
• pp.824-826
• /
• 2006

The number of satellite under operation is being on the increase, however, because the number of operator is limited the reliable control system is necessary for stable mission operation. Especially it is necessary that error event indication such as colour or sound should be displayed with high reliability for intuitional monitoring. The limit range of KOBAS2 provides realistic value that is defined with in-orbit value and related document. It makes it possible for operator to monitor a number of telemetry data easily through single screen system instead of monitoring each mnemonics. The development and operation experience of KOBAS2 will contribute to the development of the evolved automatic telemetry monitoring system for future mission.

• 산업경영시스템학회지
• /
• 제35권2호
• /
• pp.37-44
• /
• 2012

This paper focuses on scheduling problems arising in the military. In planned artillery attack operations, a large number of threatening enemy targets should be destroyed to minimize fatal loss to the friendly forces. We consider a situation in which the number of available weapons is smaller than the number of targets. Therefore it is required to develop a new sequencing algorithm for the unplanned artillery attack operation. The objective is to minimize the total loss to the friendly forces from the targets, which is expressed as a function of the fire power potential, after artillery attack operations are finished. We develop an algorithm considering the fire power potential and the time required to destroy the targets. The algorithms suggested in this paper can be used in real artillery attack operations if they are modified slightly to cope with the practical situations.