• Communications for Statistical Applications and Methods
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• 제10권3호
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• pp.647-654
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• 2003

Bayesian probability models for finite populations are considered assuming so-called the super-population. We find the posterior distribution of population mean by a new approach, using the concept of pivotal quantity for the small sample case. A large sample theory is also treated throught the concept of asymptotically pivotal quantity.

• 한국CDE학회논문집
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• 제20권4호
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• pp.431-442
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• 2015

Currently, a BIM-based quantity takeoff (QTO) system is mainly focused on architectural projects. To perform this, diverse quantity takeoff methods such as an object-based automatic quantity takeoff, manual quantity and base functions of calculation have widely been utilizing. However, since BIM library for road projects includes structural elements associated with alignment, it is necessary to establish cost estimation system interlocked with historical cost using 3D library by each unit length. Accordingly, the aim of this study is to develop cost estimation model with using a historical cost approach so that it can be utilized in construction planning based on the BIM library for road projects. For this, based on the BIM library for road, the standardized quantity is estimated, and a process for calculating historical cost and a verification model with a 5D simulation was developed by mapping a WBS code with each BIM library object. This can be applied during the approximate cost estimation process in a project planning and an initial design phase for road projects. Besides, it is expected that these results will be utilized in constructing an optimal historical cost estimation process for project libraries.

• 품질경영학회지
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• 제40권4호
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• pp.441-452
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• 2012

Purpose: In this paper, we have considered a problem of newsvendor model in an environment of random yields in quality and customer balking behavior, in which only the mean and the variance of the demand are known. In practice, the distributional information of the demand is very limited and only the mean and variance are guessed by experience. In addition, due to the customers balking behavior occurring when the available inventory level decreases, the product's demand becomes a function of inventory level so that the classical newsvendor's optimal order quantity is no longer optimal. Methods: We have developed an optimal order quantity model that enables us to incorporate the random yield of a product and the customer balking information such as a threshold inventory level of balking and the corresponding probability of a sale during the balking. Results: We illustrated the concepts developed here through simple numerical examples and showed the robustness of our model in a various setting of parameters. Conclusion: This paper provides a useful analysis showing that our distribution-specific and distribution-free approach to the optimal order quantity in the newsboy model can act as an effective tools to match supply with demand for these product lines.

• 한국산업융합학회 논문집
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• 제22권6호
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• pp.785-795
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• 2019

This paper is a study on the modeling of the quantity estimation model for offshore plant Material handling equipment in FEED(Front End Engineering Design) verification stage using system engineering approach which is an engineering design methods. The relevant engineering execution procedure is not systemized although the operation method and Material handling equipment selection with weight and space constraints is a key part of the FEED. Using the system engineering process, the stakeholder requirements analysis process, the system requirements analysis, and the final system architecture design were sequentially performed, and the process developed through the functional development diagram and Requirement traceability matrix (RTM) was verified. In addition, based on the established process, we propose a Material handling quantity estimation model and Quantity calculation verification Table that can be applied at the FEED verification stage and we verify the applicability through case studies.

• 국제학술발표논문집
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• The 4th International Conference on Construction Engineering and Project Management Organized by the University of New South Wales
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• pp.176-181
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• 2011

A role of cost modeler is that of facilitating design process by the systematic application of cost factors so as to maintain sensible and economic relationships between cost, quantity, utility and appearance. These relationships help to achieve the client's requirements within an agreed budget. The purpose of this study is to develop a parametric cost estimating model for the early design stage by using the multi-dimensional system of OLAP (On-line Analytical Processing) based on the case of quantity data related to architectural design features. The parametric cost estimating models have been adopted to support decision making in the early design stage. These models typically use a similar instance or a pattern of historical case. In order to effectively use this type of data model, it is required to set data classification and prediction methods. One of the methods is to find the similar class in line with attribute selection measure in the multi-dimensional data model. Therefore, this research is to analyze the relevance attribute influenced by architectural design features with the subject of case-based quantity data used for the parametric cost estimating model. The relevance attributes can be analyzed by Analytical Characterization. It helps determine what attributes to be included in the OLAP multi-dimension.

• 한국경제지리학회지
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• 제14권3호
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• pp.241-262
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• 2011

본 연구에서는 한국경제지리학 55년(1956~2010)의 제도적인 측면의 발전과 경제지리학 전공 학회회원의 연구 성과를 발달사적 측면에서 고찰하여 앞으로의 연구 과제를 제시하는 것을 목적으로 한다. 한국경제지리학은 4시기로 구분할 수 있는데, 경제지리학 요람기(1956~1962), 정립기(1963~1970년대 후기), 도약기(1980~1990년대 전기), 전환기(1990년대 후기 이후)가 그것이다. 한국 대학의 많은 지리교육과와 지리학과는 정립기와 도약기에 설립되었고, 총 연구물 편수(1,621건)의 44.4%가 2000년대에 발표되었으며, 연구 분야 중 광 공업지리학이 22.7%를 차지하였다. 연구물 중 경험적 접근방법이 약 2/3를 차지하였고, 연구 틀에서는 지역구조론과 공간 시스템론이 각각 약 40%를 차지하였다. 미래의 한국 경제지리학 연구 분야의 발달을 위해서는 자연환경뿐만 아니라 경제 사회 문화 지식 등의 측면에서 철저한 지역조사를 바탕으로 새로운 접근방법의 개발로 사회과학 발달에 공헌하여야 할 것이다.

• 교육녹색환경연구
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• 제1권1호
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• pp.44-58
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• 2001

This study aims to establish new architectural agenda for the existing middle school facilities responding to individualized interactive learning approach(IILA). First, it investigates the mechanism of new teaching methods and contents proposed in the national level curriculum and the province guidances. Secondly, it suggests the Quality and Quantity of new (multi-purpose) classrooms that should be built for operating new curriculum in the existing middle schools. Finally, it finally emphasizes the educational specification that should be prepared prior to planning school buildings.

• Industrial Engineering and Management Systems
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• 제13권4호
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• pp.369-382
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• 2014

This paper introduces a new multi-product multi-period multi-objective aggregate production planning problem. The proposed problem is modeled using multi-objective mixed-integer mathematical programming. Three objective functions, including minimizing total cost, maximizing customer services level, and maximizing the quality of end-product, are considered, simultaneously. Several constraints such as quantity of production, available time, work force levels, inventory levels, backordering levels, machine capacity, warehouse space and available budget are also considered. Some parameters of the proposed model are assumed to be qualitative and modeled using fuzzy sets. Then, a fuzzy goal programming approach is proposed to solve the model. The proposed approach is applied on a real-world industrial case study of a color and resin production company called Teiph-Saipa. The approach is coded using LINGO software. The efficacy and applicability of the proposed approach are illustrated in the case study. The results of proposed approach are compared with those of the existing experimental methods used in the company. The relative dominance of the proposed approach is revealed in comparison with the experimental method. Finally, a data dictionary, including the way of gathering data for running the model, is proposed in order to facilitate the re-implementation of the model for future development and case studies.

• 한국건설관리학회논문집
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• 제8권4호
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• pp.155-166
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• 2007

본 연구는 건축공사 프로젝트의 기본 설계 단계에서의 개산견적 개념모델을 제안하고, 제안된 개산견적 개념을 적용하여 실제 주상복합 건물 프로젝트의 실적자료의 분석을 바탕으로 한 프로토타입 개발을 목적으로 한다. 국내의 건설산업은 급격한 시장 변화와 경쟁 심화의 과정을 겪고 있다. 특히 프로젝트의 조달 방식의 변화와 함께 입찰과 관련한 정보가 부족한 사업초기, 기본설계 단계에서 중요한 의사 결정이 이루어지며, 이러한 의사 결정의 기준이 되는 개산 견적의 중요성이 더욱 증가 되고 있다. 따라서 본 연구에서는 기존의 개산견적 방법을 분석하고 그것을 보완할 수 있는 공사 수량 변화 분석에 기반 한 개산견적 방법을 제안하고 프로토타입을 구축하였다. 또한, 이 연구에서는 기존의 공종별 공사비 분류체계에 빌딩구성요소(BE)별 및 층별 수량 분류를 추가하고 있다. 이러한 개념을 바탕으로 제안 모델을 Q-BASE (Quantity Based Active Schematic Estimating) 모델로 정의하였다.

• Journal of the Korean Academy of Child and Adolescent Psychiatry
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• 제17권2호
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• pp.98-105
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• 2006

Objectives : To consider which questions are most useful clinically and to find a framework for assessment of suicidality or risk of suicide for adolescents. Methods : Authors reviewed and integrated both clinical works and researches about measures used to evaluate suicidal behaviors in adolescents. Results : The 'cascade approach' for assessment of suicidality was developed; the quality and quantity of 'distress' leads to an entry question to do with the 'quality of life' and whether it is worth living. These two questions lead to examinations of 'thoughts' which may lead to 'plans' which leads to 'threats' which then leads to 'deliberate self injury' and then on to a history of 'past suicide attempts'. Authors also suggested to use a summed score of cascade approach in clinical decisions and showed how to modify it up to different evaluation situations. Focusing on the good things helps not only to qualify suicidality but also to begin the search for solutions. Conclusion : In the clinical assessment process, while scales assist the clinician, there is nothing to supplant a sensitive clinical approach. The 'cascade approach' was proposed as a framework for assessing adolescents for suicidality.