While VE in South Korea must be performed according to law, there is no standard evaluation method for the design values and value indices, and few studies have been conducted on this topic. The me...

A Numerical Value Evaluation Model for the Optimum Design Selection

VE aims at reduction in a budget, improvement of function, structural safety and quality security for public construction projects. However, there is possibility for the structural safety and quality security review to be insufficient because related regulations are mostly composed of analysis on economic efficiency of design. In addition, due to the misconception about VE as a cost saving methodology, an alternative is being presented which still focuses mainly on cost saving, but with no objective evaluation of function related to cost. In order to improve this, the government adopted the reduction of life cycle cost and proposal of value improvement, and let people specify the cost and function of the original plan versus the alternative plan, and the value changes between them. However, it is written mainly into practical convenience rather than theoretical basis since a specific way is not suggested. The current method sets a different starting point by applying the attributional difference of function and cost. Furthermore, an evaluation standard for correlating is an important element in rational decision making for assessing and choosing an alternative. This paper analyzes the process and method of function & cost scoring when performing VE and suggests a mathematical normalization model in order to support rational decision making when selecting an optimum plan.

https://www.koreascience.kr:443/article/JAKO201523964822233.pdf

Calculation Model for Function & Cost Score based on Normalization Method in Design VE

Tower crane hoisting plan is one of the key element for the success of entire High-Rise Building construction Hoisting time is the basic factor to appropriate hoisting plan which need to the hoisting load estimate and tower crane selection With this reason, accurate hoisting time is needed to the proper hoisting plan The current hoisting time estimation for High-Rise Building focus on the hoisting cycle time estimation with historical data However, this method underestimated the external influences like environmental factor Thus, this paper aims to develop the hoisting time estimation model with discrete event simulation which include the wind influences with certain height According to the simulation result, the hoisting time which applied wind influence is increasing with height growth Because of the high speed wind, the upper area of building has more operation delay time than the mechanical operation time Seoul, the research area, has the most fastest wind speed on April and the least on October Due to these differences of wind speed, the hoisting time is estimated with significant differences between April and October This hosting time estimation model would be used for estimating the influence of wind Moreover, this could apply to make the realistic hoisting plan

A Study of the Tower Crane Hoisting Time Estimation Simulation Model with Climate Element for the High-Rise Building Construction

Appropriate selection of lifting equipments for a high-rise building construction project is one of the important factors to the project’s success. Proper position of a tower crane on a construction site is so important to be determined by an expert or an experienced construction manager who draws working range of a tower crane and moves it over 2D(dimensional) site layout plan. 3D CAD, BIM, and virtual reality are is used for building design and construction, but it is not usual to use them for temporary facility planning or selection of a tower crane. This study proposes a suitable method to use augmented reality to select proper position of tower cranes. An augmented reality prototype is implemented by Vuforia and Unity 3D on a smart device to verify the practicability of the proposed method. The prototype application installed on a smart device shows several tower cranes on different markers in a real architectural drawing to locate the proper tower crane.

Method to Select Tower Cranes Using Augmented Reality in Smart Devices

VE workshop is performed based on VE expert` experiences without retrieving VE data of similar previous projects. Moreover, it usually omitted or applied for the sake of formality due to insufficiently understanding VE function, limited time, space and budget. Even though many studies have established VE databases for retrieving and reusing VE data, VE workshop is still inefficient and ineffective to improve projects` values. With this regard, this study proposes a preliminary prototype for improving VE workshop, which utilizes the state-of-the-art information communication technologies(ICTs) including Building Information Modeling(BIM), Mobile Computing(MC), Network Service System(NSS), and Database Management System(DBMS) for better managing, storing and reusing VE data. The prototype was developed to evaluate advantages and limitations. The results show that the proposed prototype can support visual VE data retrieval from similar previous projects, enhance communication among VE team and save much time and cost comparing to traditional VE. Through this, the productivity of VE workshop can improve efficiently and effectively.

A Preliminary Study of Prototype for Improving VE Workshop Phase based on BIM

Recently, the scale of construction work has been growing, and buildings are becoming higher. To enable greater efficiency of construction work, the use of vertical transportation equipment has been radically increasing. In this context, many studies have been conducted on tower cranes. While these studies have discussed issues such as the selection of tower cranes, the optimization of locations, and the hoisting time of tower cranes, there has been no research on the installation of tower cranes. As such, the installation of tower cranes on construction sites has been accomplished based on subjective judgment and technical assistance, and the experience of workers in equipment companies. Therefore, this study analyzes the productivity of tower cranes using simulation methodology, and proposes a generalized model of the installation process of tower cranes in order to offer a basic resource that site managers can directly utilize.

/pdf/a-productivity-analysis-of-tower-crane-installation-progress-56ifqfagfh.pdf

A Productivity Analysis of Tower Crane Installation Progress Based on Simulation Technique

In Korea, many mixed-used development projects(MXD) in mega project size are currently active. As these mega projects require long-term construction and execution and involve by different subjects in different fields, their completion breeds various problems, such as conflicts among project participants due to their complicated interest relationships and inaccuracy in predicting the economic performance of the projects due to inappropriate facility capacity planning. To solve these problems, it is essential to apply value engineering (VE) at the planning phase of the project, which can result in the best possible cost reduction and improvement of project performance. However, not many projects are actually implementing VE because of the lack of available information, as well as the limitations due to uncertainty in the early period of project execution. Therefore, this study aimed at proposing VE Team Building, Quality Model Performance Indexes, Space Model so as to resolve common mega project problems and overcome VE application limitations at planning stage. The result of this study is expected that the data can be utilized as basic data to apply VE at the planning phase of the large complex projects.

/pdf/development-of-pre-workshop-phase-for-the-ve-application-at-1ydmg7i7pp.pdf

Development of Pre-workshop Phase for the VE application at the Early Planning Stage of the Mega Project

Design value engineering (VE) has been performed in many construction projects according to the changes in the construction for most of the VB function analysis that performed, are problems that focus on function analysis and generating ideas based on individual experience of VE team member than generating ideas and value improvement of systematic function analysis. This may be due to the quotation of previously performed function analysis data, general function analysis, and abstract function definitions that do not cite the concrete characteristics of each facility. Therefore, in this study, the proposed cases from the existing design VE workshops, the current conditions of the connection between functions and ideas and of the idea categorization by building part were studied to determine why functions and ideas are not connected, and to propose pertinent improvement directions. on a performance-based function categorization system by building part that can provide the logical connection between functions and ideas in the function definition/categorization and function arrangement phases in the function analysis phase, the most important phase in VE activities, was developed by reflecting the required performance and functions for each part of the facility.

Development of Function Breakdown Structure of Building Element based on Performance for Idea Connection in Design VE

The role and importance of VE have been enlarged since VE application was mandatory by law in public sector in March, 2000. Public organizations have widened the technological horizon through VE competitions and applied VE technique to private investment projects. Many studies have been carried out on function analysis and VE procedure. In practice it is common that clients make a decision one-sidedly on whether or not VE proposals are selected. The VE procedure itself is not smooth. This study gives some suggestions on VE appraisal procedure and criteria at the last phase on VE process in order to smooth the progress of VE. The results of this study can be used as a tool to improve efficiency in the management of VE.

A Study on Procedures and Methods for Evaluating VE Alternatives at Design Phase in Construction Projects

서비스 로봇은 환대산업의 서비스 패러다임의 전환을 이끄는 대표적인 4차 산업혁명 기술이다. 서비스 로봇이 인간직원을 대체하며 고객의 서비스 경험에 직접 관여함에도 불구하고 로봇의 서비스 품질 관리를 위한 이론적 근거는 제시되지 않았다. 본 연구의 목적은 사회적 존재 이론을 기반으로 인간직원의 사회적 존재와 서비스 환경에 따른 지각된 상호작용과 서비스 품질 기대의 교호작용 효과를 확인하고, 인간직원의 사회적 존재와 지각된 상호작용, 서비스 품질 기대의 관계에 대한 서비스 환경의 조절효과를 밝히는 것이다. 이 목적을 달성하기 위해 최근 1년 이내에 호텔 투숙 경험이 있는 고객 160명을 대상으로 시나리오 기반 실험설계를 통해 자료를 수집하였다. 본 연구의 결과는 첫째, 버틀러 로봇보다 체크인 로봇에 대한 지각된 상호작용은 인간직원의 사회적 존재의 영향을 많이 받는 것으로 나타났다. 둘째, 인간직원의 사회적 존재가 결여될 때 체크인 로봇의 서비스 품질 기대가 감소되는 수준은 버틀러 로봇보다 큰 것으로 밝혀졌다. 셋째, 서비스 환경에 따른 상호작용의 조절된 매개효과가 확인되어 인간직원의 사회적 존재와 서비스 환경에 따라 지각된 상호작용은 변화하여 서비스 품질 기대에 영향을 미치는 것으로 확인되었다. 본 연구의 결과는 서비스 로봇의 연구범위 확대에 기여하였으며 환대기업 관리자에게 서비스 로봇이 구현되는 서비스 환경 설계에 대한 통찰력을 제공한다. 

The effects of human social presence on perceived interaction and service quality expectation: the moderating role of service environment with service robot

Yun-Sik Kim

Papers

A Productivity Analysis of Tower Crane Installation Progress Based on Simulation Technique

Development of Pre-workshop Phase for the VE application at the Early Planning Stage of the Mega Project

Development of Function Breakdown Structure of Building Element based on Performance for Idea Connection in Design VE

A Study on Procedures and Methods for Evaluating VE Alternatives at Design Phase in Construction Projects

The effects of human social presence on perceived interaction and service quality expectation: the moderating role of service environment with service robot