Su-Won Yoon

Realtime 4D CAD = RFID for Project Progress Management

This research presents the integration of 4D CAD with RFID (Radio Frequency IDentification) technology to improve the progress management process. The objective of this research was to build an effective and efficient project progress management framework by integrating 4D CAD with RFID technology under a collaborative environment throughout the supply chain of a construction project. This research proposes a system, named 4D+RFID, that presents building elements in 3D CAD models according to as-built progress, where the as-built information is collected in real-time by sensing the progress throughout the supply chain using RFID. 4D+RFID developed in this research aims at supporting processes with a focus on structural and curtain wall elements, such as steel columns and beams, concrete slabs, and curtain walls, which are typically on the critical path of project schedules in high-rise building construction projects. The process is that RFID is applied to sense the progress status of ordering, delivery, receiving, and erection of building elements, and then the as-built progress information is presented in 3D CAD models. 4D+RFID is under development for use in a high-rise office building construction project in downtown Seoul, Korea.

Material Tracker for Construction Logistic

It is necessary to manage materials (including prefabricated components) and identify their data communication process by collecting relevant information in real time for effective and efficient material management in construction projects. Recently, there have been many studies and developments using various wireless technologies including Radio Frequency Identification (RFID) for acquiring material information in real time in the construction industry. However, since existing research project and developments on the application of RFID technology have focused on identification of material and monitoring its logistics by only using RFID technology, they have limitations on identifying material moving flow in logistics and tracking location in an accurate manner. Therefore, the objective of this research is to develop a system that can identify logistics flow and location of construction materials with better performance by using RFID and wireless sensor networks such as Zigbee technologies. The system developed in this research is named as material tracker (MT), and its technical feasibility was verified through a lab test comparing with the existing tracking method using RFID technology only.

Automated Building Information Modeling System for Building Interior to Improve Productivity of BIM-based Quantity Take-Off

Recently Building Information Modeling (BIM) has been widely used to manage building information throughout the project life-cycle more effectively and efficiently. Particularly in quantity take-off and estimation, BIM-based process is getting more and more attention, and even BIM-based quantity take-off at the most detailed level has been performed in several building projects in South Korea. The practitioners involved in those projects have pointed out that modeling rough and finish interior of a building occupies a big portion of time in the whole modeling process and the manual modeling for interior is error-prone, which could cause serious result, such as wrong cost estimation and disputes. To resolve the problem, this research proposes an automated modeling method that model a building interior automatically after selecting an interior method by a room or space basis. This research develops a interior modeling method and a system that can model various rough and finish interior components automatically at once after a user select the type of interior for a given space or room. To do so, this research identifies typical interior types of buildings and a house built in South Korea, and develops a mechanism that can support modeling both typical and non-typical types of interior by allowing the flexibility in selecting interior material and components and the order of construction process for the selected items. The automated modeling system for building interior has been preliminarily tested at a typical condominium building project and found that the system could improve dramatically the productivity of BIM-based quantity take-off and estimation process.

An RFID and BIM based Simulator for Construction Material Logistics and Progress Management

There have been research and developments for effective and efficient logistics and progress management in a construction project. Among them, RFID+4D has been developed for the supply chain management of long-lead item materials such as steel component, precast concrete component and curtain wall by integrating RFID with 4D CAD. And the feasibility of RFID+4D has been verified and validated and the benefits in terms of time and cost were shown in several case studies. However, the previous development of RFID+4D has not been adapted widely because of additional modeling cost, non-real time data update, additional labor for data update, and so forth. Therefore, this research has proposed a framework and process for solving these problems. And the web based simulation system has been developed and verified based on the proposed framework. The proposed framework and process can improve the existing RFID+4D system in a construction project by saving its operation cost and utilizing project information more efficiently and effectively. Also it is expected that the proposed framework could be applied to a method transferring design RIM data to construction BIM data.

BSC Based Measurement of Satisfaction Degree For Based BIM Construction Projets

Building Information Modeling technology (BIM) is one of the most effective solutions to deal with the trend that buildings are getting more and more complicated, large-scaled, and multiple-purposed. BIM in the construction industry is increasingly adopted since the Korea Public Procurement Service announced that BIM would be obligated in a construction project whose total cost is over 50 billion won from 2012. This fact has boosted BIM related research projects as well. However, the majority of the studies have been focusing on the solutions with technological points of view and there has been lack of research on how much degree project stakeholders are satisfied with the BIM adoption in their projects. Therefore, the objective of this study is to investigate the current status and satisfaction degree of stakeholders in a synthesized point of view in BIM-based projects in order to identify critical factors and weak points in the BIM adoption process. The results of this study would greatly help to improve the strategies and processes in BIM-based projects as well as to increase the satisfaction degree of BIM utilization in a project.

An Application Model of RFID Technology on Progress Measurement and Management of Construction Works

Accurate progress management is one of the critical factors for successful project management in the sense that it enables forecasting risks and taking corrective action by monitoring project status. However, the existing progress measurement methods have limits on accuracy and reliability due to ad-hoc measurement based on the personal experience of the project manager; there are no general standards. Radio Frequency Identification (RFID) has emerged as a technology that can be effectively applied for real time measurement of project information in the construction industry, such as for labor management, safety management, equipment management, and progress management of various works. However, previous research projects lack considerations for comprehensive management methods of various work types that are closely related to each other since the existing RFID applications have been proposed to manage single work types or single objects. Therefore, the objective of this research is to propose an application model that can be used to derive an RFID application method by reflecting the characteristics of various works and their integration methods to manage the overall project progress.

Diligence and Indolence Management System for Specialty Contractor on Construction Site -Using GPS of Smart Phone-

The Recent Specialty Contractor in construction of the reduced quantity due to the recession, but competitive in order to increase the number of companies that are increasingly competitive. The field work of one person to perform the work of employees and multiple sites, workforce supply flow that occurs at each stage of information transfer is not made a late staffing. Therefore this research has proposed a new alternative that can overcome them and the entire industry in recent issue smart phone features that take advantage of GPS(Global Positioning System). This paper presents a Diligence and Indolence Management System using GPS of smart phone. offering the advantage of Web-based PMIS(Project Management Information System) through integration with real-time information transfer and smart phone applications for query by building a prototype of a professional construction company as their own on-site management measures are proposed to contribute time and attendance.

Integrated Manpower Information Systems on Construction Site - Using RFID and QR-Code -

It is very important to collect and manage labor information in the construction industry that is labor-intensive. Although research and cases that utilize RFID are increasing for more effective labor management, labor management is limited to the checking-in and -out information management at the entrance of a construction site due to high expense of an RFID reader. Labor and safety information is still managed based on the redundant process that is hand-written in a book and re-input of information by using a personnel-computer. Therefore, the objective of this paper is to develop more effective and efficient process for labor information record and management. This paper presents a prototype application that supports integrated labor information management by incorporating QR-code into RFID-based labor management system and verifies the application through a pilot test and comparison with the existing labor management syste.

A Construction Supply Chain Management Process with RFID/WSN-based Logistics Equipment

Abstract: Construction supply chain management (CSCM) has become one of the critical factors that determine the success of a construction project as it becomes increasingly complicated and mega-sized. Particularly for high-rise or mega-sized building construction, just-in-time supply chain management is required due to lack of storage space and effective logistics for construction components and materials at a construction site. Despite the fact that research and development of radio frequency identification (RFID) and wireless sensor network (WSN) technology have been performed, construction project managers still need to carry mobile devices and check material and component flow at each stage of the supply chain process. This research proposes that the equipment used in the construction supply chain process, such as movers, trailers, gates, and hoists, can become main actors in the supply chain process using RFID and WSN technologies. And the proposed equipment and process focused on a solution to the redundancy identification problem, which has been observed in operations that use RFID/WSN-based processes for construction logistics. This paper also presents issues identified through verification and validation of the research results and proposes further studies Keywords: Radio frequency identification (RFID); Wireless sensor network (WSN); ZigBee; Redundancy identification; Construction supply chain management; RFD/WSN-based equipment; RFID/WSN-based communication; Process automation; Real-time logistics information sharing

A Project Progress Measurement and Management System

A progress management in construction projects plays an important role in providing as-built information for project planning, control, cost engineering, and many others. However, progress information has not been collected through objective methods or criteria but mainly based on an individual’s own experience or subjective judgment, which results in the limits of consistency, objectiveness, and accuracy in the progress management. This research aims at proposing a progress measurement framework that allows managing and applying various measurement methods dependent on work items to overcome the problems and limits of the current progress management. The framework was developed with a focus on integration of work breakdown structure, cost breakdown structure, and progress measurement methods, and it consists of three main objects: work, activity, and progress measurement unit. Base on the framework, an information system named PROSYS (project PRogress management SYStem) was developed to generate activities and progress measurement units depending on the characteristics of projects and work items, and to keep track of project progress more efficiently and effectively.