... The relative hierarchical breakout and description of these levels in construction management are shown in Figure 1.1. It is clear that the organizational, project, and activity levels have a basicproject and top management focus,... more
... The relative hierarchical breakout and description of these levels in construction management are shown in Figure 1.1. It is clear that the organizational, project, and activity levels have a basicproject and top management focus, while the op-eration, process, and work task ...
... top of page ABSTRACT. An abstract is not available. top of page AUTHORS. Daniel W. Halpin No contact information provided yet. Bibliometrics: publication history Publication years, 1976-2005. Publication count, 11. Citation Count, 25.... more
... top of page ABSTRACT. An abstract is not available. top of page AUTHORS. Daniel W. Halpin No contact information provided yet. Bibliometrics: publication history Publication years, 1976-2005. Publication count, 11. Citation Count, 25. Available for download, 10. ...
ABSTRACT Simulation has gained significant importance as an analysis tool for construction operations over the past two decades. Since the development of CYCLONE by D.W. Halpin (1976), construction simulation has been improved along with... more
ABSTRACT Simulation has gained significant importance as an analysis tool for construction operations over the past two decades. Since the development of CYCLONE by D.W. Halpin (1976), construction simulation has been improved along with computer technology. Although simulation is a powerful and effective tool in analyzing and improving construction operations, its usage in the construction industry has been limited. Construction simulation requires a user to have a thorough understanding of simulation methodology, which requires technical training and experience to grasp the knowledge needed for it. This research introduces the Interactive Simulation System, which provides an environment for users who are not familiar with running simulation programs. In order to improve the accessibility and the usability of construction simulation programs, the Interactive Simulation System adopts Internet technology and the standard model concept from MicroCYCLONE, which provides user-friendly input and output environments through World Wide Web
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... is avoided altogether. The PICASSO also enhances the quality of the scheduling information normally found in simulation. Its scheduling procedures yield resourceutilization statistics and activity chain float. The forward pass ...
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This paper provides a methodology for feasibility analysis of robotics in the construction industry. Major factors in robotization of construction processes are identified as need, technology, and economics. Ten characteristics supporting... more
This paper provides a methodology for feasibility analysis of robotics in the construction industry. Major factors in robotization of construction processes are identified as need, technology, and economics. Ten characteristics supporting the need for robotization have ...
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... R. KANGARI" and DW HALPINb "Assistant Professor, School of Civil Engineering, Georgia Institute of Tech., Atlanta, GA 30332, USA bProfessor ... 1986; Ishikawa, 1988; Nakamura et al., 1987; Nakamura et al., 1988; Ueno et al.,... more
... R. KANGARI" and DW HALPINb "Assistant Professor, School of Civil Engineering, Georgia Institute of Tech., Atlanta, GA 30332, USA bProfessor ... 1986; Ishikawa, 1988; Nakamura et al., 1987; Nakamura et al., 1988; Ueno et al., 1986; and Ueno et al., 1988). ... Kangari and Halpin ...
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ABSTRACT The decision-making process is a very essential part of any construction operation. Simulation can be used as a tool to assist construction managers in making informed decisions. In this paper, simulation is applied to concrete... more
ABSTRACT The decision-making process is a very essential part of any construction operation. Simulation can be used as a tool to assist construction managers in making informed decisions. In this paper, simulation is applied to concrete batching operations to analyze alternative solutions and resource management. Data are collected to define activity durations for the plant. A simulation model is constructed for the plant using the MicroCYCLONE simulation system. Based on sensitivity analysis, management tools are constructed to help the decision maker. These tools are a time-cost-quantity chart, a feasible region analysis, and a contour lines chart. Time-cost-quantity and contour lines charts are used for determining production time, production cost, and resources for a required distance from the plant. The feasible region chart is used for determining the range of alternative solutions that can be taken to minimize production time and cost of the available plant resources, according to the required transportation distance.
Research Interests: Civil Engineering, Project Management, Construction Management, Productivity, Resource Allocation, and 10 moreSensitivity Analysis, Production Management, Decision support system, Planning, Simulation, Numerical Simulation, Building, Resource Management, Plant production, and Construction Engineering Management
ABSTRACT This study quantifies the effects of accidents by defining one of the indirect costs, the productive time lost owing to accidents in utility trenching operations. The probability of accidents, estimated by fuzzy-logic-based... more
ABSTRACT This study quantifies the effects of accidents by defining one of the indirect costs, the productive time lost owing to accidents in utility trenching operations. The probability of accidents, estimated by fuzzy-logic-based analysis of the performance of the factors (training, supervision, and preplanning) affecting safety in utility trenching operations, was used to quantify, based on simulation analysis, the productivity loss due to process delays resulting from accidents during excavation and pipe installation. It was determined that the productivity loss resulting from accidents during excavation is greater than that resulting from accidents during pipe installation. During excavation, the "very poor" condition of preplanning is most critical to productivity loss due to accidents, whereas during pipe installation, the condition of training and supervision affects the productivity loss more than that of preplanning. This paper provides insights into the relationship between the condition of the safety factors and the possible productivity loss by concomitant probability of accidents to quantify the effects of the accidents.Key words: effect of accidents, probability of accidents, productivity, fuzzy logic, simulation.
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ABSTRACT The traditional network scheduling methods such as the Critical Path Method (CPM), Programme Evaluation Review Technique (PERT), and bar charting are typically not effective for the planning of linear construction projects.... more
ABSTRACT The traditional network scheduling methods such as the Critical Path Method (CPM), Programme Evaluation Review Technique (PERT), and bar charting are typically not effective for the planning of linear construction projects. Linear scheduling methods, on the other hand, model the progress of repetitive activities in sloping lines and are more effective for linear modelling and analysis. Nonetheless, their use in the construction industry has so far been very limited. Among other reasons for this is the unfamiliarity of construction personnel with these techniques, which plays a major role in hampering their application. This paper introduces a graphically based approach to assist in the linear programming (LP) modelling of linear scheduling analysis. The Planning & Optimization for Linear Operations (POLO) system provides a graphic LP modelling environment in which model formulation can be easily accomplished in a graphic and interactive fashion. Thus, the application of linear scheduling methods can be facilitated. The Isle of Palms Connector Bridge project in Mount Pleasant, South Carolina is used to demonstrate the use of the system.
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... Acknowledgments. The writers express their special gratitude to Dr. Lefteri H. Tsoukalas, professor and head of the ... Simulation analysis of productivity variation affected by accident risk in underground construction operations.... more
... Acknowledgments. The writers express their special gratitude to Dr. Lefteri H. Tsoukalas, professor and head of the ... Simulation analysis of productivity variation affected by accident risk in underground construction operations. PhD dissertation, School of Civil Engineering ...
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ABSTRACT The world is increasingly becoming a single marketplace. To compete well, design and construction firms must better understand international customers and their needs in order to strategically plan to meet those needs. A project... more
ABSTRACT The world is increasingly becoming a single marketplace. To compete well, design and construction firms must better understand international customers and their needs in order to strategically plan to meet those needs. A project conducted by the International Task Force of the Construction Industry Institute (CII) investigated this topic by interviewing a wide range of international client organizations. Interviews were conducted in the Pacific Rim, Europe, South America, The Middle East, and the United States. The objectives of these interviews were to (1) identify significant future needs of the international client; (2) evaluate needs along with the plans/visions of engineering and construction clients to determine trends and expectations of the engineering/construction (E/C) community; and (3) make recommendations to EIC contractors as to how they can better serve clients in the year 2000 and beyond. This paper reports on the findings of this study and the conclusions presented in the CII report entitled ''The Future Needs of the Construction Industry's Worldwide Customers.''
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The installation of pile foundations is complicated by an enormous number of problems. They include unseen sub-surface obstacles, lack of contractor experience, and site planning. These major problems and other minor ones make it... more
The installation of pile foundations is complicated by an enormous number of problems. They include unseen sub-surface obstacles, lack of contractor experience, and site planning. These major problems and other minor ones make it difficult for the estimator to evaluate the piling project productivity and cost. Therefore, this study is designed to assess these problems using simulation. Both piling process productivity and cycle time assessment are addressed. Data were collected for this study through designed questionnaires, site interviews, and telephone calls to experts in different construction companies. Many variables have been considered in the piling construction process. Two simulation models have been designed and validated to assess piling process productivity and cycle time. Consequently, two sets of charts have been developed based upon the validated models to provide the decision-maker with a solid planning, scheduling and control tool for piling projects.
The installation of pile (drilled shaft) foundations is complicated by an enormous number of problems. They include unseen subsurface obstacles, lack of contractor experience, and site planning. These major problems and other minor ones... more
The installation of pile (drilled shaft) foundations is complicated by an enormous number of problems. They include unseen subsurface obstacles, lack of contractor experience, and site planning. These major problems and other minor ones make it difficult for the estimator to evaluate the piling project productivity and cost. This study is designed to assess these problems using regression technique. The piling process activities' duration, productivity, and cost assessment are addressed. Data were collected for this study through designed questionnaires, site interviews, and telephone calls to experts in different construction companies. Many variables have been considered in the piling construction process. Seven regression linear models have been designed and validated to assess productivity, cycle time, and cost.
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... simulation model for the jacking operation of a bridge as part of a mediation between the public owner and a ... The CYCLONE model built for the process accurately predicted the total number of man-hours lost due to the added ...... more
... simulation model for the jacking operation of a bridge as part of a mediation between the public owner and a ... The CYCLONE model built for the process accurately predicted the total number of man-hours lost due to the added ... State of the Art in Construction Simulation 1275 ...
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Page 1. Proceedings of the 1994 Wznter Simulation Conference ed. JD Tew, S. Manivannan, DA Sadowski, and AF Seila SUWULATION OF CABLE-STAYED BRIDGES USING DISCO Rong-Yau Huang Alexandros M. Grigoriadis Daniel W. Halpin ...
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ABSTRACT The world is increasingly becoming a single marketplace. To compete well, design and construction firms must better understand international customers and their needs in order to strategically plan to meet those needs. A project... more
ABSTRACT The world is increasingly becoming a single marketplace. To compete well, design and construction firms must better understand international customers and their needs in order to strategically plan to meet those needs. A project conducted by the International Task Force of the Construction Industry Institute (CII) investigated this topic by interviewing a wide range of international client organizations. Interviews were conducted in the Pacific Rim, Europe, South America, The Middle East, and the United States. The objectives of these interviews were to (1) identify significant future needs of the international client; (2) evaluate needs along with the plans/visions of engineering and construction clients to determine trends and expectations of the engineering/construction (E/C) community; and (3) make recommendations to EIC contractors as to how they can better serve clients in the year 2000 and beyond. This paper reports on the findings of this study and the conclusions presented in the CII report entitled ''The Future Needs of the Construction Industry's Worldwide Customers.''
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... Titre du document / Document title. Probabilistic simulation studies for repetitive construction processes = Etudes de simulation probabiliste pour procédés de construction répétitifs. Auteur(s) / Author(s). ABOURIZK SM ; HALPIN DW ;... more
... Titre du document / Document title. Probabilistic simulation studies for repetitive construction processes = Etudes de simulation probabiliste pour procédés de construction répétitifs. Auteur(s) / Author(s). ABOURIZK SM ; HALPIN DW ; ...
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Construction engineering and management education in Central Europe, and its relationship to practice in the construction industry, have concepts that could benefit their counterparts in the United States. This paper first describes the... more
Construction engineering and management education in Central Europe, and its relationship to practice in the construction industry, have concepts that could benefit their counterparts in the United States. This paper first describes the system of education in Central European ...
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ABSTRACT Construction operations involve complex resource interactions and are typically performed in the field with exogenous factors such as inclement weather conditions and equipment breakdowns. The complexity of resource interactions... more
ABSTRACT Construction operations involve complex resource interactions and are typically performed in the field with exogenous factors such as inclement weather conditions and equipment breakdowns. The complexity of resource interactions combined with external factors creates a transient environment for construction operations. This research uses computer simulation techniques and a graphical method, DISCO (Dynamic Interface for Simulation of Construction Operations), for the evaluation of the transient effects of construction operations. DISCO uses the CYCLONE schematic model diagram of a process as the modeling framework and allows breaks or interruptions in the simulation run and stopping of the simulation time clock to investigate the transient states of resources and tasks in a process. The scope of the study focuses mainly on the transient effects caused by the process mobilization of construction operations every day. Two construction operations are used as case studies for the investigation. Results of the study and observations are discussed.
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... Adib M. Hijazi, Simaan M. AbouRizk Associate Member, ASCE, Daniel W. Halpin Member, ASCE. Abstract. ... The paper highlights mathematical models often applied in modeling learning development and reviews the factors that contribute to... more
... Adib M. Hijazi, Simaan M. AbouRizk Associate Member, ASCE, Daniel W. Halpin Member, ASCE. Abstract. ... The paper highlights mathematical models often applied in modeling learning development and reviews the factors that contribute to these phenomena. ...
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Simulators of construction operations often must approximate the underlying distribution of a random process using a standard statistical distribution (eg, lognormal, normal, and beta). In many of these cases, the underlying distribution... more
Simulators of construction operations often must approximate the underlying distribution of a random process using a standard statistical distribution (eg, lognormal, normal, and beta). In many of these cases, the underlying distribution of the random process remains unknown ...
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ABSTRACT The decision-making process is a very essential part of any construction operation. Simulation can be used as a tool to assist construction managers in making informed decisions. In this paper, simulation is applied to concrete... more
ABSTRACT The decision-making process is a very essential part of any construction operation. Simulation can be used as a tool to assist construction managers in making informed decisions. In this paper, simulation is applied to concrete batching operations to analyze alternative solutions and resource management. Data are collected to define activity durations for the plant. A simulation model is constructed for the plant using the MicroCYCLONE simulation system. Based on sensitivity analysis, management tools are constructed to help the decision maker. These tools are a time-cost-quantity chart, a feasible region analysis, and a contour lines chart. Time-cost-quantity and contour lines charts are used for determining production time, production cost, and resources for a required distance from the plant. The feasible region chart is used for determining the range of alternative solutions that can be taken to minimize production time and cost of the available plant resources, according to the required transportation distance.
Research Interests: Civil Engineering, Project Management, Construction Management, Productivity, Resource Allocation, and 10 moreSensitivity Analysis, Production Management, Decision support system, Planning, Simulation, Numerical Simulation, Building, Resource Management, Plant production, and Construction Engineering Management
ABSTRACT This paper presents the methodology used to model the learning development phenomenon in the CYCLONE format using the Boeing learning curve. The learning development enhancement was coded in the MicroCYCLONE (a microcomputer... more
ABSTRACT This paper presents the methodology used to model the learning development phenomenon in the CYCLONE format using the Boeing learning curve. The learning development enhancement was coded in the MicroCYCLONE (a microcomputer version of CYCLONE) environment using QuickBASIC programming. The enhancement allows the user to specify the rate of learning expressed as a percentage, the realization count required for the task duration to increment due to learning, and the threshold at which no more learning improvement can be realized. The existing routines for generating deterministic durations and stochastic durations based on uniform, triangular, and beta distributions were upgraded to calculate durations that reflect the impact of learning development. The learning development enhancement can be extended for use with other simulation programs based on the CYCLONE modeling format. The developed learning-development enhancement was used to model and simulate the learning-development phenomenon for linear construction operation illustrative examples. Findings from the simulation experimentation performed for the illustrative examples are provided. The significance, capabilities, and implementation of the learning-development enhancement are discussed.
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Enterprise resource planning (ERP) was originated in the manufacturing industry. It provides a general working environment for an enterprise to integrate its major business management functions with one single common database so that... more
Enterprise resource planning (ERP) was originated in the manufacturing industry. It provides a general working environment for an enterprise to integrate its major business management functions with one single common database so that information can be shared and ...
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ABSTRACT The introduction, in the 1970s, of the CYCLONE (YCLic Operation NEt-tuorks) simulation methodology established simulation of construction systems as an active area for teaching and research. Since then, there has been... more
ABSTRACT The introduction, in the 1970s, of the CYCLONE (YCLic Operation NEt-tuorks) simulation methodology established simulation of construction systems as an active area for teaching and research. Since then, there has been considerable progress in developing sophisticated simulation-based methods for the analysis of construction processes, and in educational approaches to teach these methods that can be easily incorporated within the construction engineering and management curriculum. CYCLONE, and more specifically MicroCYCLONE, a microcomputer-based program based on this simulation methodology, offer a simple graphical system for the analysis, modeling and experimentation of construction operations. The programs can be readily understood by anyone familiar with construction processes-from construction engineering students to engineering and field personnel. This paper discusses the integration of process simulation into construction engineering education, including a brief description of the general configuration and implementation of the system, and a discussion on some of the problems associated with teaching simulation and possible solutions
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ABSTRACT The traditional network scheduling methods such as the Critical Path Method (CPM), Programme Evaluation Review Technique (PERT), and bar charting are typically not effective for the planning of linear construction projects.... more
ABSTRACT The traditional network scheduling methods such as the Critical Path Method (CPM), Programme Evaluation Review Technique (PERT), and bar charting are typically not effective for the planning of linear construction projects. Linear scheduling methods, on the other hand, model the progress of repetitive activities in sloping lines and are more effective for linear modelling and analysis. Nonetheless, their use in the construction industry has so far been very limited. Among other reasons for this is the unfamiliarity of construction personnel with these techniques, which plays a major role in hampering their application. This paper introduces a graphically based approach to assist in the linear programming (LP) modelling of linear scheduling analysis. The Planning & Optimization for Linear Operations (POLO) system provides a graphic LP modelling environment in which model formulation can be easily accomplished in a graphic and interactive fashion. Thus, the application of linear scheduling methods can be facilitated. The Isle of Palms Connector Bridge project in Mount Pleasant, South Carolina is used to demonstrate the use of the system.
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ABSTRACT Computer simulation can provide an eficient and cost-effective method of analyzing project alternatives, resource constraints and potential progress. It is frequently performed to study the behavior of a system in an attempt to... more
ABSTRACT Computer simulation can provide an eficient and cost-effective method of analyzing project alternatives, resource constraints and potential progress. It is frequently performed to study the behavior of a system in an attempt to improve performance. There are many different analytical methods that can be used to plan or analyze a construction operation. However, in most cases, analytical techniques require abstractions which tend to reduce confidence in model predictions. These methods do, however, offer a basis for validating simulation results. This paper illustrates how Micro CYCLONE, a microcomputer-based simulation language, can be used to measure job productivity in construction. It also illustrates how BetaFit, a microcomputer-based program, can be used to model accurately and eficiently random processes for use in the simulation experiments. The paper also presents a framework for validating construction simulation by reviewing the application of two analytical methods. A roof truss process is modeled using the CYCLONE methodology and then validated using queueing theory and method productivity delay modeling to illustrate the various procedures.
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ABSTRACT Despite the great deal of attention given to project-level management tools (e.g., CPM, PERT, etc.) in recent years, the analysis of construction operations (processes) using computer simulation techniques has generated... more
ABSTRACT Despite the great deal of attention given to project-level management tools (e.g., CPM, PERT, etc.) in recent years, the analysis of construction operations (processes) using computer simulation techniques has generated considerable attention commencing with the introduction of the CYCLONE methodology. Recently, the application of visual simulation (VS) techniques to assist in the planning and analysis of construction operations has directed further attention at the need to better understand the interaction of resources at the process level. Visual simulation takes advantage of advanced modern computer graphics techniques and facilitates the development and application of simulation experiments. Benefits of applying VS have been reported in several publications. Nevertheless, the effort required to design and construct an “appropriate” VS display for the system to be analyzed is usually time and data demanding. The magnitude of model definition is often increased due to certain characteristics of construction operations, such as their complexity and the distribution of work over large areas. An alternative approach, DISCO (Dynamic Interface Simulation for Construction Operations), which employs a schematic modeling format demonstrating the system dynamics on the computer screen during simulation run, is presented in this paper.
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ABSTRACT Recently, the study of processes and of non value-adding tasks at the process level has enjoyed a renaissance in the manufacturing sector because of the emphasis on total quality management and the work of W. Edwards Deming and... more
ABSTRACT Recently, the study of processes and of non value-adding tasks at the process level has enjoyed a renaissance in the manufacturing sector because of the emphasis on total quality management and the work of W. Edwards Deming and others. Interest by the construction industry in the study of processes at this level has been negligible. In order to achieve better quality in construction, the industry must become more process oriented and involved in the study of resource interaction. The CYCLONE modeling system provides an environment for flow charting and studying the interaction of resources within a construction process. The DISCO program which is integrated with the CYCLONE modeling system provides a graphical modeling and simulation environment which facilitates the analysis of construction operations using simulation techniques. The CYCLONE modeling format and the DISCO program interface constitute a foundation upon which improved process design and efficiency can be established. Key words: construction management, simulation, flow modeling, computer methods, construction processes.