Now showing items 2281-2300 of 5185

    • Robust Statistical Estimators for Use within Competitive Bid Data 

      Larry G. Crowley (American Society of Civil Engineers, 1997)
      Location and scale estimates calculated from project bid data measures the consensus value from among the bidders along with their collective uncertainty about that value. Five robust statistical location and scale estimators ...
    • Data Representation for Predicting Performance with Learning Curves 

      John G. Everett; Sherif H. Farghal (American Society of Civil Engineers, 1997)
      Mathematical learning curve models can be used to predict the time or cost required to perform future cycles in a repetitive construction activity. The analyst has a choice of several methods of representing the data, ...
    • Learning Curves: Accuracy in Predicting Future Performance 

      Sherif H. Farghal; John G. Everett (American Society of Civil Engineers, 1997)
      Many repetitive construction field operations exhibit a phenomenon known as the learning or experience effect. A learning curve is generated when the time or cost required to complete one cycle of an activity is plotted ...
    • Project Characteristics for Successful Public-Sector Design-Build 

      Anthony D. Songer; Keith R. Molenaar (American Society of Civil Engineers, 1997)
      The use of design-build project procurement is rapidly increasing in the public sector. Documented design-build success and imminent changes in federal procurement law are indicators of continued large-scale growth in the ...
    • Resource-Based Modeling for Construction Simulation 

      Jingsheng Shi; Simaan M. AbouRizk (American Society of Civil Engineers, 1997)
      The application of simulation in the construction industry has always been hindered by the complexities involved in constructing simulation models and the resultant time requirement. This paper presents a modeling method ...
    • Combined Discrete-Event/Continuous Simulation for Project Planning 

      Simaan M. AbouRizk; Rod J. Wales (American Society of Civil Engineers, 1997)
      This paper focuses on the application of “combined simulation modeling” to achieve more accurate and flexible modeling of random processes affecting construction progress. In particular, a model is presented where a project ...
    • Constructability Improvement of Steel Silos during Field Operations 

      Ashraf M. Elazouni (American Society of Civil Engineers, 1997)
      Steel silos are widespread around the world, and are used for storing different materials, including cement, fertilizers, grains, and raw materials. Building a new silo provides a fairly big storage capacity within a short ...
    • Shock Vibration Effects on Freshly Placed Concrete 

      Allen J. Hulshizer; Ashok J. Desai (American Society of Civil Engineers, 1984)
      Freshly placed (green) concrete is vulnerable to weakening of its properties if subjected to forces which disrupt the concrete matrix during the formative bond development process. Insufficient qualitative data, relating ...
    • The Architect/Engineer's Role in Rehabilitation Work 

      Osama E. K. Daoud (American Society of Civil Engineers, 1997)
      Rehabilitation projects often suffer from delays and escalating costs. This may be attributed to a high degree of uncertainty in defining the scope of work for these projects during the design stage. This is particularly ...
    • Electrical Construction Foreman Task Scheduling 

      Bolivar A. Senior (American Society of Civil Engineers, 1996)
      The short-term task scheduling of electrical foremen working in commercial and institutional construction projects was evaluated using a combination of interviews, questionnaires, and field observations. The planning ...
    • Multiple Heavy Lifts Optimization 

      Kuo-Liang Lin; Carl T. Haas (American Society of Civil Engineers, 1996)
      Heavy lift planning has a major impact on construction sequencing, scheduling, budgeting, and safety. This paper addresses problems presented by planning for multiple lifts on a single jobsite. This is a common and ...
    • Owner-Contractor Relationships on Contaminated Site Remediation Projects 

      Cynthia M. Ruff; David A. Dzombak; Chris T. Hendrickson (American Society of Civil Engineers, 1996)
      Contaminated site remediation projects have characteristics that distinguish them from conventional construction projects, including substantial regulatory oversight and significant uncertainty about subsurface conditions ...
    • Scheduling with Computer-Interpretable Construction Method Models 

      Martin A. Fischer; Florian Aalami (American Society of Civil Engineers, 1996)
      Current scheduling tools require the manual translation of design information to activities and typically do not provide dynamic links between cost estimates and corresponding schedules. To take advantage of the increasingly ...
    • ArcSite: Enhanced GIS for Construction Site Layout 

      M. Y. Cheng; J. T. O'Connor (American Society of Civil Engineers, 1996)
      This study develops an automated site layout system for construction temporary facilities (TFs). The system, ArcSite, including a geographic information system (GIS) integrated with database management systems (DBMSs) is ...
    • Holistic Appraisal of Value Engineering in Construction in United States 

      Angela Palmer; John Kelly; Steven Male (American Society of Civil Engineers, 1996)
      The use of value engineering in the United States of America has grown significantly in the last twenty years. Advocates of the system claim it is effective in reducing cost and improving the value of construction projects. ...
    • Application of BOT System for Infrastructure Projects in China 

      Liyin Shen; Rowson K. H. Lee; Zhihui Zhang (American Society of Civil Engineers, 1996)
      The Build-Operate-Transfer (BOT) concept has now become an accepted means of securing private-sector involvement in infrastructure projects. The popularity of BOT mechanisms is growing in the developing countries, which ...
    • Project-Network Analysis Using Fuzzy Sets Theory 

      Pasit Lorterapong; Osama Moselhi (American Society of Civil Engineers, 1996)
      Estimating the durations of construction activities requires experts knowledge. Statements used by these experts usually contain some sort of imprecision. Previous studies have demonstrated the use of fuzzy set theory for ...
    • Culture of Using Mobile Cranes for Building Construction 

      Aviad Shapira; Jay D. Glascock (American Society of Civil Engineers, 1996)
      While tower cranes traditionally are identified with high-rise, congested urban building construction, and mobile cranes primarily are associated with heavy civil and infrastructure construction, there exists a vast ...
    • Optimum Equipment Life by Minimum Life‐Cycle Costs 

      Courtland A. Collier; David E. Jacques (American Society of Civil Engineers, 1984)
      A minimum cost equipment replacement model based on the present worth of discounted‐cash‐flow is presented. The model uses arithmetic and geometric gradients to project the expected life cycle costs of the existing machine ...
    • Risk Allocation in Lump-Sum Contracts—Concept of Latent Dispute 

      Francis Hartman; Patrick Snelgrove (American Society of Civil Engineers, 1996)
      This paper presents findings of a pilot study and investigation into construction contracts. The investigation evaluated the effectiveness of written contract language to communicate risk apportionment between contracting ...