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dc.contributor.advisorO'Connor, James Thomasen
dc.creatorPeng, Minen
dc.date.accessioned2008-08-28T22:58:08Zen
dc.date.available2008-08-28T22:58:08Zen
dc.date.issued2006en
dc.identifierb64876457en
dc.identifier.urihttp://hdl.handle.net/2152/2607en
dc.descriptiontexten
dc.description.abstractThe intent of this research was to improve the preliminary cost estimating procedures at the Texas Department of Transportation (TxDOT) and develop a computational tool that simplifies the process of preparing preliminary cost estimates. An item-level quantity-based approach was proposed for this research study. The primary motive for this approach was to segregate the impacts of unit prices from the estimates in order to improve accuracy and reduce the difficulty in updating the estimating models. Furthermore, this approach enables continuous tracking and control by initiating quantity estimates at the outset. This research study was focused on the development of statistical models for predicting item-level quantities based upon available basic project parameters. Major work items, defined as those accounting for 80 percent of the total cost, were identified for each major project type in TxDOT; and either a statistical prediction model or a fixed cost percentage was developed for each major work item based upon historical data. These quantity models and fixed cost percentages were integrated into a database management system, Preliminary Item-Level Cost Estimating System (PILCES), to estimate costs at both the item-level and the project-level. This dissertation discusses the statistical quantity models for structures-related and miscellaneous construction-related major work items. The design concept and implementation of PILCES are also described in this dissertation.
dc.format.mediumelectronicen
dc.language.isoengen
dc.rightsCopyright is held by the author. Presentation of this material on the Libraries' web site by University Libraries, The University of Texas at Austin was made possible under a limited license grant from the author who has retained all copyrights in the works.en
dc.subject.lcshRoads--Estimates--Texasen
dc.subject.lcshRoads--Texas--Costsen
dc.titleItem-level quantity-based preliminary cost estimating system for highways structures and miscellaneous constructionen
dc.description.departmentCivil, Architectural, and Environmental Engineeringen
dc.identifier.oclc85484448en
dc.type.genreThesisen
thesis.degree.departmentCivil, Architectural, and Environmental Engineeringen
thesis.degree.disciplineCivil Engineeringen
thesis.degree.grantorThe University of Texas at Austinen
thesis.degree.levelDoctoralen
thesis.degree.nameDoctor of Philosophyen


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