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Public Presentation of Doctoral Thesis: A Methodology to Make Accurate Preliminary Estimates of Construction Material Quantities for Construction Projects

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Title Public Presentation of Doctoral Thesis: A Methodology to Make Accurate Preliminary Estimates of Construction Material Quantities for Construction Projects
Author García de Soto, Borja
License CC Attribution - NonCommercial - NoDerivatives 2.5 Switzerland:
You are free to use, copy, distribute and transmit the work or content in unchanged form for any legal and non-commercial purpose as long as the work is attributed to the author in the manner specified by the author or licensor.
DOI 10.5446/36606
Publisher Eidgenössische Technische Hochschule (ETH) Zürich
Release Date 2015
Language English

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Subject Area Engineering
Abstract Preliminary estimates heavily influence the fate of a project as they are crucial during the initial decision-making process. Little attention has been given to the development of models for estimating the construction material quantities (CMQs) needed for the different elements that comprise a project. If the required CMQs can be accurately estimated, current unit costs can be included to determine the project cost by creating a pre- liminary estimate with a clear separation between technical estimates (quantities) and market fluctuations in prices (cost of materials and labor). The goal of this work was to develop a method- ology to make accurate preliminary estimates of the CMQs used in construction projects. The pro- posed methodology uses three techniques (RA, NN, CBR) which interact with each other to provide Preliminary estimates heavily influence the fate of a project as they are crucial during the initial decision-making process. Little attention has been given to the development of models for estimating the construction material quantities (CMQs) needed for the different elements that comprise a project. If the required CMQs can be accurately estimated, current unit costs can be included to determine the project cost by creating a pre- liminary estimate with a clear separation between technical estimates (quantities) and market fluctuations in prices (cost of materials and labor). The goal of this work was to develop a method- ology to make accurate preliminary estimates of the CMQs used in construction projects. The pro- posed methodology uses three techniques (RA, NN, CBR) which interact with each other to provide accurate results. The methodology was used to estimate 234 CMQs of structures from cement plant projects. The results obtained exceeded industry standards for preliminary estimates.

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