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Analysis of Design-Build Procurement Activities Durations for Highway Projects
The design-build (DB) method is being used at increasing rates for delivering highway projects in the United States. Benefits of adopting DB rather than the traditional design-bid-build (DBB) method have been identified by several studies that measured performance of projects delivered with DB as opposed to DBB. The majority of these studies support the widely-held belief that an owner can achieve a schedule advantage by adopting DB for delivering its projects. While these studies analyzed the duration of DB projects after a contract has been awarded, there is a lack of information on DB procurement activities' durations. This paper reports preliminary findings from a study that is collecting and analyzing data on procurement schedule durations and project characteristics to identify factors affecting duration of DB procurement and effect of duration on project success. Based on data of nineteen DB highway projects, the authors provide descriptive statistics on duration of DB procurement activities. Findings show that project size measured by contract dollar amount affects the duration of DB procurement activities. The analysis of nineteen project data shows that procurement durations had no correlation with project cost for projects costing less than $250 million. However, when the projects costing more than $250 million were included in the analysis, a linear correlation between these two variables existed. Future research for determining relationships between project characteristics and procurement duration as well as between procurement duration and project success is also described.
Analysis of Design-Build Procurement Activities Durations for Highway Projects
The design-build (DB) method is being used at increasing rates for delivering highway projects in the United States. Benefits of adopting DB rather than the traditional design-bid-build (DBB) method have been identified by several studies that measured performance of projects delivered with DB as opposed to DBB. The majority of these studies support the widely-held belief that an owner can achieve a schedule advantage by adopting DB for delivering its projects. While these studies analyzed the duration of DB projects after a contract has been awarded, there is a lack of information on DB procurement activities' durations. This paper reports preliminary findings from a study that is collecting and analyzing data on procurement schedule durations and project characteristics to identify factors affecting duration of DB procurement and effect of duration on project success. Based on data of nineteen DB highway projects, the authors provide descriptive statistics on duration of DB procurement activities. Findings show that project size measured by contract dollar amount affects the duration of DB procurement activities. The analysis of nineteen project data shows that procurement durations had no correlation with project cost for projects costing less than $250 million. However, when the projects costing more than $250 million were included in the analysis, a linear correlation between these two variables existed. Future research for determining relationships between project characteristics and procurement duration as well as between procurement duration and project success is also described.
Analysis of Design-Build Procurement Activities Durations for Highway Projects
Migliaccio, Giovanni C. (author) / Shrestha, Pramen P. (author)
Construction Research Congress 2009 ; 2009 ; Seattle, Washington, United States
Building a Sustainable Future ; 229-238
2009-04-01
Conference paper
Electronic Resource
English
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