Overruns in Transportation Infrastructure Projects
Transportation infrastructure projects are prone to cost and schedule overruns. At the time of contract award, a construction contingency budget is often used to accommodate for unplanned events such as scope changes. Recent empirical research has shown that rework during construction as a result of...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
Taylor & Francis Group
2014
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| Online Access: | http://hdl.handle.net/20.500.11937/8114 |
| _version_ | 1848745561031704576 |
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| author | Love, Peter Sing, Michael Wang, Xiangyu Irani, Z. Thwala, D. |
| author_facet | Love, Peter Sing, Michael Wang, Xiangyu Irani, Z. Thwala, D. |
| author_sort | Love, Peter |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Transportation infrastructure projects are prone to cost and schedule overruns. At the time of contract award, a construction contingency budget is often used to accommodate for unplanned events such as scope changes. Recent empirical research has shown that rework during construction as a result of design changes, errors and omission are the major contributors of overruns in projects. The statistical characteristics of rework, and cost and schedule overruns that are experienced from a project’s contract award for 58 Australian transportation infrastructureprojects are analysed. Theoretical probability distributions are fitted to the rework, cost and schedule overrun data. Goodness of fit tests are used in conjunction with probability-probability (P-P) plots to compare the sample distribution from the known theoretical distribution. A Generalised Logistic probability density function is found to describe the behaviour of cost-overruns and provides the best overall distribution fit. The best fitting distribution for schedule overruns and rework data were the Four Parameter Burr and a Johnson SB distribution, respectively. Thedistributions are used to calculate the probability of rework, cost and schedule overruns being experienced. A case illustration is presented and discussed to demonstrate how the derived probabilities may be utilised in practice. |
| first_indexed | 2025-11-14T06:19:19Z |
| format | Journal Article |
| id | curtin-20.500.11937-8114 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T06:19:19Z |
| publishDate | 2014 |
| publisher | Taylor & Francis Group |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-81142017-09-13T14:37:00Z Overruns in Transportation Infrastructure Projects Love, Peter Sing, Michael Wang, Xiangyu Irani, Z. Thwala, D. Transportation infrastructure projects are prone to cost and schedule overruns. At the time of contract award, a construction contingency budget is often used to accommodate for unplanned events such as scope changes. Recent empirical research has shown that rework during construction as a result of design changes, errors and omission are the major contributors of overruns in projects. The statistical characteristics of rework, and cost and schedule overruns that are experienced from a project’s contract award for 58 Australian transportation infrastructureprojects are analysed. Theoretical probability distributions are fitted to the rework, cost and schedule overrun data. Goodness of fit tests are used in conjunction with probability-probability (P-P) plots to compare the sample distribution from the known theoretical distribution. A Generalised Logistic probability density function is found to describe the behaviour of cost-overruns and provides the best overall distribution fit. The best fitting distribution for schedule overruns and rework data were the Four Parameter Burr and a Johnson SB distribution, respectively. Thedistributions are used to calculate the probability of rework, cost and schedule overruns being experienced. A case illustration is presented and discussed to demonstrate how the derived probabilities may be utilised in practice. 2014 Journal Article http://hdl.handle.net/20.500.11937/8114 10.1080/15732479.2012.715173 Taylor & Francis Group restricted |
| spellingShingle | Love, Peter Sing, Michael Wang, Xiangyu Irani, Z. Thwala, D. Overruns in Transportation Infrastructure Projects |
| title | Overruns in Transportation Infrastructure Projects |
| title_full | Overruns in Transportation Infrastructure Projects |
| title_fullStr | Overruns in Transportation Infrastructure Projects |
| title_full_unstemmed | Overruns in Transportation Infrastructure Projects |
| title_short | Overruns in Transportation Infrastructure Projects |
| title_sort | overruns in transportation infrastructure projects |
| url | http://hdl.handle.net/20.500.11937/8114 |