Amadi, A I and Higham, A (2019) Putting context to numbers: A geotechnical risk trajectory to cost overrun extremism. Construction Management and Economics, 37(4), pp. 217-237. ISSN 01446193
Abstract
The study investigates the cause of the unusually high cost overruns experienced in highway project delivery in the tropical wetland setting of the Niger Delta region of Nigeria. An empirical profiling of cost overrun research reveals the predominance of mono-method studies, all of which are underlain by positivism. The study argues that such positivist philosophies, although methodologically valid, cannot adequately provide in-depth understanding of the contextual cost overrun drivers in highway organisations. Using a mix of methods, the paper examines the contribution of geotechnical risks to the extreme cost overruns experienced on Niger Delta’s highway projects, and demonstrates the relevance of context in cost overrun research. Adopting a geotechnical narrative, data sourced from 61 highway projects along with 16 interviews conducted with highway agencies in the region is analysed. The results of the analysis identified that poor project governance and procurement practices, have inhibited the competent management of geotechnical risk, creating a propensity for extreme cost overruns on highway projects. The study submits the phenomenon of cost overruns in public infrastructure projects is underlain by a complexity of contextual social constructs, which would have been overlooked in positivists studies. Cost overrun research, therefore, needs to be contextually and numerically anchored.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | context; cost overruns; highway projects; mixed methods; social constructs |
| Index terms: | mixed method, public infrastructure, interview, philosophy, agency, Nigeria, Niger Delta, complexity, cost overrun, narrative, highway construction, positivism, governance |
| Subjects: | business, infrastructure and transport systems, philosophical studies, financial and cost management, sociology, civil engineering, Geography, physical geography and landforms, philosophical concept, systems engineering, data collection methods, qualitative and interpretive research |
| Topics: | Engineering Principles, Research Practice, Governance, Cost Management, Geographical Context |
| Descriptive scope: | 4 PCTE |
N.B. Descriptive scope is a count of how many of the five facets of empirical research are indicated by the words used in title, abstract and keywords. It is not intended as a judgement on the research; merely a count of the kind of word we would expect to indicate Phenomenon, Concepts, Theoretical framing, Empirical techniques, Analytical techniques. If all five are present, then a code of “5 PCTEA” will indicate this. If you feel the coding for this record is questionable, we welcome discussion around the terms we matched or the way we categorized them. The facet you would expect may not be coded, or a facet may be coded inappropriately. This can also bear on a larger question, of which facets should be treated as defining in construction management research. Please get in touch, and we will look at it. More details here