Hanif, H; Khurshid, M B; Lindhard, S M and Aslam, Z (2016) Impact of variation orders on time and cost in mega hydropower projects of Pakistan. Journal of Construction in Developing Countries, 21(2), pp. 37-53. ISSN 1823-6499
Abstract
The occurrence of variation orders (VOs) in the construction industry is a regular trend all over the world. Hydropower projects are no exception, and it is difficult to find a hydropower project in Pakistan that does not experience VOs. The current research investigates the causes and impacts of VOs in mega hydropower projects using case studies of three mega hydropower projects in Pakistan. The results illustrate that errors and omissions in design, changes in scope and changes in design were among the three top contributing factors to VOs in hydropower projects that resulted in time and cost overruns. Because of VOs, the time overrun is 20%, and the cost overrun is 31% with respect to the planned time and cost of the project. Based on this research, the study recommends measures to curb the causes and impacts of VOs to optimise the construction process of mega hydropower projects.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | cost overrun; mega hydropower projects; Pakistan; time overrun; variation order |
| Index terms: | mega hydropower project, Pakistan, variation, construction process, time overrun, hydropower project, case study, cost overrun, construction industry |
| Subjects: | financial and cost management, data collection methods, construction type, project controls, building construction, industry analysis, Geography, contractual condition |
| Topics: | Time Control, Contract Administration, Site Management, Construction Technology, Research Practice, Geographical Context, Cost Management |
| 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