Dehghan, R and Ruwnapura, J Y (2014) Model of trade-off between overlapping and rework of design activities. Journal of Construction Engineering and Management, 140(2): 04013043, ISSN 0733-9364
Abstract
An effective and well-known technique for earlier completion of construction projects is to overlap the project activities that normally would be performed in sequence. Overlapping, often called fast-tracking, is inherently risky because it increases uncertainties and can result in more changes and rework. In order to gain maximum advantages from early project completion, a trade-off between benefits and losses of activity overlapping is required. In this paper, a new model has been developed to (1) explain in detail the mechanism and characteristics of design activity overlapping and (2) formulate and discuss design activity overlapping time-cost trade-off. A qualitative research methodology including interviews and focus groups with experts was used to generate and refine the model. This model contributes to the body of knowledge of construction management by demonstrating (1) how to analyze multipath networks through introducing the multi-predecessor effect and (2) how to analyze concurrent overlapping through introducing the cascade effect. The results of this paper can generate insights for further research to solve the overlapping time-cost trade-off and determine the optimum overlapping degree.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | construction management; cost and schedule; fast-track construction; overlapping; rework; time-cost trade-off |
| Index terms: | interview, focus group, rework, methodology, qualitative research, construction project, fast-tracking, body of knowledge, time-cost trade-off |
| Subjects: | knowledge management, operations management, data collection methods, research design and methodology, project controls, production management, quantity surveying, research methods |
| Topics: | Project Management, Research Practice, Information Management, Risk Management, Time Control |
| 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