Model of Trade-Off between Overlapping and Rework of Design Activities

被引:25
作者
Dehghan, Reza [1 ]
Ruwnapura, Janaka Y. [2 ,3 ]
机构
[1] Univ Calgary, Schulich Sch Engn, Ctr Project Management Excellence, Dept Civil Engn, Calgary, AB T2N 1N4, Canada
[2] Univ Calgary, Calgary, AB T2N 1N4, Canada
[3] Univ Calgary, Schulich Sch Engn, Ctr Project Management Excellence, Calgary, AB T2N 1N4, Canada
关键词
Fast-track construction; Overlapping; Time-cost trade-off; Rework; Construction management; Cost and schedule; PRODUCT DEVELOPMENT; INFORMATION; UNCERTAINTY; PROJECTS; TIME;
D O I
10.1061/(ASCE)CO.1943-7862.0000786
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
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. (C) 2013 American Society of Civil Engineers.
引用
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页数:13
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