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Dharmapuri Tirumala, R, Dangol, N, Tiwari, P and Vaz-Serra, P (2021) Comparative analysis of outcomes under PPP and traditional modes of delivery: a study of schools in Melbourne. Construction Management and Economics, 39(11), 894–911.

Ertuğrul, H M and Pirgaip, B (2021) The nexus between construction investment and economic development: evidence from MENA countries. Construction Management and Economics, 39(11), 932–47.

Guo, W, Lu, W, Gao, X and Cai, F (2021) How interpersonal ties affect interorganizational trust in construction projects: role differences and cross-level effects. Construction Management and Economics, 39(11), 912–31.

Nguyen, P H D, Tran, D Q and Bypaneni, S P K (2021) Exploring the impact of project size on design-bid-build and design-build project delivery performance in highways. Construction Management and Economics, 39(11), 879–93.

  • Type: Journal Article
  • Keywords: Highway project delivery methods; cost performance; schedule performance; construction intensity; project size;
  • ISBN/ISSN: 0144-6193
  • URL: https://doi.org/10.1080/01446193.2021.1993289
  • Abstract:
    The highway construction industry has been increasingly using design-build (D-B) project delivery because of its documented benefits. Only limited studies, if any, have compared D-B and traditional design-bid-build (D-B-B) project performance based on the size of projects. The existing gap was addressed by investigating the cost growth, schedule growth, and construction intensity of highway projects delivered under D-B-B and D-B with the project sizes ranging from $2 million to greater than $100 million. These projects were collected from six state departments of transportations in the U.S. with mature D-B programs. Several statistics tests including t-test, Welch’s test, and Mann–Whitney U-test were used to analyze 3888 completed highway construction projects. The results show that D-B produced a lower cost growth than D-B-B in the project size of over $10 million while D-B-B projects had lower cost growth than D-B projects in the project size from $2 million to $10 million. D-B projects also produced less schedule growth than D-B-B projects across all groups of project size. D-B-B projects had a faster work pace than D-B projects in the project size from $2 million to $10 million. The findings contribute to the project delivery body of knowledge by reporting statistically empirical comparisons between D-B-B and D-B project performance controlled by the project size. The findings may help highway agencies better understand how D-B performs under the different sizes of projects in terms of cost growth, schedule growth, and construction intensity.