Public Project Construction Manager-at-Risk Contracts: Lessons Learned from a Comparison of Commercial and Infrastructure Projects

Gransberg, Nils J.; Gransberg, Douglas D.

doi:10.1061/(asce)la.1943-4170.0000339

Cited by 10 publications

(1 citation statement)

References 12 publications

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“…The winning bid is often the one with the lowest bid submitted to a tender. In the United States, the low bid method is widely utilized to award construction contracts at the price of the lowest responding bid (Gransberg and Gransberg, 2020). A significant variation between the lowest bid (winning bid) and the OEC is problematic for both parties.…”

Section: Introductionmentioning

confidence: 99%

Integrated artificial and deep neural networks with time series to predict the ratio of the low bid to owner estimate

Almohsen,

Alsanabani,

Alsugair

et al. 2023

ECAM

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PurposeThe variance between the winning bid and the owner's estimated cost (OEC) is one of the construction management risks in the pre-tendering phase. The study aims to enhance the quality of the owner's estimation for predicting precisely the contract cost at the pre-tendering phase and avoiding future issues that arise through the construction phase.Design/methodology/approachThis paper integrated artificial neural networks (ANN), deep neural networks (DNN) and time series (TS) techniques to estimate the ratio of a low bid to the OEC (R) for different size contracts and three types of contracts (building, electric and mechanic) accurately based on 94 contracts from King Saud University. The ANN and DNN models were evaluated using mean absolute percentage error (MAPE), mean sum square error (MSSE) and root mean sums square error (RMSSE).FindingsThe main finding is that the ANN provides high accuracy with MAPE, MSSE and RMSSE a 2.94%, 0.0015 and 0.039, respectively. The DNN's precision was high, with an RMSSE of 0.15 on average.Practical implicationsThe owner and consultant are expected to use the study's findings to create more accuracy of the owner's estimate and decrease the difference between the owner's estimate and the lowest submitted offer for better decision-making.Originality/valueThis study fills the knowledge gap by developing an ANN model to handle missing TS data and forecasting the difference between a low bid and an OEC at the pre-tendering phase.

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Section: Introductionmentioning

confidence: 99%