Optimal review strategy for concurrent execution of design-construction tasks in DB mode

In traditional design-bid-build (DBB) mode, due to the sequential execution of design and construction, the review method of construction documentations is a one-time review at the beginning of the construction phase. However, in design-build (DB) mode, to realize the concurrent execution between design and construction tasks, the review method of construction documentations is multiple reviews during the concurrent execution, and the problem of when and how to review under this review method has not been solved yet. Therefore, dynamic and static decision models are creatively constructed to solve when and how to review. Based on the dynamic decision model, the influence of the execution of the review strategy on the preparation duration, review duration, executable tasks and rework duration during construction was discussed. Based on the static decision model, the influence of design accuracy, construction sensitivity, and review efficiency on the review method under different time ratios was discussed. The research achievements provide operational countermeasures for exploring the principles of developing review strategies in the concurrent execution process from the perspective of quantitative analysis, and also provide directional suggestions for the way of applying concurrent engineering in DB mode.