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The Independent Design Verification Engineer (DVE) plays a vital role in supporting local authorities to meet their statutory duty under internal planning acts or strategic planning programs. Mainly appointed to verify compliance of the Contractor’s design scope of work with the Employer’s requirements, the DVE ensures high standards of design, using objective criteria and an impartial evaluation process. Above all, while the designer must remain responsible for the design, the reviewer must be satisfied with the compliance of the design with principles and assumptions, along with the adequacy of the functional and safety targets of the project [1]. In many countries the DVE in civil and transport industry impacts on the life-cycle of a project in a relevant way: primarily by allowing the supervision of the global coherence of the design and the technical feasibility of the work, its operation and maintenance, avoiding or minimizing variation of the works. In Italy, for the same reason, the Design Verification is mandatory by law in contracts for public works - as per Leg. Decree 50/2016 art. 26. The purpose of this paper, indeed, is to make clear how the DVE increases confidence in the “constructability” of the design and hopefully reduces the costs associated with it. The economic impact of the DVE on each stage of the design chain and how it enables the improvement of the management of works will be discussed. As an example, the appraisal framework of Line 3-Riyadh Metro Project will be presented, in the light of the verification procedure, highlighting why a longer relationship of trust, reliability and strong communication between the involved parties is reached, thanks to the continuous support and interface of the independent engineer with the project’s stakeholders. Finally, as outcomes of the consolidated expertise of Italcertifer in managing DVE services, an analysis on how a design error affects time and costs will be given. |
