Design verification consists of conducting, in an integrated manner, a series of activities to check the quality of the design and its compliance with the binding regulations, including urban planning and environmental regulations, as well as the use of good practice in design. These checks, as a rule, proceed in parallel with the actual design process and are bounded by a specific requirement framework of the client which defines the criteria, contents and requirements pursuant to art. 23 paragraph 9 of the Code.

The phases of design verification, review, and feedback take place in agreement with the production manager (RUP)/principal and with the design engineers.
The purpose of the verification is to ascertain the conformity of the chosen design solutions with the specific functional, performance, regulatory and technical provisions for each phase (technical and economic feasibility, detailed design) in relation to the design level for the subsequent validation, carried out pursuant to art. 26 of Legislative Decree 50/2016.
The service can be carried out for the entire design process, or for one or more specific levels of the process itself, according to the specific needs of the administrations, customers, or end users.
Design verification is carried out with the utmost impartiality, independence, competence and reliability by APAVE CERTIFICATION ITALIA with the supervision of Accredia, the certification organization authorized to sign MLAs (Multi Lateral Agreement) at an international level for mutual recognition of certifications.


The objective of design verification is the provision of all the necessary information to the RUP/customer useful for the validation of the design itself.
These objectives can be summarized as follows:

  1. To guarantee the technical, administrative and economic feasibility of the public works, without unnecessarily prolonging the time required resulting from design modifications and additions to comply with the relevant standards after the drafting and completion of the design;
  2. Ensure consistency between:
    • design choices and related technical solutions in the transition between design stages;
    • the technical and technological solutions and the choices adopted also in compliance with the indications of the safety and maintenance plans;
    • compliance with the mandatory and voluntary provisions of law;
  3. Eliminate or reduce:
    • shortcomings and design errors that could lead to cost increases;
    • reservations of the contractor;
    • delays due to planning errors.


The excellence of the services provided by APAVE CERTIFICATION ITALIA is guaranteed by the highly skilled and professional personnel and by the technical experts and specialist consultants who collaborate on a continuous basis with the company. All these resources constitute a dynamic and consolidated network that covers all the specializations required in the spheres of engineering, architecture, and management of public tenders.
The construction and fine-tuning of the tools and operating practices applicable to the verification procedures are based on the in-depth analysis of the processes to be certified, the context, and the objectives and expectations of the administrations, customers, and/or end users.
The lacking or incorrect definition of the features, including technological features, of the work in the design phase leads to a direct and negative consequence: the inability to fully define the performance characteristics of the work and therefore, to compute them correctly.
Frequently, the suspension of works, the changes made during the construction phase, and the reservations of the contractor are caused by the need to solve problems that could, and therefore should have been resolved in the design phase.
Design verification is usually carried out in progress (during the design phases) or at the end (after the preliminary design is complete), and can be extended to the entire control chain.
This verification makes it possible to protect the public administration/principal from liabilities and fiscal damage, in relation to circumstances for which the administration/principal cannot materially guarantee the integrity, coherence, and quality of the design.
The aforementioned guarantee is also applicable to all interventions to be carried out under the construction and project financing regime.

Reference standard
D.Lgs. 50/2016

Implementation of the 2014/23/EU, 2014/24/EU and 2014/25/EU Directives on the awarding of concession contracts, on public tenders and on the tender procedures of entities operating in the water, energy, transport and postal services sectors, as well as for the reorganization of the regulations in force concerning public contracts related to works, services and supplies, published in the Ordinary Supplement no. 10 to the Official Gazette no. 91 of 19 April 2016 - General series.

Read Legislative Decree 50/2016