What is the difference between a design change and a visa?

Design changes are issued by the design institute, and visas are generally issued by Party A and the supervision unit.

Design change is generally the modification of the original design by the owner or design institute; Engineering visa is a written document that the construction unit confirms the increase of engineering quantity caused by design change according to the contract requirements.

Extended data:

Design change means that the design unit adjusts according to the requirements of the construction unit, or modifies, perfects and optimizes the original design content. Design changes shall be issued in the form of drawings or design change notices.

Changing the construction time and sequence of related projects is a design change. The project price change report is put forward by the contractor. The contractor shall change the construction organization design during the construction process, which shall be approved by the owner and the supervisor.

According to the contract, the responsibility events involved in the construction process other than the contract price are generally certified by the representatives of both parties to the contract (note: at present, they are mostly embodied in the form of technical verification sheets and business contact sheets).

Engineering visa refers to the supplementary agreement reached by the two parties to the construction contract on cost compensation, extension of construction period and compensation for losses caused by various reasons according to the contract.

References:

Baidu Encyclopedia: Design Change

Baidu Encyclopedia: Engineering Visa