What is the DB contracting model and the DB B contracting model?

The D+B contracting model is design + construction general contracting. The D-B-B contracting model is design-bid-build.

The D+B contracting model means that the general contractor undertakes the design and construction of the project in accordance with the contract, and is fully responsible for the quality, safety, construction period and cost of the contracted project.

The most prominent feature of the D-B-B contracting model is that it emphasizes that the implementation of the project must be carried out in the order of D-B-B, and only one stage can only be started after all the other stages are completed.

Extended Materials. EPC is a widely used contracting method in construction activities at home and abroad, which is conducive to clarifying the complex relationships between owners and contractors, survey and design and owners, general contractors and subcontractors, law enforcement agencies and market entities in project construction.

Under the condition of general contracting, after the owner selects the general contractor, the general contractor directly determines the subcontract in the aspects of survey, design, procurement, and project subcontracting, so that the owner no longer needs to implement parallel contracting, which avoids the chaotic state of not distinguishing the main and secondary parties of the contract, and also avoids the complex relationship between law enforcement agencies in the past to supervise multiple market entities in a project.

D+B contracting model: Design-Build (DB).

Mode. D-B-B contracting model: Design-bid-build (DBB) model.

The DB model consists of the EPC (EGIEERIG, in which one entity undertakes all design and construction tasks under a general contract: EGIEER, PROCURE, COSTRUCT acronyms) model;

Also known as the design-build (desig-costruct) model or the sigleresposibility model. In this mode, design and construction methods are integrated.

Extended information: Compared with the traditional contracting model, the EPC general contracting model has the following three basic advantages:

Emphasize and give full play to the leading role of design in the whole process of engineering construction. The emphasis and play of the leading role of design in the whole engineering construction process is conducive to the continuous optimization of the overall scheme of engineering project construction.

2. Effectively overcome the contradiction of mutual constraints and disconnection between design, procurement and construction, which is conducive to the reasonable connection of design, procurement and construction at all stages, and effectively realizes the progress, cost and quality control of the construction project in line with the construction project contract, so as to ensure better investment benefits.

3. The main body of responsibility for the quality of construction projects is clear, which is conducive to investigating the responsibility for project quality and determining the bearer of project quality responsibility.

EPC)

D+B Design – General Contracting for Construction.

This mode of contracting is reflected in Article 24 of the Construction Law: "General contracting of construction projects is advocated, and the dismemberment of construction projects is prohibited." The contracting unit of a construction project may contract the survey, design, construction, and equipment procurement of the construction project to a general contractor at the same time, or may contract one or more of them to a general contractor; However, a construction project that should be completed by one contractor shall not be dismembered into several parts and awarded to several contractors.

However, the specific meaning of domestic general contracting varies from time to time and from place to place. Sometimes it refers to a contractor whose owner signs a construction contract and then subcontracts certain parts of the project; Sometimes it refers to a contractor who has signed a contract with the owner for both design and construction.

Although this model has many advantages, the conditions are too harsh. As far as the current domestic contractors are concerned, only a few have the design, construction and management capabilities required by them. Therefore, if this model is adopted, it is more likely that the design-construction contractor will be jointly bid by multiple units, but if this is the case, it will lose some of the advantages of the original design-construction general contracting model.

D-B-B stands for Design-Bid-Build model.

This is the most traditional project management model. This management model is the most commonly used in the world, and is mostly used in projects financed by the World Bank, ADB, and projects based on the International Federation of Consulting Engineers (FIDIC) contract conditions. Its most salient feature is the emphasis on the fact that the implementation of engineering projects must be carried out in a design-tender-build sequential manner, and that only after the end of one phase can another phase begin.

This model was implemented in China's first World Bank-financed project, the Lubuge Hydropower Project.

The advantage of this model is that it is highly versatile, can freely choose the consulting, design, and supervision party, and all parties are familiar with the use of standard contract texts, which is conducive to contract management, risk management and investment reduction. The disadvantage is that the project will be handed over to the owner after planning, design and construction, and the project cycle is long; The owner's management cost is high, and the initial investment is large; It is easy to give rise to a large number of claims when making changes.

D+B model (design + construction general contracting model).

DB stands for Design-Build model, that is, DBB is the traditional design-bidding-construction method, EPC is design, procurement and construction general contracting, that is, construction-operation-handover.

It refers to the right to finance, invest, build, operate, manage and use the country's infrastructure or industrial projects to the enterprise within a certain period of time after a certain procedure, and the enterprise has the permanent ownership of the project, and the enterprise invests, develops, builds, operates and manages in accordance with the agreement signed with the enterprise, and returns the project to the enterprise at the expiration of the contract period.

The Design-Build (DB) model is also known as the Design-Build model or the Single Responsibility model. In this model, the design and construction methods are integrated, and one entity undertakes all the design and construction tasks according to a general contract. The DB model here includes the EPC (Engineering, Procurement, Construction) general contracting model.

Design-bid-build (design-bid-build; dbb) EPC is an acronym for Engineer, Procure, Construct.

Its Chinese meaning is to be responsible for the design, procurement, and construction of a project, which is similar to the meaning of general contracting. BOT is the abbreviation of build operate transfer in English, which is usually literally translated as "build operate transfer".

The Design-Build (DB) model is also known as the Design-Build model or the Single Responsibility model. In this model, the design and construction methods are integrated, and one entity undertakes all the design and construction tasks according to a general contract. The DB model here includes the EPC (Engineering, Procurement, Construction) general contracting model.

Design-bid-build (design-bid-build; dbb)

EPC is an acronym for engineer, procure, construct.

Its Chinese meaning is to be responsible for the design, procurement, and construction of a project, which is similar to the meaning of general contracting.

BOT is the abbreviation of build operate transfer in English, which is usually literally translated as "build operate transfer".