What is the relationship between contracting and bidding?

Bidding is the process of determining the winning bidder or general contractor, and contracting is contracted from the general contractor through subcontracting or labor subcontracting.

1. Contracting generally refers to general contracting. Under normal circumstances, the general contracting of the construction unit is to bid to the employer or the employer, obtain the project through bidding, and then contract it to other companies of different professions or types. Bidding is mainly to formulate and modify the organizational structure of power and functional responsibility, and establish a dual-track interactive and vertical and horizontal information exchange system. Predict the personnel demand, make the personnel investment plan, and make assumptions about the required management policies and plans. The employer shall divide the construction project that should be completed by one contractor into several parts and entrust several contractors to undertake it.

2. The construction unit (Party A) prepares the bidding documents for the project bidding, and the construction unit also prepares the bidding documents for the bidding competition. Finally, Party A selects the winning bidder for the general contracting of this project, and the winning construction unit is the general contracting unit of this project. The general contractor may subcontract its sub-projects or sign labor subcontracting contracts according to the type of work, but the main project must be undertaken by the general contractor and may not be subcontracted. The general contractor also has the right to prohibit subcontractors from subcontracting themselves. This is the difference. Bidding is the process of determining the winning bidder or general contractor.

3. Contracting refers to the project subcontracted by the general contractor or labor service. The contracting mode is also called "contracting mode", "contracting mode" or "outsourcing mode". Refers to the construction method that the construction unit entrusts the construction and installation enterprise to carry out the basic construction project. In order to clarify the rights and responsibilities of both parties and facilitate the division of labor and cooperation, the construction unit must sign a construction contract (or agreement) with the construction unit. In the contracting-out relationship, the responsibility of the contracting-out unit is to provide the approved design drawings, budget estimates and project planning documents, handle the construction permit, and provide the construction technical data, materials, equipment and necessary construction conditions in time; Handle the project settlement in time, inspect and supervise the project progress and quality, and organize the project completion acceptance.

The contractor's responsibility is to carry out the construction in accordance with the approved design documents, technical specifications for construction acceptance and requirements of the construction contract, so as to ensure the quality and progress of the project.