The difference between a unit project and a single project is that a single project has independent design documents and can be constructed independently. After completion, the unit project is an integral part of a single project, which refers to a project with independent design and independent organization of construction, but after completion, it cannot independently exert its production capacity or use efficiency.

The specific division of unit projects and individual projects is

In the same project, the relationship from big to small is single project, unit project, division project and sub-project

A single project is an integral part of a construction project, and it is an independent project with independent design documents, which can independently exert its benefits or production capacity after completion.

A unit project cannot exert its production capacity independently, but it has independent construction organization design and drawings.

Sub-project: the unit project is divided into sub-projects according to the type or main part of the project.

Sub-projects: Sub-projects are divided into several sub-projects according to different construction methods, structures and specifications.