The organization or organizational structure is the system or process which helps in achieving the goal. This organization helps the manager to relate tasks to people and to people and to other agencies in order to achieve an economical and timely completion of project.

Organization is the machinery through which coordination is brought about between the administration and the management.

The different types of organization are:

1. Functional Organization
2. Line Organization
3. Line & Staff Organization
4. Matrix Organization.

Line and Staff Organization:

1. This type of organization has worked successfully in the manufacturing industries.
2. Many construction companies evolved from a functional organization to a line and staff organization as growth required additional management strengths.
3. As the name indicates, this organization is a combination of line and functional organization.
4. The staff responsibility is carried out by the functional specialists with their knowledge and experience, while the line authority maintains discipline and stability in the organization.

Advantages:

1. Good combination of specialist services with the project construction team.
2. More job opportunities are provided.
3. The project will be executed with better quality.
4. The line personnel can devote their entire time to achieve their targets of the project.
5. The staff personnel carryout all the specialized work due to their skills and experience.

Disadvantages:

1. Possibilities of conflict between line staff and functional staff.
2. Staff personnel do not have direct authority to enforce their decisions.
3. Overhead costs will increase due to hiring the services of the specialized staff personnel.