ISO defines as a group of operations, activities, or tests that should be done in a definite way to achieve the required quality for the final products.
In construction projects, the final product is a properly- functioning building or structures. The first step in quality control is to define the level of supervision in all the project phases, ensuring every part of the project is performed properly according to the required specifications. The design, execution and the use of the buildings and structures are to be rendered as compatible as possible with the project specifications.
Note that quality control is a responsibility of the projectdelivering organization ast all levels, from the manager on down. In practice, the construction managers and the department head have the designated responsibility for quality control.