Define how quality control can be applied to a subcontractor’s work.

Quality control of a subcontractor’s work begins along with a clear, detailed and precise requirement of the goods needed or the services to be performed. Detailed getting criteria must also be agreed among the parties.

Two fundamental approaches to quality control can be utilized:

•The ‘black box’ approach, there the inputs and outputs through the product are checked to make sure that they conform to requirements; when they do, the buyer is not concerned along with how the product works.

•The ‘white box’ approach, there not only inputs and outputs are checked although also what goes on within.

Additionally, the buyer may wish to notice that the subcontractor works into and conforms to some independent standard for quality management systems, as like ISO9001.