Quality control (QC) is a process for ensuring that a product meets the required standards. In other words, it is a way of making sure that the products produced by your company are of the correct quality. QC is important because it helps prevent manufacturing defects and ensure that the products produced are fit for their purpose. There are many different QC techniques that you can use. However, the most appropriate technique will depend on the products you manufacture and the nature of the manufacturing process.