The main objective of all quality control specialists is to test the product for its intended use and make sure it performs up to the manufacturer's specifications.
Most specialists have the authority to accept or reject products as necessary. They usually keep a record of problems they find and may send defective products back for repair. In some industries, inspectors may have to repair the products themselves to determine the problems in the manufacturing process. Some specialists conduct controlled testing on products to determine how the products perform in a simulated environment.
Almost all quality control specialists use some type of instrumentation to perform their jobs. Quality control workers may weigh or measure finished products. Some specialists may be required to measure fluid levels, check lubrication, inspect workmanship, or gauge product durability. Those working in the food industry may be required to sample products to determine quality.