This Feb. 4, 2013, photo illustration in Manassas, Va., shows a Colt AR-15 semiautomatic rifle, a Colt .45-caliber semiautomatic handgun and a Walther PK380 semiautomatic handgun and a copy of the ...

Quality control is a process by which a business ensures that product quality is maintained or improved. Learn whether quality control is a career option for you.