Various items of data collected at different process steps are associated on production sites where traceability is hard to conduct. A quality control apparatus controls a manufacturing process in order to manufacture products of predetermined quality, including a data storing part which collects measurement data measured by multiple devices disposed in a manufacturing process and stores the collected measurement data along with measured time or collected time; and a scheduler which associates the measurement data of the devices with each other in consideration of dead time generated between the devices at measured time or collected time.