Their fields are different.
QC means process quality control.
Quality inspector : for raw materials, semi-finished products, finished products quality inspection. Raw materials called incoming inspection, semi-finished products called inspection or called semi-finished product inspection, finished product inspection after passing, the product will be able to release the shipment. If the medical device industry product quality control personnel, you can call the quality inspector, can also be called quality control.
Laboratory: generally chemical testing operators, chemical testing, including raw materials, semi-finished products, finished products. Laboratory technician is generally only for chemical products, such as: pharmaceuticals, biological reagents, chemical reagent industry, the need for frequent chemical testing of products, product testers is the laboratory technician.
Quality control: generally speaking, is the quality inspector, the general name of the laboratory, quality inspectors, laboratory technicians to do the work is part of product quality management.
QC: business management terminology, is "quality management", "quality management" for short, refers to product quality control behavior, but also refers to the quality control jobs, or quality inspection personnel, according to the stage of the production process QC is divided into: IQC (Incoming Quality Control, meaning incoming quality control), IPQC (In Process Quality Control, meaning manufacturing process), IPQC (In Process Quality Control), IPQC (In Process Quality Control, meaning incoming quality control). Quality Control, meaning the manufacturing process quality control, OQC (Outgoing Quality Control, shipping quality control) and so on.