Quality Control results allow verification of Quality Assurance effectiveness. Independently of your operation size, your company should plan the required Quality Control since raw materials reception, production and final product. What to control, by whom, with what frequency, with what specifications, and with which monitoring resources. Required means required by your company’s experience; or by clients; or by standards; or by regulation; or by competition performance.
Quality Assurance and Quality control are interrelated. Quality Assurance is about how a process is performed or how a product is made, Quality Control is about the inspection aspect.