Quality Control (QC): Performing inspection operations AFTER the product is manufactured to ensure that defective product does not reach the customer.
Quality Assurance (QA): Building quality into the manufacturing operation to either PREVENT defective products (Poka Yoke)* from being produced, or to DETECT a defective product (JIDOKA)* and eliminate the possibility from producing a second defect.
Where should you be focusing your efforts?
