Quality Control is defined as:

• A. A method for preventing mistakes in production
• B. A marketing term used to describe product quality
• C. A plan to audit suppliers only
• D. A process by which entities review the quality of all factors involved in production

Answer: (D)

Quality control is the ongoing process of evaluating everything that goes into making a product to ensure it meets defined standards. The best choice describes this as a comprehensive activity where entities review the quality of all factors involved in production—materials, equipment, methods, people, and the environment—so that outputs conform to specifications. This fits because QC isn’t only about preventing mistakes (that leans more toward prevention or broader quality assurance) and it isn’t about marketing jargon or auditing just one area like suppliers. It encompasses checking and verifying all elements that affect quality, such as inspecting inputs, monitoring the production process, and testing finished goods to catch defects and ensure consistency.