Quality Control is best defined as

• A. A verification process conducted by the buyer at random
• B. A system to ensure the production of uniform materials that meet required specifications through periodic inspection. Producer's responsibility.
• C. A general safety review of construction sites
• D. A vendor performance rating system

Answer: (B)

Quality control is an internal, process-driven approach to keep produced materials within specified limits, with the producer responsible for making sure procedures, testing, and adjustments during production keep every batch uniform and compliant with the specs. This proactive effort ensures that the material that leaves the plant is consistently within tolerance, rather than relying on outside checks after the fact.

That's why this definition fits best: it emphasizes the producer's responsibility and the ongoing system of testing and adjustments designed to produce uniform materials that meet required specifications. The other options describe external verification by the buyer, a general safety review, or supplier evaluation, none of which capture the in-house, process-oriented focus of quality control for materials.

In asphalt practice, this means calibrating equipment, controlling aggregate grading and binder content, monitoring moisture, and performing in-process tests to ensure each lot meets density, air voids, and specification limits before it’s approved for use.