Quality Assurance vs Quality Control

According to the American Society for Quality (ASQ), the two terms are defined as:

Quality Assurance is the planned and systematic activities implemented in a quality system so that quality requirements for a product or service will be fulfilled, while Quality Control is the observation techniques and activities used to fulfill requirement for quality.

Comparison Chart of Quality Assurance and Quality Control

Quality AssuranceQuality Control
Seeks to measure the processes and systems in order to reduce defective productsSeeks to measure the number of quality of the final products.
Often used by management to make decisions on process improvementIt is often used to accept or reject products, or for payment.
Focuses on preventing defectsFocuses on identifying defects
Managerial toolCorrective tool
Process OrientedProduct oriented
Defines StandardsEnsures Standards are followed
Sets methodologiesEnsure methods are followed
Everybody’s responsibilitySpecific Teams responsibility