Quality assurance (QA) can be defined as the business processes in place that guide safe manufacturing and design of products. QA creates the guardrails that the final product must be evaluated against, and includes activities such as documentation, audits, and supplier management. Quality control (QC) can be defined as the test procedures used to determine that the quality assurance processes have created a safe end product. QC ensures that the actual finished product is safe for consumers and includes activities such as batch inspection, product sampling, and validation testing.