Quality control is responsible for sampling, testing, and release of materials and products. It must be independent of production and have qualified staff and resources to effectively carry out quality control arrangements. Adequate facilities and approved procedures must be in place for sampling, inspecting, testing of starting materials, packaging materials, and finished products. All quality control methods, particularly testing methods, must be validated. Comprehensive records must be kept of all quality control procedures and any deviations investigated. Finished products must meet specifications for ingredients, purity, packaging, and labeling.