A specification is defined as a list of tests, references to analytical procedures, and appropriate
acceptance criteria which are numerical limits, ranges, or other criteria for the tests described.
It establishes the set of criteria to which a new drug substance or new drug product should
conform to be considered acceptable for its intended use. "Conformance to specifications"
means that the drug substance and / or drug product, when tested according to the listed
analytical procedures, will meet the listed acceptance criteria. Specifications are critical
quality standards that are proposed and justified by the manufacturer and approved by
regulatory authorities as conditions of approval.