A proposal for USP chapter <1079.4> Temperature Mapping for the Qualification of Storage Areas has been published for comments in the Pharmacopeial Forum, PF 48(5). It will apply to every link in the supply chain, such as manufacturers, wholesale distributors and third-party logistics providers. The new chapter should be viewed in the context of the United States Pharmacopeia's (USP) efforts to build out the <1079> series of chapters on Good Storage and Distribution Practices.