phased preservation

n. an approach to protecting material from damage, deterioration, or destruction that optimizes limited resources and establishes priorities for treatment of the collection as a whole over time


Originally termed phased conservation, this concept was first introduced by Peter Waters at the Library of Congress in the early 1970s after his work on the Florence flood of 1966. The term phased conservation continued to be used interchangeably with the term phased preservation, which is more common in recent usage. A phased preservation approach can be used for archival functions such as collection maintenance, disaster planning, and implementing environmental controls.