Which of the following is NOT a type of publication management document?

A specification sheet, while it provides important information about a product's attributes and functionalities, is not classified as a publication management document. Publication management documents have specific roles related to the maintenance, operation, and modification of equipment.

Technical manuals serve as comprehensive guides that detail operational procedures, maintenance practices, and troubleshooting methods. Modification instructions are critical for communicating changes to existing equipment or procedures that must be carried out to enhance functionality or address issues. An inventory ledger plays a vital role in tracking the stock and usage of equipment, ensuring that all resources are accounted for and managed effectively.

In contrast, a specification sheet does not fit into this category because it primarily focuses on detailing specifications rather than managing the publication or documentation of procedures and practices.