What is the only authorized medium for directing modifications of systems/equipment?

The only authorized medium for directing modifications of systems or equipment is a technical directive. A technical directive serves as an official document that outlines specific changes to be made, ensuring that all modifications are carried out systematically and in compliance with established processes. It provides clear instructions and details related to the scope, implementation, and requirements of the changes, which is essential for maintaining consistency and quality within engineering practices.

While other options, such as funding proposals, management reports, and contract amendments, may involve discussions or approvals related to changes, they do not specifically serve the purpose of formally directing equipment or system modifications. A funding proposal may seek financial resources for changes, but it does not dictate the technical aspects or implementation process. A management report provides insights or summaries of operations but lacks authority for directing changes. Similarly, a contract amendment may alter terms or conditions of a contract but does not directly convey technical instructions necessary for modifications. Thus, the technical directive stands out as the definitive medium for guiding engineering changes.