This document provides guidance on effective report writing. It defines a report as a statement of the results of an investigation that provides definite information. The document outlines the structure of reports, including sections like the executive summary, discussion, lessons learned, and recommendations. It also discusses planning a report by determining the audience, purpose, and structure. Features of good report writing include being clear, complete, accurate, and impartial. The conclusion emphasizes that reports are useful for keeping records, providing information, indicating status, facilitating research, setting actions, decision making, and building relationships.