This document provides guidance on writing effective reports. It begins by defining a report as an assessment of a situation or results from data analysis that is precise, concise and succinct. The key stages in report writing include preparation, planning, writing, and proofreading/editing. When writing, it is important to set the structure with logical sections like a title page and contents, and to write the main body before other elements. The executive summary should summarize the central theme and main findings. Proofreading ensures there are no errors and the report is clearly structured and argued.