This document discusses different types of formal reports and provides guidance on writing them. There are three main types: informational reports present results, analytical reports present results and draw conclusions, and recommendation reports also make recommendations based on conclusions. Recommendation and feasibility reports aim to answer questions about problems and solutions. The document outlines steps for preparing each type of report, including defining the problem, researching options, drawing conclusions, and making recommendations. It also provides questions to consider and elements to include in different report sections, such as the introduction, body, front matter, and back matter.