This document summarizes guidelines for developing informal business reports. It discusses the functions and organizational patterns of reports, including informative and analytical reports. Direct and indirect organizational patterns are described. Formats like letter, memo, and manuscript formats are covered. The document also outlines six types of informal reports: information reports, progress reports, justification/recommendation reports, feasibility reports, meeting minutes, and summaries. Steps like determining the problem, gathering data, developing an appropriate writing style, using effective headings, and being objective are recommended for developing informal reports.