The Main Body is the core of your document, housing your methodology, experimental data, and technical arguments. Because engineering reports can be incredibly dense, the Chicago Manual of Style (CMOS) utilizes a specific hierarchy of headings to keep information organized and readable.
Chapters & Parts: Organizing large-scale research into logical divisions.
Heading Hierarchy: Mastering the 5-level system for nested technical data.
Visual Data: Correctly labeling, placing, and sourcing Tables and Figures.