Thirdness and Text-Organization
The Technical Writing Teacher
Describes a procedure technical writing students can use to test how concerns like segmentation, defining criteria, and paragraph structure may apply to finding an organization for their own texts. Essentially a heuristic, the procedure assumes that a number like three (a control number) is useful in organizing information for any kind of technical text.
"Thirdness and Text-Organization," The Technical Writing Teacher," 13 (1986), 62-70.