Breadboarding for technical writing?

Seven mathematical expressions are presented, with comments, for the guidance of technical writing by engineers and scientists. They determine when to write an interim report, when to write the final report, when to inform the higher echelons, how many extra readers could result from one more revision, what grade to give a revised version, how much reading time increases with increasing article length, and how various factors affect the science-world communication gap. The formulas stem from analogies between communication problems and solved problems in science and are intended to stimulate bread-boarding in technical writing.