the Tennessee Valley Authority

“ Each Branch Chief may use any system of index numbering that will help in orderly filing and cross-indexing. Probably the best method is the simple practice of having each man, while assigned to any particular squad, keep his own set of numbers, starting with No. 1 and breaking them up as required and keeping a record of numbers used, together with the subject of the computation. The system used should make it possible to refer readily to another designer's computations by specific page number. ”

“ All computations that are expected to be used for final design purposes are to be checked by another man. In general the checker should make a completely separate set of computations. As the original figures are the ones to be incorporated in the design or to be used as the basis of further computations, it is unnecessary to go to great refinement in making check computations. ”

“ The head of each design branch (or his Design Production Engineer or other Supervisor as may be authorized) shall be responsible for the orderly making, indexing, and filing of computations. Each supervisor (Squad Boss or other employee supervising the work of others) shall be responsible for clearly indicating the status of computations made by the men under his supervision
All computations should be kept for the duration of the design work on the whole project. ”