In the article the methods of processing of statistical data about periodic process by the least squares method with usage of Bessel functions and Fourie numbers are analyzed. The simple method for approximation with a choice of the fluctuation period, proceeding from a minimum of the estimated error is offered.
The interpreting of classification methods for nomenclature groups and problem «Make or Buy» by various authors is considered. The application practice of these methods is analyzed. It is came to conclusion, that authors consider these concepts to be applied to micrologistical systems. Variants of application of the listed concepts to macrologistical systems are offered.