V. M. Kolbanov ,   V. G. Mednitskii Journal of Computer and System Sciences Intrnational , Vol.37 No.1 , 01.1998 , p. 132-136, language: английский ISSN 1064-2307  Аннотация This paper analyzes possible methods of formalization of processes of changing manufacturing structures. The main result consists in the construction of a mathematical description of this problem in a certain class of nonlinear problems of optimal control with mixed constraints (including phase variables and control variables).  Ключевые слова production conversion, optimal control, mathematical programming