Review article

The article presents the research results of the Department of land transport-technological machines of the St. Petersburg State University of Architecture and Civil Engineering in the field of optimization of the transport and technological machines` park, providing not only investment of the enterprise`s own assets to updating of the machine park, but also the use of leasing and loan mechanisms for acquisition of the equipment. The technique described in the article is based on application of linear programming methods. It features the following: accounting of the technical condition of machines characterized by dependability rate; accounting of cost and reliability of the acquired equipment (both the new and the old one); application of capital repair for increasing the level of technical condition of machines; possibility of selling the machines of certain service life; the write-off of the old equipment at achievement of the minimum allowed level of technical condition; carrying out optimization of the age structure of the machine park to the maximum to the production capacity, minimum of capital investments, profit maximum, the set reliability level, a payback period. Realization of the technique is performed in the Excel environment program, and some calculation examples illustrated with schedules are submitted.