Defining the number of employees for project realization of ground-based radio engineering flight support means upgrade

Аuthors

Maron A. I.^*, Maron M. A.^**, Lipatnikov A. Y.^***

Higher School of Economics, 20, Myasnitskaya str., Moscow, 101000, Russia

*e-mail: amaron@hse.ru
**e-mail: mmaron@hse.ru
***e-mail: alipatnikov@hse.ru

Abstract

The study relevance is stipulated by the fact that at present the number of projects for ground-based flight support radio engineering means (REFSM) is increasing. The REFSM upgrade represents a project. Such project is associated with a large number of works to be performed. Thus, just one division of the St. Petersburg Center for the of Air Traffic Organization performs technical operation of retranslation stations equipment in the area from Priozersk to Nizhni Novgorod. It is required defining the number of employees for the project completion in the specified time. It should be noted herewith that the same employees ensure operative runability restoring of equipment. The error-free running time of modern REFSM means is tens of thousands hours. It is ensured by both redundancy and technical servicing. A the same time, the defects causing the unit transfer from the operation condition to the fault operable state occur more frequently than the defects leading to inoperability. Such defects require operative elimination since they increase the failure occurrence probability. This problem has not been resolved up to now. Classical methods for queuing systems computing are based on computing probabilities of the system being in various states. They are practically inapplicable due to the dimensionality of the problem under consideration. Simulation methods describe special cases only. They do not guarantee the solution of the problem without analytically found initial approximations to the required number of personnel. The presented article solves the problem by the mean dynamic method. It presents the program for performing computations of the required number of employees in MathCAD Prime. The example of the number of employees computation is given. The proposed method gives practically exact results when the number of units to be upgraded is a couple of dozen or more. In case they are less in number, the obtained number of employees should be refined by simulation. The values obtained by the proposed method herewith will be the initial approximations. The materials of the article are of practical value for the managers of the flight support and communication REFSM services while the upgrading projects planning.

Keywords:

flight supporting ground-based radio engineering means, technical servicing upgrading, project planning

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