A. S. Sizov, Yu. A. Khalin

Now the Russian economy is characterised by priority development of a commodity market and the services, accompanied not less intensive competitive opposition of the enterprises operating in the given market. Efficiency of activity of the enterprises of a commodity market and the services, caused by their competitiveness, depends on set of factors, and, first of all, from ability it is rational to use own advantages and the possibilities which are a basis for working out of strategy on realization of competitive advantages which introduction will promote competitiveness maintenance. In work the approach to an estimation of competitiveness of the enterprise on the basis of the indistinct mathematics is offered, allowing to generate the base of rules consisting from indistinct implication, and on its basis to draw an indistinct logic conclusion on an enterprise accessory to one of competitiveness classes.