The present conditions of economic crisis essentially limit the opportunities for the military industry, and the country's industrial potential. The resources allocated for production of the military equipment have been cut. The test specimens of the military equipment are provided in single units. There are no agreed-upon methods for testing of the military equipment by single units. In our case the accuracy rating may be expressed as a percentage of the indication or as a percentage of the full-scale value. The accuracy rating is given as the limit, which the errors will not exceed. The theory is based on the facts, the reliability of which was verified more than once. The given conditions are characterized by a limited number of the experimental test specimens, amount of the power-generating fuel, lubricants, oil, energy, accumulated energy, wear and depreciation charges, and so on. All this to a great extent limits the number and volume of tests of every specimen of military equipment. Evaluation of the engineering and fighting efficiency, maintenance and service properties, statistical acceptance quality control are put into practice by every test-specimen. Processing and treatment of the evaluation results demand application of special instruments. Let us choose such an instrument as the method of a small sample. The use of this method makes it possible to obtain evaluations of the power density function. Experimental data are represented by the following distributions: distribution of the fighting efficiency, distribution of maintenance and service properties. Evaluation of the distribution used under these conditions receive a numerical value (quantity) of the fighting efficiency and operating quality of the test-specimen of the military equipment.