This is the fifth article in a series of publications on improving the statistical quality of solving inverse photogrammetry tasks. As a consequence of the algorithms developed before, to improve the statistical quality of the equalization, the possibility of evaluating its accuracy results has become quite obvious and unexpected at the same time. The essence of the methods used to assess the exactness of direct and indirect measurements is described. Their shortcomings are noted. Based on the analysis of the algorithms for correcting, a new, alternative method for evaluating the mentioned results is proposed. Its advantages in comparison with known methods are noted. The main ones are: a unified approach for assessing the accuracy of direct and indirect measurements; a simple computational scheme; the opportunity to assess the precision of each measurement individually; the possibility to calculate the reliability index of each assessment; the ability to use the estimates obtained to control the accuracy of measuring instruments, including establishing their systematic errors. An experimental approbation of an alternative method was performed and comparison was made with the results of evaluations using known methods. The analysis of experimental data enabled definition of the common and distinctive features of the new and traditional technologies for assessing the accuracy of the equalization results.