The features of the technique are considered to ensure the security of control and diagnostic information about technological processes is carried out. As an example, a theoretical and experimental assessment of the component realizing this technique is fulfilled. The component of elimination of incompleteness and inconsistency of data analysis (within the framework of the system of their intelligent analytical processing) is analyzed. This component is assessed in terms of expert knowledge and judgments about the quality of software, based on formulated and substantiated quality indicators, taking into account the functional and other requirements for this component. The generalized integral quality indicator and the general quality class of the component are determined.