5. Conclusion

Thus, the concept of decision-making for evaluation of the human factor influence on the STS is presented; this concept is based on the analysis of the action effectiveness at each stage of the operator's activity and the priority levels of the operator's actions considering the known requirements to the PIQ content.

It is obvious that each type of the operator's activity corresponds to its own specific PIQ set, which determines the performance quality of professional functions.

In order to define a necessary set of PIQs, it is required to make a profound analysis of the professional activity, as each type of the operator's activity has its own peculiarities conditioned by the technology (work types and the work process elements, different work modes, shifts, different intensity of work, different levels of automation within the production process, etc.).

According to the proposed experiment model, special tests or test sets can be selected for each stage of the operator's activity, and they help to characterize the corresponding capabilities of a testee.

Application of different tests provides an opportunity to effectively simulate most types of the operator's activity in different environments of a human-operator, when different factors of the ambient environment affecting them, and to obtain quantitative and qualitative characteristics of their working capacity.

The special feature of the proposed model is application of the fuzzy analysis already at the stage of testing and application of the outcomes of one AT for evaluation of a number of PIQs. The proposed model, in general terms, represents the functional dependence of the operator's vocational aptitude index on the PIQ development level, while these PIQs are defined by the outcomes of testing on the base of fuzzy methods.

The feature of novelty of the developed model of the vocational aptitude consists in the integral evaluation of the vocational aptitude in a hierarchical system class; it makes it possible to take into consideration the system of interconnections between the PIQs and the AT outcomes, to improve the completeness and accuracy of the made decisions, to form quality functional for the training of operational personnel.

The main advantage of the developed evaluation system and the evaluation model is the possibility of the focused training of the certain operator's functions and the development of the certain PIQs that can improve the vocational aptitude indicators. This allows to intensify the training process of the operational personnel and reducing resource and time expenditures for their training.

Thus, it was established that the developed system of the vocational aptitude evaluation can be applied for evaluation of the human factor within research into STSs including elaborated technogenic objects.
