**Author details**

Dariusz Sala\* and Bogusław Bieda Management Department, AGH University of Science and Technology, Kraków, Poland

\*Address all correspondence to: dsala@zarz.agh.edu.pl

© 2019 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
