The diagnostic enterprise method is a management theory which has since subdivided and complemented with modern methods. This methods were created based on Frederick Winslow Taylor's principles to develop new ways in which companies can change their internal structure without outside help. Some of the techniques bring the managers the advantage to find opportunity areas in the company to correct them without affecting the enterprise development. This methods can be applied without paying a big cost in money, time and training. This method can be applied to almost any enterprise as well as in other countries.