By analyzing the impacts of the ISO 9001 Quality management systems, on each of the primary activities of the value chain, it has been found that the new edition of the standard plays a role in each. Compared with the previous edition, the impacts in decreasing order are as follows : Check-up after discharge (100 %), Hospital discharge (85.19 %), Hospitalization (83.33 %), Treatment (65.15 %), Diagnosis (57.58 %). As can be seen from Table 6, standards have important impacts on the main indicators chosen in the evaluation.