PurposeThis study has the main aim of analyzing the influence of six factors on ISO 9001 implementation: Economic Development, Exporting to Europe, Reputation, Competitiveness, Innovation and Business Sophistication. As a complement, a new factor relating to quality by country has been added: the World Quality Scoreboard.Design/methodology/approachHypotheses are proposed that establish a (positive or negative) linear relationship between the diffusion of ISO 9001 and the indicators of the different factors analyzed in each country. The SPSS program was used to evaluate the hypotheses using data from 2009 to 2018.FindingsThe results indicate strong positive relationship for the country's economic development only when countries with low levels of income are considered. For the rest of the variables, the results indicate that their behavior varies according to the degree of development of the countries. When only developed countries are considered, significant and negative correlations are obtained for reputation, competitiveness, innovation and business sophistication, while considering the group of less developed countries, the results are reversed. The new World Quality Scoreboard has the same behavior whereas regarding exports; we did not obtain conclusive results.Originality/valueThis study adds important information on the studying of ISO 9000 phenomenon diffusion/evolution by analyzing the effect of six variables on the degree of implementation of the ISO 9001 standard in different countries. This information is interesting for companies and certification bodies across the world because it allows a better understanding of the reasons and conditions of implementing a quality management system.