This report analyzes the determinants of ISO 9000 adoption and its subsequent impact on firm performance, utilizing data from 5717 industries, of which 460 are ISO 9000 certified. The study compares certified and non-certified firms across various factors including industry type, company age, employee education levels, and financial metrics such as sales, profit, assets, and return on investment. The research employs frequency distribution, descriptive statistics, t-tests, and ANOVA to identify significant differences and correlations. Key findings reveal that software, specialized technology services, and R&D firms exhibit higher certification rates. The report concludes that the number of employees, particularly those with higher education, and company age are crucial determinants of ISO 9000 adoption. Furthermore, significant differences were observed in sales, profit, assets, equity, and returns between certified and non-certified firms, suggesting a positive impact of ISO 9000 certification on financial performance.