STUDYING PERFORMANCE OF WATER AND WASTEWATER COMPANY USING THE APPROACH OF EFQM EXCELLENCE MODEL IN GUILAN PROVINCE-IRAN. Singaporean Journal of Business Economics and Management, [S. l.], v. 5, n. (1), p. 51–60, 2016. Disponível em: https://singaporeanjbem.com/index.php/SJBEM/article/view/304. Acesso em: 24 jun. 2026.