The Effect of Applying the DMAIC Model for Continuous Improvement in Reducing Supply chain risks : an analytical study of the opinions of a sample of managers in the General Company for the Pharmaceutical Industry and Medical Appliances / Samarra. NTU journal for Administrative and Human Sciences (JAHS), [S. l.], v. 3, n. 3, p. 117–137, 2023. DOI: 10.56286/ntujahs.v3i3.557. Disponível em: https://journals.ntu.edu.iq/index.php/NTU-JMS/article/view/557.. Acesso em: 9 apr. 2025.