QUALITY ANALYSIS OF GOODS DELIVERY SERVICE USING SIX SIGMA APPROACH IN PT. KAMADJAJA LOGISTICS SURABAYA. Tibuana : Journal of Applied Industrial Engineering, [S. l.], v. 3, n. 02, p. 58–71, 2020. DOI: 10.36456/tibuana.3.02.2565.58-71. Disponível em: https://jurnal.unipasby.ac.id/tibuana/article/view/2565. Acesso em: 4 jun. 2026.