BAIDOO, F.; SERVO, J. B. Lean and Six Sigma Improvement Concept: Automobile After-Sales Service Delays on Customer Satisfaction in Ghana. AFRICAN JOURNAL OF APPLIED RESEARCH, [S. l.], v. 3, n. 1, p. 121–134, 2017. Disponível em: https://www.ajaronline.com/index.php/AJAR/article/view/204. Acesso em: 29 apr. 2024.