Use of the PDCA cycle to improve quality and increase productivity in a multinational in the Manaus industrial pole. Research, Society and Development, [S. l.], v. 10, n. 13, p. e524101321609, 2021. DOI: 10.33448/rsd-v10i13.21609. Disponível em: https://rsdjournal.org/rsd/article/view/21609. Acesso em: 5 dec. 2025.