SYED MUHAMMAD SHAKIR BUKHARI; REHMAN AKHTAR. IMPROVEMENT OF QUALITY AND WASTES CONTROL OF SOAP MANUFACTURING USING SIX SIGMA ANALYSIS. Policy Research Journal, [S. l.], v. 2, n. 4, p. 727–737, 2024. Disponível em: https://policyrj.com/1/article/view/123. Acesso em: 5 nov. 2025.