NSHIRIM, Ekechi Sixtus; NWAGWU, Urenna. Integrated Approach for Process Improvement: Value Engineering, Lean Methodology, SIPOC, and Value Stream Mapping. International Journal of Applied and Natural Sciences, [S. l.], v. 1, n. 1, p. 58–66, 2018. DOI: 10.61424/ijans.v1i1.20. Disponível em: https://bluemarkpublishers.com/index.php/IJANS/article/view/20. Acesso em: 21 apr. 2026.