Espinoza Martínez, L. S. ., & Sánchez Melgarejo, L. M. . (2016). Materia requirements plan and cost reduction in the production area, company Metals Manufacturing Calessi S.A.C. El Agustino 2015. INGnosis, 2(1), 228–234. https://doi.org/10.18050/ingnosis.v2i1.1989