IMPROVEMENT OF PRODUCT QUALITY THROUGH SIX SIGMA AND FUZZY MARKETING MIX APPROACHES. Jurnal Teknologi Industri Pertanian, [S. l.], v. 31, n. 1, p. 1–11, 2021. DOI: 10.24961/j.tek.ind.pert.2021.31.1.1. Disponível em: https://journal.ipb.ac.id/jurnaltin/article/view/35863. Acesso em: 24 dec. 2025.