SOFIYANURRIYANTI; AZWANDA; MAHMUD BASUKI; MOH. AINUL FAIS; SILVANA MOHAMAD. Improvement of Songkok Production Process Through Defect Analysis Using Seven Tools and Failure Mode and Effect Analysis (FMEA). Jurnal Inotera, v. 11, n. 1, p. 118-128, 4 Mar. 2026.