Farhan Syachrony, H. Darmawan, and A. Suwarno, “ANALISIS PENGENDALIAN KUALITAS JASA PELAYANAN DENGAN METODE FAILURE MODE AND EFFECT ANALYSIS (FMEA) PADA TRAVEL UMROH DI PT. XYZ”, JIG, vol. 7, no. 2, pp. 49–56, Aug. 2025.