Sahrial Amri, I Wayan Suletra, Fakhrina Fahma ∗∗∗∗ ∗ Corespondence : E-mail : suletra@uns.ac.id, fakhrina@uns.ac.id Keywords : Six Sigma, process stability, process capability, spinning process, CTQ, unevenness yarn. Jurusan Teknik Industri, Universitas Sebelas Maret, Surakarta Performa (2005) Vol. 4, No.1: 1 - 9