Keywords : facility location with single sourcing, opening and closing of facilities, heuristic, integer linear programming (ILP). Dyan Parardyo S, Yuniaristanto, Bambang Suhardi∗ ∗∗∗ ∗ Corespondence : E-mail : aryo_dp@plasa.com, utan@uns.ac.id, bshardi@uns.ac.id Jurusan Teknik Industri, Universitas Sebelas Maret, Surakarta Performa (2005) Vol. 4, No.2: 52 - 63 Gambar 1. Kerangka Pemecahan Masalah Parardyo, Yuniaristanto, Suhardi - Penentuan Jumlah, Lokasi, dan Cakupan Distribusi… 53