PENA TEKNIK: Jurnal Ilmiah Ilmu-Ilmu Teknik published since March 2016 by the Engineering Faculty, Universitas Andi Djemma (Unanda) Palopo. Published twice a year in March and September. Contains writings raised from research results and contemporary essays of engineering sciences. The articles published in PENA TEKNIK: Jurnal Ilmiah Ilmu-ilmu Teknik are going through a double-blind peer-review process. Hence, the decision on whether the scientific article is accepted or not, will be the Editorial Board’s right based on the peer reviewer's recommendation. Please read and understand the author's guidelines for the preparation manuscript. The author who submits a manuscript to the editors should comply with the author's guidelines and template. If the submitted manuscript does not comply with the guidelines or using a different format, it will be rejected by the editorial team before being reviewed. The editorial team will only accept a manuscript that meets the specified formatting requirements.