PENA TEKNIK: Jurnal Ilmiah Ilmu-Ilmu Teknik Volume 6 Number 2, published in September 2021, consists of 5 manuscripts covering engineering fields such as informatics engineering, materials engineering, road & transport engineering and environment. All manuscripts come from 5 affiliates throughout Indonesia, namely Universitas Andi Djemma, Institut Teknologi Sepuluh November, Universitas Muslim Indonesia, Universitas Brawijaya, Universitas Hasanuddin. 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.