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All Journal Industrika : Jurnal Ilmiah Teknik Industri Jurnal Kendali Teknik dan Sains
Setijanen Djoko Harijanto
Universitas 17 Agustus 1945 Surabaya
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Engineering Industrial & Manufacturing Engineering

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Analisis Pengendalian Kualitas Guna Meminimalsir Deffect Dengan Pendekatan Metode Statistical Quality Control (SQC) (Studi Kasus di PT. Romi Violeta Sidoarjo) Akhmad Fatikul Azzam; Setijanen Djoko Harijanto
Jurnal Kendali Teknik dan Sains Vol. 1 No. 3 (2023): Juli : Jurnal Kendali Teknik dan Sains
Publisher : Universitas Katolik Widya Karya Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59581/jkts-widyakarya.v1i3.652

Abstract

PT Romi Violeta Sidoarjo is one of the furniture companies in Indonesia, specializing in rattan and wood products, offering them to the global market. Quality is also a key factor for the company, as good quality is considered an achievement. In the production process, there are inevitably product errors that do not meet specifications or defects, one of which occurs during the finishing process, where there are 8 types of defects. In the data of the quality control department for finishing in the year 2022, there were 246 instances of defects out of a total production of 10,921. This can hinder further production processes, and the company will incur losses due to costs and expenses for repairing defective products. The research is conducted with the aim of determining the level of product quality control, the causes of product defects, and preventive actions or improvement proposals to reduce the defect rate. The method used in this research is Statistical Process Control (SPC), which aims to minimize the defect rate. From the calculations and analysis of the Statistical Process Control (SPC) results for the eight types of defects, the dominant defect type is color variation, which accounts for 67 instances with a percentage of 27.2%. Furthermore, on the control chart calculations, findings were made for the data samples in January, June, August, and September. The cause-and-effect diagram revealed factors such as human, machine, raw materials, methods, and the environment that can contribute to defects. However, the largest cause is human error, as almost 90% of the finishing work is done by humans, often without following the Standard Operating Procedures (SOP) set by the company.
Analisis Kelayakan Investasi Alat Bioreaktor Anaerob Sebagai Reaktor Proses Fermentasi Nutrisi Organik Vandi Virnanda; Nawang Sonia; Hery Murnawan; Setijanen Djoko Harijanto
Industrika : Jurnal Ilmiah Teknik Industri Vol. 7 No. 3 (2023): Industrika: Jurnal Ilmiah Teknik Industri
Publisher : Fakultas Teknik Universitas Tulang Bawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37090/indstrk.v7i3.989

Abstract

Farmers in Papungan Village, Blitar Regency, are experiencing problems, namely the lack of subsidized fertilizer from the government to meet the demand for fertilizer for their agricultural land. To meet this shortage, farmers apply organic nutrient fertilizers as a substitute for non-subsidized and chemical fertilizers, but the process of making organic nutrient fertilizers requires a long fermentation process, which is 16-30 days. Therefore it is necessary to have an Anaerobic Bioreactor to help speed up the fermentation. This tool is quite expensive for farmers in Papungan village, so it is necessary to analyze the level of investment feasibility of the Anaerobic Bioreactor tool to find out whether it is worth buying or investing. From the calculation results obtained NPV (Net Present Value) of IDR 9,266,620, IRR (Internal Rate Of Return) of 40.1513% and BCR (Benefit Cost Ratio) of 1.0289 so it can be concluded that the purchase of Anaerobic Bioreactors is feasible. Keywords: Bioreaktor Anaerob, Investment, Organic Nutrient Fertilize.
Co-Authors Akhmad Fatikul Azzam Hery Murnawan Nawang Sonia Rizki Dwi Rama Setyawan Vandi Virnanda