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Alfanadim, Andraya
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Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Engineering Industrial & Manufacturing Engineering

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Analisis Pengendalian Kualitas Menggunakan Metode QC Seven Tools pada Produk X di PT DOM Bathin Malandri, Yoga; Safariyani, Eva; Divala Zahra, Shakila; Alfanadim, Andraya
Industrika : Jurnal Ilmiah Teknik Industri Vol. 9 No. 4 (2025): Industrika: Jurnal Ilmiah Teknik Industri
Publisher : Fakultas Teknik Universitas Tulang Bawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37090/fzrayb79

Abstract

The Production Department at PT DOM faces a high defect rate in the chain model x. This study aims to identify the types of defects, analyze their root causes, and provide improvement recommendations to reduce defects. The method used in this research is the Seven Tools approach, which includes Check Sheet, Histogram, Pareto Diagram, Fishbone Diagram, Scatter Diagram, and Control Chart. The results indicate 14 major types of defects, with outer plate endless reversed, assy no riveting, and pin black (adhesion) being the most dominant. The Fishbone Diagram analysis identifies the primary causes of defects as stemming from human factors, machinery, methods, materials, and the environment. The Control Chart shows that the production process remains within control limits, but improvements are needed to enhance efficiency. Recommended improvements include operator training, enhanced quality supervision, implementation of preventive maintenance, and strict analysis of raw material suppliers. Implementing these strategies is expected to reduce defect rates and improve the quality of the chain model x. Keywords: Control Chart, Defect, Fishbone Diagram, Quality Control, Seven Tools
Perbandingan Metode Branch and Bound dan Metode Cheapest Insertion Heuristics dalam Penyelesaian Travelling Salesman Problem Alfanadim, Andraya; Winarno, Winarno; Zahra, Shakila Divala; Nudin, Muhammad Ihsan
Industrika : Jurnal Ilmiah Teknik Industri Vol. 10 No. 1 (2026): Industrika: Jurnal Ilmiah Teknik Industri
Publisher : Fakultas Teknik Universitas Tulang Bawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37090/qgsgnm25

Abstract

This study aims to compare the efficiency of the Branch and Bound (B&B) and Cheapest Insertion Heuristics (CIH) methods in solving the Traveling Salesman Problem (TSP) for optimizing delivery routes at PT BT. The study was conducted to determine the shortest delivery route, which has implications for fuel cost savings. Primary data in the form of delivery routes to five customer locations were analyzed using manual calculations and validated using the WinQSB software. The results show that the B&B method produces a route with a total distance of 114.6 km and fuel cost savings of 13.444% compared to the original route, while the CIH method provides a distance of 114.8 km with savings of 13.293%. Although both methods show almost similar results, the B&B method is superior in minimizing distance and costs. This study provides recommendations for PT BT to implement the B&B method as an optimal solution in distribution management, in order to improve operational efficiency and customer satisfaction. Keywords: Branch and Bound; Cheapest Insertion Heuristics; Cost Savings; Route Optimization; Traveling Salesman Problem.
Analisis Pengendalian Kualitas Produksi Tabung Gas LPG 3KG dengan Pendekatan Six sigma pada PT ABC Nudin, Muhamad Ihsan; Sukanta, Sukanta; Alfanadim, Andraya
Industrika : Jurnal Ilmiah Teknik Industri Vol. 10 No. 1 (2026): Industrika: Jurnal Ilmiah Teknik Industri
Publisher : Fakultas Teknik Universitas Tulang Bawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37090/rc0cj331

Abstract

Quality control is essential to ensure that products meet predetermined specifications and align with company policies. Based on PT XYZ’s production report from December 2023, the number of defective products requiring repairs was notably high, reaching 17.3% of the total 98,852 gas cylinders produced within 19 days. This study aims to evaluate the quality control performance and identify the factors influencing it. The Six sigma DMAIC method was applied to assess performance. At the measurement stage, the Defects Per Million Opportunities (DPMO) was found to be 44,743, corresponding to a sigma value 3.203. The study identified four key factors contributing to production defects: machinery, materials, personnel, and methods. Although the company's quality control efficiency is deemed satisfactory, it has yet to prevent a significant sales decline of 20-40%. Therefore, implementing Six sigma analysis is expected to uncover processes that can reduce manufacturing defects in 3 kg LPG cylinder production. By addressing these issues, the company can improve product quality, maintain customer satisfaction, and enhance competitiveness in the market. Keywords: DMAIC, DPMO, Quality Control, Six sigma
Pengendalian Persediaan Dies Mesin FM Menggunakan FSN Analysis Berdasarkan Turn Over Ratio pada Departemen Produksi Zahra, Shakila Divala; Winarno, Winarno; Alfanadim, Andraya
Industrika : Jurnal Ilmiah Teknik Industri Vol. 10 No. 1 (2026): Industrika: Jurnal Ilmiah Teknik Industri
Publisher : Fakultas Teknik Universitas Tulang Bawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37090/33031m02

Abstract

Effective inventory management is essential for manufacturing companies to ensure smooth production processes. This study was conducted in the Production Department, which faces challenges in managing the inventory of FM Machine dies, including irregular stock turnover, an excess of rarely used items, and shortages of high-rotation items. This research aims to apply the Fast Moving, Slow Moving, Non-Moving (FSN) Analysis method based on the Turn Over Ratio (TOR) to classify inventory according to its movement levels. Historical inventory data of dies from January to December 2023 were analyzed to calculate average inventory, partial TOR, storage duration, and annual TOR. The results showed that out of 53 types of dies, 43% were categorized as Fast Moving, 32% as Slow Moving, and 25% as Non-Moving. These findings provide a framework for optimizing inventory management by prioritizing procurement based on actual needs. In conclusion, the FSN Analysis method based on TOR is effective in creating an efficient inventory management system, reducing storage costs, and ensuring the availability of items to support smooth operations. This study contributes by presenting a practical approach that can be applied across various manufacturing sectors to enhance production efficiency. Keywords: FSN Analysis, Inventory Management, Manufacturing, Production, Turn Over Ratio
Co-Authors Bathin Malandri, Yoga Divala Zahra, Shakila Nudin, Muhamad Ihsan Nudin, Muhammad Ihsan Safariyani, Eva Sukanta Sukanta Winarno Winarno Zahra, Shakila Divala