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All Journal JPM17: Jurnal Pengabdian Masyarakat Heuristic JOURNAL OF INDUSTRIAL AND MANUFACTURE ENGINEERING Teknika: Engineering and Sains Journal Kaizen : Management Systems and Industrial Engineering Journal Jurnal Optimalisasi Jurnal Teknik Industri Terintegrasi (JUTIN) Jurnal Surya Teknika JURMATIS : Jurnal Manajemen Teknologi dan Teknik Industri JISO : Journal of Industrial and Systems Optimization Among : Jurnal Pengabdian Masyarakat Industrika : Jurnal Ilmiah Teknik Industri Prosiding Seminar Nasional Pengabdian Kepada Masyarakat Innovative: Journal Of Social Science Research Jurnal Taguchi : Jurnal Ilmiah Teknik dan Manajemen Industri Jurnal Pengabdian Masyarakat dan aplikasi Teknologi Journal Serambi Engineering (JSE)
Siti Mundari
Universitas 17 Agustus 1945 Surabaya
Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mathematics Mechanical Engineering Nursing Public Health Social Sciences Transportation Other

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Perencanaan Persediaan Bahan Baku dan Evaluasi Supplier Studi Kasus di PT. Romi Violeta Syafi Ul Nur Wahid; Siti Mundari
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.58601

Abstract

PT. Romi Violeta is an export furniture manufacturing company in Buduran, Sidoarjo, which faces the problem of inconsistency in mindi wood inventory due to fluctuations in demand for superior products. This condition causes stockouts, disrupts the production process, and hinders shipments. Another problem shows the unstable performance of 12 active suppliers. This study aims to determine optimal inventory planning and select the best suppliers using the Silver Meal Heuristic, Safety Stock, Reorder Point (ROP), and Analytical Hierarchy Process (AHP) methods. The results of the study showed that the Silver Meal method produced 9 optimal order cycles with a total inventory cost of IDR 3,908,169, more economical than IDR 234,303 compared to actual conditions and was able to eliminate 5 stockout incidents. The value of Safety Stock is 784 pcs and ROP is 1,697 pcs. Based on AHP, the reject rate is the main criterion, and CV. AP was selected as the best supplier with a global priority value of 0.1220.
Analisis Perencanaan Kebutuhan Bahan Baku untuk Meminimakan Kekurangan Persediaan dan Memenuhi Kebutuhan Konsumen Alvian Nikoverdiansah; Siti Mundari
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.58787

Abstract

UD. Raga Jati is a business engaged in handicraft production using teak wood as the main raw material. The company produces various types of handicrafts such as tissue boxes, mini mineral water racks, trays, wooden cups, and other products. The problem faced by the company is the frequent shortage of raw materials, which causes financial losses and has the potential to result in customer loss. Based on the results of the Silver-Meal method, the company can place raw material orders twice a year. The first order is made in July to cover the January–June period with an order quantity of 5,211 pcs and an ordering cost of Rp.1,675,859. The second order is placed in December to cover the August–November period with an order quantity of 5,307 pcs and an ordering cost of Rp.1,292,607. The safety stock calculation results indicate that the company should maintain a safety stock of 58 pcs. Based on the reorder point calculation, the company should reorder raw materials when the inventory remaining in the warehouse reaches 664 pcs. Furthermore, the company experienced total losses amounting to Rp.95,494,000 during 7 periods within one year.
Penerapan Continuous Review System dan Simulasi Monte Carlo untuk Meminimumkan Stockout Bahan Baku di CV. XYZ Jefry Pradana Kusuma Azhary; Siti Mundari
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.58903

Abstract

CV. XYZ is a manufacturing company producing electrical distribution pole accessory components operating a make-to-stock production system. A reactive, non-data-driven inventory control system caused four stockout incidents for UNP10 iron bars and strip plates during February 2025–January 2026, forcing costly emergency orders. This study aims to determine optimal safety stock, reorder point, and order quantity using the Continuous Review System (CRS) Hadley-Within Model, validated through Monte Carlo Simulation across 12 demand scenarios. Forecasting was conducted using Weighted Moving Average for UNP10 iron bars and Moving Average for strip plates. Results show CRS implementation reduced total inventory costs from IDR 20,612,890 to IDR 12,658,456 per year, achieving 38.59% efficiency, with policies proven stable against demand fluctuations.
Analisis Perencanaan Pengendalian Persediaan untuk Meminimalkan Overstock Paperbag (Studi Kasus: UD. Lestari Jaya Selalu) Amalia Rizka Febriyanti; Siti Mundari
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.58954

Abstract

UD. Lestari Jaya Selalu is a company engaged in paper bag production and experiences overstock problems due to the amount of finished goods inventory exceeding warehouse capacity. This condition causes increased storage costs and the risk of company losses. This study aims to determine the optimal method for planning and controlling raw material requirements and analyzing losses due to overstock. The method used is Material Requirement Planning (MRP) with the lot sizing technique Lot-for-Lot (LFL), Economic Order Quantity (EOQ), and Period Order Quantity (POQ). Demand forecasting is carried out using the Linear Trend Line Model and Exponential Smoothing with Trend methods. The results show that the Linear Trend Line Model has the lowest forecasting error rate. In addition, the LFL method produces the lowest total inventory cost of Rp20,748,000 for paper bag products measuring 25x30 and 20x25. The LFL method is considered effective in adjusting raw material requirements and reducing the risk of overstock, thereby increasing the company's operational efficiency.
Analisis Pengendalian Persediaan Bahan Baku pada Produksi Sandal di UD. Al Athyyah Prananda Aditia Ramadan; Siti Mundari
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.59045

Abstract

UD. Al Athyyah is a sandal manufacturing company experiencing problems in raw material inventory control. Inaccurate raw material planning causes shortages and excess inventory, resulting in increased storage costs, disrupted production activities, and potential lost sales. This study aims to analyze raw material requirements using the Material Requirement Planning (MRP) method with lot sizing techniques, namely Lot For Lot (LFL), Economic Order Quantity (EOQ), and Period Order Quantity (POQ). The data used include product demand, product structure, raw material inventory, and lead time. The results show that the POQ method produces the lowest total inventory cost and helps the company improve inventory control efficiency while reducing the risk of raw material shortages.
Perhitungan Kebutuhan Bahan Baku Tas untuk Meningkatkan Efisiensi Produksi dan Mengurangi Biaya Kerugian: Muhammad Hafidz Syarifudin; Siti Mundari
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.59083

Abstract

The bag convection industry in Indonesia is experiencing rapid growth along with increasing market demand. CV. Aurellia Jaya as one of the bag manufacturers faces a major problem in the form of a lack of raw material inventory which results in production delays and increased financial costs that must be borne. This study aims to calculate raw material requirements and the cost of losses due to late delivery to customers. The method used is the Silver–Meal Heuristic to determine the optimal timing and quantity of raw material orders, as well as cost analysis to measure losses in labor, machinery, and estimated delivery. The results show that the ordering cost is Rp1,704,000, the holding cost is Rp998,884, and the total inventory cost is Rp2,702,884, with a lot size of 6,488 rolls in 4 ordering cycles. The safety stock that must be provided is 176 rolls and the reorder point is at 786 rolls, and the total loss due to delays is Rp46,812,500 per 12 periods. The application of the Silver–Meal Heuristic method and Cost Analysis has been proven to make raw material inventory more efficient without raw material shortages and large losses for the company.
Perancangan Troli untuk Meningkatkan Efisiensi Pemindahan Bahan Baku dengan Pendekatan Ergonomis pada UMKM Kerupuk Mawar Naufal Irsyaad Arafah; Siti Mundari
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 2 (2026): April
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i2.59220

Abstract

Material handling activities at UMKM Kerupuk Mawar are still carried out semi-manually, resulting in poor ergonomic working postures and potentially causing Musculoskeletal Disorders (MSDs). This study aims to design an ergonomic trolley to improve the efficiency of raw material movement and reduce workers' physical workload. The methods used were Rapid Entire Body Assessment (REBA) to evaluate work posture risks and an anthropometric approach to determine the trolley dimensions. The results showed that the ergonomic trolley design has a handle height of 107 cm and a handle diameter of 5 cm based on workers' anthropometric data. The implementation of the ergonomic trolley reduced the REBA score for loading activities from 4 to 3 and raw material lifting activities from 8 to 2. Furthermore, the material handling time decreased from 81.80 seconds to 60.75 seconds, the carrying capacity increased from 2 to 4 sacks, and the handling frequency decreased from 15 to 8 cycles
Perencanaan Kebutuhan Bahan Baku untuk Memenuhi Permintaan pada Produksi Wheeldop Karisma Dwi Rahayu; Siti Mundari
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 3 (2026): July
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i3.59261

Abstract

UD XYZ is a company engaged in the metal industry, with its main product being wheeldops (wheel covers). The main problem faced by the company is the lack of raw material inventory planning for steel plates, resulting in stockouts that disrupt the production process and delay order fulfillment. This study aims to determine the optimal order quantity, appropriate reorder timing, and the required level of safety stock to minimize the risk of stockouts and inventory costs. The methods used in this study are the Continuous Review System (CRS) and the Periodic Review System (PRS). Based on the comparison results, CRS has a lower total inventory cost of Rp 1,712,173,383 compared to PRS. The model was then developed into a Continuous Review System with Backorder by considering a backorder cost of Rp 295,000 per sheet, resulting in an order quantity of 424 sheets, a safety stock of 83 sheets, and a reorder point of 120 sheets. This policy is intended to anticipate the risk of stockouts caused by raw material delivery delays during the lead time. 
Analisis Produktivitas Menggunakan Metode Objective Matrix (OMAX) dengan Pendekatan Root Cause Analysis (RCA) Qipty Raihan Azizah; Siti Mundari
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 3 (2026): July
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i3.59263

Abstract

PT. XYZ is a firm that works in the steel and building construction industry. Throughout its manufacturing operations, the company has encountered ongoing difficulties in meeting production targets consistently, resulting in reduced productivity performance. This study aims to evaluate productivity levels through the Objective Matrix (OMAX) method, with the Analytical Hierarchy Process (AHP) applied to determine and prioritize the relevant productivity indicators. In addition, Root Cause Analysis (RCA) is employed to investigate the underlying factors contributing to the company's productivity issues. The results of the study show that productivity indicators fluctuated during the measurement period. October recorded the highest productivity level at a productivity index of 105%, while November recorded the lowest productivity level at -3%. The AHP weighting results showed that Ratio 1 and Ratio 5 had the highest weights, achieving the lowest performance compared to the other ratios. Based on the RCA analysis and the fishbone diagram, the causes of low productivity stemmed from human, machine, material, and working condition factors. The root causes were then analyzed using the 5 Whys method to determine proposed improvements aimed at increasing the company’s productivity
Analisis Perencanaan Persediaan Bahan Baku Pupuk dan Optimalisasi Kapasitas Gudang Bahan Baku Erlangga Azam Ariputra; Siti Mundari
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 9 No. 3 (2026): July
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v9i3.59359

Abstract

PT. Dwi Jaya Ekaprima faces fluctuating raw material inventory that alternately causes overstock and shortage conditions, along with suboptimal warehouse capacity and layout. This study aims to analyze optimal raw material inventory planning and to design an improved warehouse layout. Data used include historical demand and consumption records of five raw materials throughout 2025. Methods applied include Single Exponential Smoothing (SES) for demand forecasting, Wagner-Whitin Algorithm and Silver-Meal Algorithm for optimal order quantity determination, and calculation of Safety Stock, Reorder Point (ROP), and total inventory cost analysis. The results indicate that SES with α = 0.9 is the best forecasting method, the Wagner-Whitin Algorithm yields the minimum total inventory cost, the highest ROP value belongs to Batu Pedel at 147,992 kg, and the Shared Storage method is selected as the proposed warehouse layout, optimizing a total storage area of 1,293.50 m² across three production warehouses without additional construction.
Co-Authors Adiati Trihastuti Adiati Trihastuti, Adiati Ajeng Septiana Alfiono, Bima Alvian Nikoverdiansah Amalia Rizka Febriyanti Amortiana, Olivia Lucky Andika Pratama Andre Leonard Sawargo, Andre Leonard Arvy Argadya Fortunata Busyro, Fakhrus Shirooth Cahyo, Chandra Dwi Dhiya 'ul Hanifah Dhoan Prasetyo Widanarko Cahyono Erlangga Azam Ariputra Erm Yuliaty Erma Yuliaty Erma Yuliaty, Erma Fakhrur Rozi, Fakhrur Farkhan, M. Firdah Lestari, Erlina Firdaus Muswati, Awanda Firmansyah, Aditya Nur Hanifah, Dhiya 'ul Herlina Herlina Herlina Herlina Herlina Jefry Pradana Kusuma Azhary Karisma Dwi Rahayu Khoirunniam, Alan Kurniawan, David Elvando Daniel Kurniawan, Mashur Affandi Muhammad Hafidz Syarifudin Mukhammad Misbakh Saffana Nakhas, Muhammad Iqbal Naufal Irsyaad Arafah Nekea, Keane Kenze Nugroho, Septian Adi Octavian, Muhammad Wirawan Prananda Aditia Ramadan Prananta, Ilham Leo Prima, Jupiter Yulio Qipty Raihan Azizah Rama Permadi Ramadhan, Arif Rianta Rendragraha, Putra Riski Rifaldi, Moch Fiqi Roikan Sofianto Romadhon, Muhammad Guntur Santoso, Afiyah Febriana Saputra, Danang Adi Siti Muhimatul Khoiroh Sri Hadijono Sri Hadijono, Sri Syafi Ul Nur Wahid Waaidzin, Zubaidu Wijaya, Aditya Wulan Ayu Permatasari Zainal Arief Zainal Arief Zainal Arief