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INVENTORY : Industrial Vocational E-Journal On Agroindustry
Published by Politeknik ATI Padang
ISSN : -     EISSN : 27231895     DOI : -
Core Subject : Engineering,
Control & Systems Engineering Engineering Industrial & Manufacturing Engineering
INVENTORY mainly focuses on applied research in Agro-industrial systems and its technology. Therefore, INVENTORY will only process and publish submitted research articles or review articles in the area of: 1. Production Planning and Inventory Control 2. Ergonomic and Work Study 3. Product Design and Development 4. Optimization of Production System 5. Information System 6. Manufacturing Facility Design 7. Maintenance System 8. Energy and agro-industrial machinery 9. Related Topic in Industry 4.0 10. Warehouse 11. Procurement 12. Transportation and Distribution 13. Logistic Decision Making 14. Management and measurement of supply chain performance 15. Other related topics with an object of agro-industry, its products (food and non-food) and services (under the decision from editorial board)
Arjuna Subject : Teknik (semua kategori) - Tenik Industri dan Manufaktur
Articles 119 Documents
 8   9   10   11   12 
Decision Support System Menggunakan Analytic Hierarchy Process dan Analytical Network Process Pada Pemilihan Supplier Bahan Baku Mouludi, Isra; Ramdhanti, Muthia; Jamsan , Firdaus
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol. 3 No. 1 (2022)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v3i1.80

Abstract

This study aims to determine the best supplier for the selection of raw materials for NPK fertilizer based on three suppliers as an alternative in making supplier selection decisions with 4 criteria (price, quality, service, and delivery) and sub-criteria that have been determined and then arranged into a hierarchical structure. The use of Super Decision software which contains analytical capabilities from AHP (Analytic Hierarchy Process) and Analytic Network Process (ANP) can analyze priority and selectability levels by prioritizing the weight of each criterion against other criteria. the most influential in the selection of suppliers of raw materials for NPK fertilizer with the first priority being the quality criteria, the second priority being the price criteria, the third priority being the delivery criteria and the fourth priority being the service, based on the criteria and sub-criteria in the supplier selection being the main priority, supplier PT. A with the highest weight value 0.56492.
Penerapan Pengendalian Persediaan Bahan Baku dengan Model Probabilistik dan Sistem Kuantitas Pemesanan Tetap Alfi, Rizki; Harif, Muhammad; Pharmayeni
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol. 3 No. 1 (2022)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v3i1.71

Abstract

Inventory of raw materials is very important for the smooth production of the company and meet consumer demand for the company in market demand. The demand for tire production fluctuates and causes the demand for products not to need to be met to order, due to the shortage of raw materials. To solve the shortage of raw materials, the company holds special orders in consideration of savings in ordering the cost of ordering messages. To overcome the shortage of raw materials, the company holds special orders or sudden orders which will increase the cost of the message. The purpose of this study is to determine the optimum ordering of raw materials to minimize total inventory costs by using a probability model of raw material inventory control with a fixed order quantity system (Q method). From the results of research using the probabilistic model of inventory control method Q method, obtained the optimal order quantity (q*), reorder point (rop), and safety stock (ss) with total inventory costs more efficient compared to the total inventory costs of the company's current policies. what is to be achieved in inventory control is to minimize the cost of ordering, and the cost of savings to the company.
Integrasi Pendekatan Antropometri dan Metode RULA dalam Perancangan Meja Ragum Ergonomis untuk Praktikum Kerja Bangku Wirakusuma, Kadex Widhy; Aifah, Nur; Padang, Ricard Lawang
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol. 6 No. 2 (2025)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v6i2.4

Abstract

The bench vise table used in benchwork practice activities has not been ergonomically designed, which can lead to awkward postures and increase the risk of musculoskeletal disorders among students. Ergonomics is a crucial factor in improving comfort, efficiency, and safety during manual work. This study was conducted to design an ergonomic bench vise table by integrating anthropometric data with the Rapid Upper Limb Assessment (RULA) method. The research applied a descriptive-quantitative approach with 83 students selected from a population of 104 using Slovin’s formula. Anthropometric measurements were taken to obtain body dimensions, a Nordic Body Map (NBM) questionnaire was distributed to identify musculoskeletal complaints, and posture assessments were conducted using the RULA method. Data were analyzed with normality, uniformity, and adequacy tests, and percentile values (P5–P95) were used as the basis for the table design. The results revealed that the existing bench vise table surface was on average 12.5 cm below the students’ elbow height, which produced a RULA score of 6, categorized as high risk and requiring immediate improvement. Anthropometric analysis indicated elbow height values of P5 = 76.02 cm, P50 = 86.20 cm, and P95 = 96.38 cm. These values were used to propose a new bench vise table design with adjustable height in the range of 76.02–96.38 cm. Evaluation of the proposed design demonstrated a reduction in the RULA score from 6 to 2, signifying a shift from high risk to low risk. The findings suggest that an ergonomically designed adjustable bench vise table can significantly improve working posture, minimize musculoskeletal risks, and enhance learning conditions in benchwork practice. Further studies are recommended to test the structural stability, load capacity, and user satisfaction of the proposed design.
Evaluasi Risiko Muskuloskeletal dengan Metode REBA dan Nordic Body Map pada Stasiun Packing Industri Oleokimia Nadiyah, Khairun; Isfus Senjawati, Maria; Rika Putri, Gustiarini; Satria, Andika
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol. 6 No. 2 (2025)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v6i2.6

Abstract

Improper working postures are one of the main causes of Musculoskeletal Disorders (MSDs), particularly in manual and repetitive tasks such as packaging operations. This study aims to analyze the ergonomic risks associated with workers’ postures at the packing station of an oleochemical company and to propose corrective measures to reduce potential MSDs. The assessment employed two ergonomic evaluation methods: Rapid Entire Body Assessment (REBA) to determine posture risk levels and the Nordic Body Map (NBM) questionnaire to identify body regions experiencing discomfort. The results revealed that Worker A obtained a REBA score of 8, indicating a high-risk level that requires immediate corrective action, while Worker B had a score of 3, categorized as low risk. The most frequent complaints were concentrated in the lower back, shoulders, and wrists, primarily caused by repetitive bending and lifting movements from the conveyor to the pallet. The findings suggest that the main contributing factors are improper workstation height, repetitive tasks, and prolonged standing durations. Therefore, ergonomic improvements such as adjusting the height of the conveyor and worktable, implementing scheduled microbreaks, and providing posture training are recommended. These interventions are expected to reduce the risk of MSDs, improve worker comfort, and enhance overall productivity at the packing station.
Optimasi Parameter Campuran Material Paving Block Ramah Lingkungan Untuk Memaksimalkan Kuat Tekan dengan Metode Taguchi Rohmat, Rohmat; Sugiono, Didik; Hidayat, Hidayat
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol. 6 No. 2 (2025)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v6i2.72

Abstract

The increasing amount of industrial and domestic waste poses a serious challenge to environmental sustainability. Utilizing waste materials as substitutes in construction offers a promising solution. This study aims to optimize the composition of eco-friendly paving blocks by incorporating seashell waste and coconut coir powder using the Taguchi method. Four factors including cement, sand, seashell powder, and coconut coir powder were analyzed at four variation levels based on an orthogonal array L16 (4⁴), producing 16 experimental combinations. Compressive strength was used as the main performance parameter. The Signal-to-Noise (S/N) ratio analysis showed that coconut coir powder had the greatest effect on compressive strength, followed by seashell powder, cement, and sand. The optimal composition was obtained with 643.23 g of cement, 2289.60 g of sand, 228.961 g of seashell powder, and no coconut coir powder. Although ANOVA results indicated no statistically significant factors (p > 0.05), coconut coir powder had the strongest influence. The regression model explained 56.25% of the variation in compressive strength. These findings suggest that seashell waste can serve as a viable partial replacement material for producing environmentally friendly and cost-effective paving blocks.
Optimasi Optical Distribution Cabinet (ODC) pada Jalur Optical Distribution Point (ODP) Menggunakan Metode Pemrograman Linear Spalanzani, Widya; Raihan, Dwi Rizky Puti; Zulkarnaen, Iskandar; Muhendra, Rifki
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol. 6 No. 2 (2025)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v6i2.73

Abstract

PT Telkom Access is a global internet service provider that plays a crucial role in developing fiber optic–based telecommunication infrastructure. One of its operational areas, located on Jl. Duri, Gambir District, Central Jakarta, faces issues related to the inefficient distribution route of the 1:4 Optical Distribution Point (ODP) serving twenty customer homes. This condition has led to 198 customer complaints in 2023 and high installation costs for the Optical Distribution Cabinet (ODC) to ODP distribution network, amounting to Rp 78,205,400. This study aims to optimize the installation cost of the Fiber to the Home (FTTH) network using a Linear Programming approach with the aid of LINGO software, as well as to design a more efficient ODC scheme on a new ODP configuration. The approach involves a comparative analysis between 1:4 and 1:8 ODP configurations, considering both technical and economic aspects of fiber optic network distribution. The results show that using an ODP 1:8 configuration with a 1:8 passive splitter in the new FTTH line produces a total installation cost of Rp 49,085,400, which is approximately Rp 29,120,000 lower than the 1:4 ODP configuration, resulting in cost optimization of 59.37%. In addition to cost savings, the ODP 1:8 configuration reduces network maintenance complexity and enhances distribution efficiency without compromising service quality. Based on these findings, this research recommends the adoption of the ODP 1:8 configuration as the optimal solution to improve cost efficiency, network maintainability, and sustainable infrastructure development in fiber optic network implementation. This strategy is expected to strengthen PT Telkom Access’s competitiveness and support sustainable global internet service performance.
Perencanaan Perjalanan Wisata Berbasis Pemilihan Akomodasi dan Waktu Sitanggang, Bryan Estavan Imanuel; Utami, Ni Made Cyntia; Oktaviani, Ni Luh Gede Dita; Surya, Ni Kadek Puji Paramitha Surya
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol. 6 No. 2 (2025)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v6i2.74

Abstract

Tourism journeys always begin with a planning stage, involving the selection of destinations to visit and the accommodation to be used throughout the trip. The Orienteering Problem with Hotel Selection (OPHS) serves as a model for recommending multi-day travel itineraries that are both efficient and profitable, as it aims to maximize total reward (or profit) while keeping the total travel distance within reasonable limits. This research extends the conventional OPHS by incorporating the time-dependent satisfaction of destinations, resulting in a model referred to as the Orienteering Problem with Hotel Selection and Time-Dependent Satisfaction (OPHS-TDS). The motivation for this development arises from the observation that the quality of tourist experience at certain destinations varies depending on the time of arrival. This phenomenon is particularly evident in nature-based attractions, where visiting during specific period can significantly affect both the visitor’s experience and the perceived benefit gained from the trip. The study presents a mathematical formulation of the OPHS-TDS and proposes a solution approach based on the Skewed Variable Neighborhood Search (SVNS) algorithm by allowing exploration of wide range neighborhood of solutions to search for near optimum solution. Computational experiments on benchmark datasets demonstrate that SVNS is efficiently solve OPHS-TDS with only 3.17% average differential with ILP, and further experiments using real-world data from the Province of Bali confirm the model’s applicability and potential in practical multi-day tourism planning scenarios.
Analisis Standarisasi Material dan Optimasi Proses Produksi pada Pembuatan Keripik Pisang Muti, Asri Amalia; Syarofah, Feti
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol. 6 No. 1 (2025)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v6i1.99

Abstract

This study aims to analyze the need for material standardization and to formulate process optimization strategies in the production of banana chips at UD. FAVORIET. Quality instability was identified during the period of August–September 2021, indicated by a total defect weight of 28.875 kg from a total production volume of 323 kg. The defects consisted of burnt chips (11.375 kg) and non-crispy or soft chips (17.5 kg). The analysis was conducted by evaluating the standards of raw materials (banana type, ripeness level, slicing thickness), process parameters (oil temperature, frying time, stirring method), and operator-related factors. The results show that high defect levels were caused by inconsistent material quality, variations in slice thickness, unstable frying temperature, and insufficient operator control. Optimization recommendations include standardizing slice thickness at ±2 mm, selecting bananas with 70–80% ripeness, maintaining frying temperature at 150–160°C, setting frying duration between 10–12 minutes, and providing regular operator training. The implementation of these standards is expected to improve production stability and significantly reduce defect rates.
Analisis Pengaruh Intensitas Pencahayaan Di Laboratorium Pengujian Terhadap Akurasi Pengujian Tri Ernita; Rachman, Boby; Yulius, Henny; Sastri
INVENTORY: Industrial Vocational E-Journal On Agroindustry Vol. 6 No. 2 (2025)
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/inventory.v6i2.75

Abstract

The testing laboratory is a high-precision testing room that reguires adeguate environmental conditions for testing needs.As a testing laboratory, it is important for the banten Indonesia Laboratory to control the laboratory's environmental conditions, one of which is lighting intensity.Inadeguate lighting intensity can reduce testing accuracy, Currently, the average lighting intensity in the banten Indonesia Laboratory  is  370 lux, this value is below the regulatory standard Threshold value, which according to PERMENKES NO. 70 of  2016 for standard laboratories lighting intensity is 500 lux. This study aims to increase lighting according to SNI 7062:2019 and  testing accuracy in the Banten  Indonesia Laboratory and to determine how strong the relationship  betwen lighting intensity and testing accuracy is using correlation analysis with SPSS V.27. The results of this study indicate that lighting intensity has increased to 489 lux and the average accuracy has increased by 7.5 % after changing the lamp,in addition,the relationship between lighting intensity and testing accuracy strong ,this is evidenced by the result of the correlation analysis obtained a significance value of 0.620 and 0.627 .

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