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Jurnal Optimasi Sistem Industri

JOSI
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Published by Universitas Andalas

ISSN : 20884842 EISSN : 24428795 DOI : -

Control & Systems Engineering Decision Sciences, Operations Research & Management Engineering Industrial & Manufacturing Engineering Mechanical Engineering

Jurnal Optimasi Sistem Industri (JOSI) is a peer-reviewed journal that is published periodically (April and October) by the Department of Industrial Engineering, Faculty of Engineering, Universitas Andalas, Padang.

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Articles 394 Documents

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Developing an Industry-Specific Lean 4.0 Readiness Assessment Tool: A Case for the Chemical Sector Arif Budi Sulistyo; Putu Dana Karningsih; Samira Alvandi
Jurnal Optimasi Sistem Industri Vol. 23 No. 2 (2024): Published in January 2025 (published late, please read our note)
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

In an era where digital transformation is increasingly imperative, many industries struggle to navigate the complexities of technological adoption and operational efficiency. Lean principles, which emphasize waste reduction and process optimization, provide a robust foundation for digital transformation, particularly in the chemical industry, where unique operational challenges exist. This research aims to develop an integrated Lean 4.0 readiness assessment tool to bridge the gap between leanness and Industry 4.0 readiness. The study begins with a literature review on existing lean and Industry 4.0 readiness measurement tools and integrates them to create a new framework, using the Indonesia Industry 4.0 Readiness Index (INDI 4.0) as a reference, tailored specifically to the chemical industry. Expert interviews are conducted to refine the assessment tool, ensuring alignment with real-world industry conditions and practical insights. A Delphi-based expert consensus method combined with a fuzzy approach for handling imprecision in indicator ratings is employed to validate the framework, resulting in five key dimensions and 86 indicators. By gathering expert input, the tool addresses the chemical industry’s specific challenges and simplifies readiness evaluation, helping companies assess their preparedness for digital transformation and identify areas for improvement. The resulting framework enables chemical companies to bridge readiness gaps and prioritize targeted enhancements. Furthermore, this tool has the potential to serve as a scalable model for other industries, fostering more efficient and strategic digital transformation aligned with Industry 4.0 objectives globally.

Sequential Routing-Loading Algorithm for Optimizing One-Door Container Closed-Loop Logistics Operations Paulina Kus Ariningsih; Titi Iswari; Kevin Djoenneady Poetra; Yoon Mac Kinley Aritonang
Jurnal Optimasi Sistem Industri Vol. 19 No. 2 (2020): Published in October 2020
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

One-door container type of vehicle is the main tool for urban logistics in Indonesia which may take the form of truck, car, or motorcycle container. The operations would be more effective when it is performed through pickup-delivery or forward-reverse at a time. However, there is difficulty to optimize the operation of routing and container loading processes in such a system. This article is proposing an improvement for algorithm for sequential routing- loading process which had been tested in the small datasets but not yet tested in the case of big data set and vehicle routing problem with time windows. The improvement algorithm is tested in big data set with the input of the vehicle routing problem with time windows (VRP-TW) using the solution optimization of the Simulated Annealing process with restart point procedure (SA-R) for the routing optimization and Genetic Algorithm (GA) to optimize the container loading algorithm. The large data sets are hypothetical generated data for 800-2500 single-sized products, 4 types of container capacity, and 100-400 consumer spots. As result, the performance of the proposed algorithm in terms of cost is influenced by the number of spots to be visited by the vehicle and the vehicle capacity. Limitations and further analysis are also described in this article.

Penentuan Sistem Kompensasi Berdasarkan Risk Assessment dan Performance Appraisal Karyawan (Studi Kasus: Petugas Operasional Pemadam Kebakaran Kota Padang) Difana Meilani; Nurmay Rahmah
Jurnal Optimasi Sistem Industri Vol. 15 No. 2 (2016): Published in November 2016
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Risk is a possibility of the occurrence that may affect the achievement of objectives. Risk can give positive or negative effect. One of the jobs that have a high risk is firefighter job. Furthermore, a firefighter who are disciplined, responsible, and good in team work, they must be given a reward for their motivation. Therefore, the compensation that they get is equal with the potential risk and working achievement. The compensation of the risk and achievement is included in the extra payment of dangerous work (hazard pay) and bonus based on working achievement of an employee (merit pay). Comparing to the old system, the compensation system will increase the firefighters' income from Rp 900.000 to Rp 1.297.280 every month. The addition will also increase the budget of Damkar from Rp 550.800.000 to Rp 793.935.156 every year.

A Hybrid Model for Green Supplier Selection and Order Allocation: DEMATEL, ANP, and Multi-criteria Goal Programming Approach Dana Marsetiya Utama; Anindya Apritha Putri; Ikhlasul Amallynda
Jurnal Optimasi Sistem Industri Vol. 20 No. 2 (2021): Published in October 2021
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Increased competition in the industrial world forces companies to increase their competitiveness through Green Supply Chain Management (GSCM). The key to the success of GSCM is the selection of suppliers and the allocation of the proper order by taking into account environmental aspects. This decision involves several criteria and must also pay attention to the relationship between criteria. This study proposes a hybrid procedure to solve Green Supplier Selection and Order Allocation (GSSOA). The integration of Decision Making Trial and Evaluation Laboratory (DEMATEL), Analytic Network Process (ANP), and Multi-Criteria Goal Programming (MCGP) are proposed to solve this problem. The DEMATEL is used to calculate the relationship between criteria. Furthermore, the ANP is proposed to determine the weight of the criteria and supplier ranking. Finally, the MCGP method is offered for allocating orders based on priority suppliers. A case study on the food industry in Malang, Indonesia, was conducted to apply this procedure. The results showed that the low defects rate criterion is the most important compared to other criteria. The best supplier was successfully selected, and the order allocation was completed. Order allocation priority is to suppliers D, C, A, and B. This study also presents a sensitivity analysis for order allocation.

Perancangan Fixture Proses Gurdi untuk Produksi Komponen Brake Pads Suci Rahmawati; Vivi Triyolanda; Neta Harimeni; Meutia Syarah
Jurnal Optimasi Sistem Industri Vol. 9 No. 2 (2010): Published in 1st October 2010
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Brake pads is used to stop the rapid of vehicle while braking process is done. In making process if brake pads is needed a tool to make a operator work easier and can produce the brake pads component more precision, especially in making a hole process. A tool which is designed in drilling process in production of brake pads component use locator 3-2-1 principt in a placement the locator, using clamping to grip the component, and construction of jig dan fixture that is designed must be suitable with needs of making a hole process this brake pads component. To produce this tool, the cost must be calculated, such as direct cost, indirect cost and fixed cost to cover the 1200 lot sizes of this brake pads component. Based on design of this tool, it can be concluded that a tool which design of the drilling process can give benefit because it can help the operator in their work and it can produce the brake pads component more precision, and the rejected product can be minimized presisi. In addition, the set up time can be decreased and the cost be reduced.

Inventory Policy for Retail Stores: A Multi-Item EOQ Model Considering Permissible Delay in Payment and Limited Warehouse Capacity Roland Y. H. Silitonga; Ester E. L. Br Sembiring
Jurnal Optimasi Sistem Industri Vol. 21 No. 1 (2022): Published in April 2022
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

The retail industry such as minimarkets has many products consisting of several types of products that have expiration dates. Their warehouses have limited capacity, making it difficult to make decision about optimum inventory. Most of the suppliers will give permissible delay in payment, that can be used to increase income potential through earned by considering the risk of fines imposed if payments are exceeded and help companies raise capital before generating sales. These three factors must be considered when developing the inventory model. The purpose of this study is to develop a multi-item inventory model by considering perishable or damaged products, permissible delay in payment in limited warehouse. Model development is carried out in 2 stages. The first stage was the development of a multi-item EOQ model by considering product defects and permissible delay in payment. The second stage model is by adding a capacity constraint factor to the model. The results obtained are getting the optimal order quantity by considering the number of product types, product damage factors, late payments in limited warehouses, the best ordering policy can be found, and it is known that the total inventory costs to changes in parameters are good and sensitive to changes in percentage, interest percentage, payment allowances, and warehouse capacity through sensitivity tests.

Perancangan Sistem Manajemen Mutu Terintegrasi di Baristand Industri Padang Yudo Purnomo; Nilda Tri Putri; Elita Amrina
Jurnal Optimasi Sistem Industri Vol. 16 No. 2 (2017): Published in October 2017
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Baristand Industri Padang is an agency under control Ministry of Industry of Indonesia which it has a duty to serve the industries involving research activities, standardization and certification. To realize the programs, Baristand Industri Padang implemented a quality management system including ISO 9001, ISO/IEC 17025, ISO/IEC 17065, and KNAPPP 02. Nevertheless, it has been running separately. Therefore, quality of products not only proven by testing the final product, but also needed other evidence as a certificate that ensuring the quality of products. This research aims to design the Quality Management System for Baristand Industri Padang which it was implemented using life cycle methodology. Finding of this study revealed there was integration of ISO 9001, ISO/IEC 17025, ISO/IEC 17065, and KNAPPP 02 in the context of the structure of the process, documents, and organization. In the context of the structure of processes, it obtained four groups of primary process involving management, research and standardization, support, and improvement. Moreover, In terms of documentation, there was three levels of the document such as the document of strategic policy, quality guideline and procedures. While aspects of the organizational structure, the integration of quality management system required to develop the organizational structure that consist of Top Management, Technical Manager, Quality/Management Representative, Researcher and Administrative/Technical Staff. In addition, this study provided an integrated quality management information system including management of quality documents and quality records. Finally, the integrated quality management system and quality management information system has been designed to meet the expectations of the organization.

Enhancing Sustainable Performance in Hotel Industry: Supplier Innovativeness and Supply Chain Integration Muthia Roza Linda; Vera Pujani; Syafrizal Syafrizal; Ma'ruf; Salut Muhidin
Jurnal Optimasi Sistem Industri Vol. 24 No. 1 (2025): Published in June 2025
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

The hotel industry relies on supply chain to deliver value added products and services, therefore selecting suppliers significantly affects the company's competitiveness in the market to improve sustainability performance. This research is important to determine how supplier innovativeness can improve sustainable performance. It provides a new contribution in assessing the influence of supplier innovativeness and supply chain integration on sustainable performance in the hotel industry, however their combined impact remains underexplored. The study examines the effect of supplier innovativeness on sustainable performance by focusing on the mediating role of supply chain integration in the hotel industry. The study employed a non-probability sampling method using a purposive sampling technique. The sample was selected based on the criterion that respondents held managerial or equivalent positions, as they were responsible for decision-making in hotel operations. A total of 111 respondents participated in the study and the hypotheses were analysed using SmartPLS software. Supplier innovativeness has a significant effect on supply chain integration and also contributes significantly to the improvement of sustainable performance. Indirectly, supplier innovativeness also significantly impacts sustainable performance through supply chain integration. Supply chain integration partially mediates the relationship between supplier innovativeness and sustainable performance. Emphasizing these factors can help hotels to achieve their sustainability goals, offering valuable insights for managers and policymakers. Hotel managers should actively engage in partnerships with innovative suppliers and invest in strengthening integration across their supply chains. This research contributes to the growing body of literature on sustainable supply chain management, particularly within the hospitality industry.

Mastery of Skills 4.0 Effect on The Readiness of College Students in Facing Revolution of Industry 4.0 Isna Juwita; Insannul Kamil; Jonrinaldi; Berry Yuliandra; Irsyadul Halim
Jurnal Optimasi Sistem Industri Vol. 19 No. 1 (2020): Published in April 2020
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Revolution of industry 4.0 initiated by the German government, starting from the development of individual innovation behavior especially in the fields of robotics, digital technology, and information, has caused distortions to the future skills requirements. Some of the skills needed a lot in the past are now starting to experience a shift towards less needed. Some are even unnecessary because they are replaced by automation and robots. The emergence of several new skills (skills 4.0) that are more dominant is needed to make every interested party to prepare themselves to face the challenges of the revolution of industry 4.0. Students are one of the interested parties who will face the challenges of the revolution of industry 4.0 after they graduates from the formal higher education. This study determines the readiness of students in facing the revolution of industry 4.0, influenced by the mastery of skills 4.0 and individual innovation behavior with their innovation behavior as a mediating variable. Respondents in this study are 233 undergraduate students of the Andalas University. Using a cluster sampling technique, the data is collected using Likert scale based- questionnaire after which calculations are then performed using the Smart-PLS Program software 3.2.8. The results show that skills 4.0 and individual innovation behavior have a positive effect on students' readiness in facing the challenges of the revolution of industry 4.0. It implies that the students need to improve their mastery of skills 4.0 in order to prepare themselves to face the challenges of the revolution of industry 4.0.

Perbaikan Pengelolaan Pergudangan Melalui Penerapan Sistem Informasi Pergudangan di CV. ABB Hery Hamdi Azwir; Oktavia Patriani
Jurnal Optimasi Sistem Industri Vol. 16 No. 1 (2017): Published in May 2017
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

CV ABB is a medium scale car rental company which manages around 150 vehicles consists of small car (sedan or MPV) until large bus. To supporting the maintenance of all vehicles, they build a warehouse for spareparts and tools. Unfortunately, the management of warehouse does not have a good governance because all records done manually. This situation creates very high risk for data manipulation because manual record method is done by warehouse officer, lost of spare part in warehouse, counterfeit receipt, and no system to control spare part in warehouse. An improvement need to be done by implementing a warehouse management information system to overcome this problem. By applying information system analysis and design concepts and implementing through the application of PHP7 and MySQL, the new system can control all spare part in warehouse including incoming and outgoing spare part, PIC who requests the spare part, checking stock of spare part in the warehouse and stock out used by finance to make purchase order, spare part report from supplier and spare part request report. This system is also able to help finance to create purchase order and get approval from the user in order to make the process is more transparent and accountable.

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Contact Name
Rika Ampuh Hadiguna

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hadiguna@ft.unand.ac.id

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Journal Mail Official
hadiguna@ft.unand.ac.id

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Location
Kota padang,

Sumatera barat

INDONESIA