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A Decision Support System to Achieve Self-Sufficiency of Soybean (Case: Central Java Province, Indonesia) Muhammad Hisjam; Nancy Octyajati; Wahyudi Sutopo; Ahad Ali
Jurnal Optimasi Sistem Industri Vol. 19 No. 2 (2020): Published in November 2020
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Soybean self-sufficiency in Central Java Province is a problem that is difficult to realize at this time. As an important commodity, self-sufficiency becomes a serious concern for the government. Supply chain management of soybean is related to the integration of supply, demand, and distribution of soybean. The characteristics of entities involved in the soybean supply chain are complex, dynamic, and probabilistic that make the problem cannot be solved using an analytical model and it becomes too risky for trial and error. A suitable tool is using a simulation model. This paper deals with developing a Decision Support System (DSS) using a simulation model that will assist the government in adopting policies in order to achieve self-sufficiency of soybean and the improvement of farmer's welfare. DSS will help decision-makers to try various scenarios of policy in an easy way. The method was started with developing model components, then decision components, and next creating user interfaces. The simulation and system modeling is created by using Powersim software with the intent to obtain the simulation and single document interface (SDI) of the supply chain model. The result shows that land expansion policy is a top priority for realizing food self-sufficiency while increasing productivity and reducing costs of agricultural activities are the main priorities for improving the welfare of farmers.

Overall Equipment Effectiveness Analysis Using Discrete Event Simulation at Table Tennis Table Manufacturer Yuniaristanto Yuniaristanto; Iqbal Wahyu Saputra; Muhammad Hisjam
Jurnal Optimasi Sistem Industri Vol. 19 No. 2 (2020): Published in November 2020
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

To measure the performance of the production process, an efficiency calculation is performed using the Overall Equipment Effectiveness (OEE) method. OEE can measure various production losses and identify potential developments that can be carried out in a production process. This research is expected to be an input to improve production efficiency. The results of overall equipment effectiveness are then performed using Discrete Event Simulation, which built using STELLA Architect. The result shows that their overall equipment effectiveness scores are below the company goals, and performance rate is their lowest score. These simulation results are expected to be a basis for improvements in the production division, especially at Table Tennis Table Manufacturer.

Proposing Electric Motorcycle Adoption-Diffusion Model in Indonesia: A System Dynamics Approach Dwi Setyo Sulistyono; Yuniaristanto Yuniaristanto; Wahyudi Sutopo; Muhammad Hisjam
Jurnal Optimasi Sistem Industri Vol. 20 No. 2 (2021): Published in November 2021
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

In 2019, the number of conventional vehicles in Indonesia reached 133,617,012 units, dominated by motorcycles of 112,771,136 units and passenger cars of 15,592,419 units. The high number of conventional motorcycle users can increase the number of pollutants and combustion emissions in the environment. This condition has encouraged the transition to a sustainable transport system that will be needed for decades to come, especially for the electric motorcycle to resolve the issue. This research aims to predict and estimate the market share of electric motorcycles by considering life cycle cost per kilometer. System dynamics simulations are developed to model the adoption-diffusion of electric motorcycles in Indonesia. This model has four main modules: an electric motorcycle module, a conventional motorcycle module, an economy module, and a consumer market module. This model shows a positive trend of EM market share from 2021-2030, with the market share value of EM is 0,411 in 2030. The development of retail price subsidy and electricity price scenarios is also carried out to determine the right policies to accelerate the adoption-diffusion process. Based on the scenario, the provision of retail price subsidy and a decrease in electricity price can increase the value of the EM Market Share.

Perbaikan Min-Max Distribusi Dengan Multiple Criteria ABC Analysis NG-Model Untuk Pengoptimalan List Part Number Zulhendra Hanif; Muhammad Hisjam; Wakhid Ahmad Jauhari
Jurnal Ilmiah Teknik Industri Vol. 18, No. 1, Juni 2019
Publisher : Department of Industrial Engineering Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v18i1.7727

PT GMF Aeroasia Tbk. is the largest MRO company in Indonesia. This company has 67 plants worldwide. With the many plants that must be serviced, the complex process of repairing aircraft with spare parts that exceeds 15,000 types. Part distribution is a very big challenge and must be faced by companies where part distribution is done with multi-stage warehouses. At present the main warehouse has problems with the inefficiency of the min-max distribution system at each plant where the system aims to bond the parts that have the greatest frequency of demand to the sub-warehouse at the plant. This study discusses the improvement of Min-Max distribution with ABC Analysis NG-Model Multiple Criteria which aims to improve the efficiency of the list part number with the frequency of order transfer requests and the most optimal performance at 9 internal plants with the largest part demand activity. The proposed method is known to be able to increase min-max accommodation including, Transfer Order frequency from 23% to 40.80% and weekly delivery performance from 22% to 62.69%. In addition, this method can also reduce the amount of part number on Min-max with the results of Transfer Order accommodation and increased performance from the methods currently used.

Design of The Proposed Improvement to OVO’s Electronic Money Payment Services in Grab Online Transportation Services Dinnur Swaraswati; Eko Pujiyanto; Muhammad Hisjam
Jurnal Ilmiah Teknik Industri Vol. 19, No. 1, June 2020
Publisher : Department of Industrial Engineering Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v19i1.9035

The advancement of science and technology in the world has brought many influences to the changes in people's behavior and habits, one of that is the technology payment system adopted as an electronic payment system. As an electronic payment instrument, OVO cooperates with one of the online-based transportation services, Grab. However, the success of a company can be seen from the quality of service in meeting the satisfaction of the community or customers. The success of the company in providing quality services can be determined by the Service Quality (Servqual) approach, that is a method used to measure service quality from the attributes of each dimension, so that a gap value will be obtained that is the difference between consumers' perceptions of services that has been received in the hope that will be received. The objective to be achieved is to propose a design in the form of alternative solutions for the priority of improving the quality of electronic money OVO services in Grab applications. Data were collected through a questionnaire using non-probability sampling techniques with a total sample of 140 respondents. The study found the main problems, namely in the dimensions of compensation, responsiveness, and Privacy/Security.

PERKEMBANGAN RISET BIDANG MANAJEMEN RANTAI PASOK BERKELANJUTAN Muhammad Hisjam
Performa: Media Ilmiah Teknik Industri Vol 17, No 2 (2018): PERFORMA Vol. 17, No 2 September 2018
Publisher : Industrial Engineering Study Program, Faculty of Engineering, Universitas Sebelas Maret

Keberlanjutan (sustainability) merupakan isu penting dengan belakangan ini. Manajemen Rantai Pasok Berkelanjutan (Sustainable Supply Chain Management, SSCM) yang merupakan pengembangan dari kajian manajemen rantai pasok dengan menggabungkannya dengan konsep keberlanjutan juga menjadi salah satu tren riset dalam bidang rantai pasok. Pentingnya kajian SSCM ditunjukkan dengan peningkatan jumlah publikasi dalam bidang ini. Makalah ini mengkaji riset SSCM secara kuantitatif untuk mengetahui tren risetnya. Metode kuantitatif dengan statistik diskriptif digunakan untuk mengolah data seluruh luaran publikasi SSCM yang diindeks oleh SCOPUS sampai dengan periode Maret 2017. Pengolahan data juga dilakukan dengan membandingkan perkembangan ilmu SSCM di dunia, dan Indonesia. Analisis perbandingan perkembangan riset SCM berdasarkan wilayah, subjek, kata kunci juga dibahas pada makalah ini. Secara khusus, tren riset SSCM di Indonesia juga dianalisis berdasarkan subject area terkait yang digunakan untuk memecahkan masalah SSCM. Tren keilmuan SSCM juga disarikan dari beberapa literature review yang terpilih.

Earned Value Method untuk Analisis Pengendalian Jadwal dan Biaya pada sebuah Proyek Konstruksi Pump House Salwa Nisrina; Muhammad Hisjam
JTI: Jurnal Teknik Industri Vol 8, No 1 (2022): JUNI 2022
Publisher : Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/jti.v8i1.12428

Penelitian ini bertujuan untuk melakukan analisis pengendalian jadwal dan biaya pada konstruksi pump house C2BM5a. Penelitian dilakukan di PT Prasadha Pamunah Limbah Industri, sebuah industri penyedia jasa pengolahan limbah yang berlokasi di Desa Nambo, Kabupaten Bogor. Metode yang digunakan dalam penelitian adalah metode nilai hasil atau earned value method yang dapat mengintegrasikan komponen jadwal dan biaya menjadi satu kesatuan evaluasi proyek. Proses analisis dilakukan dengan membandingkan biaya aktual, biaya rencana, jadwal aktual, dan jadwal rencana. Sehingga didapatkan hasil berupa variansi biaya dan jadwal, serta indeks performansi dari jadwal dan biaya. Selain itu dilakukan juga proyeksi penyelesaian proyek untuk mengetahui berapa waktu dan biaya yang dibutuhkan untuk menyelesaikan proyek berdasarkan kondisi pada periode pelaporan. Setelah dilakukan perhitungan, dapat diketahui bahwa proyek mengalami keterlambatan selama 49 hari atau 7 minggu dengan biaya penyelesaian proyek sebesar Rp295,191,763.23. Keterlambatan yang terjadi disebabkan karena adanya ketidaksesuaian kinerja pada vendor. Sehingga biaya penyelesaian proyek akibat keterlambatan sepenuhnya dibayarkan oleh vendor. This study aims to analyze the schedule and cost control in a C2BM5a pump house construction. The research was conducted in an industrial waste treatment service provider located in Bogor. The research uses the earned value method which can integrate schedule and cost components into a single project evaluation unit. The analysis process is carried out by comparing the actual costs, planned costs, actual schedules, and planned schedules. Thus, the results obtained in the form of cost and schedule variance, as well as a performance index of schedule and cost. In addition, project completion projections are also carried out to find out how much time and cost it will take to complete the project based on the conditions in the reporting period. After calculating, it can be seen that the project has been delayed for 49 days or 7 weeks with a project completion cost of Rp. 295,191,763. The delay that occurs is due to a performance discrepancy at the vendor. Thus, the cost of completing the project due to delays is fully paid by the vendor.

Evaluation of Driving Comparative Life Cycle Cost Assessment of Conventional and Electric Motorcycles in Indonesia: Monte Carlo Analysis Lsa Aldira Hafidza; Yuniaristanto; Wahyudi Sutopo; Muhammad Hisjam
Jurnal Optimasi Sistem Industri Vol. 21 No. 2 (2022): Published in November 2022
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v21.n2.p55-65.2022

The adoption of electric vehicles (EVs) is one of the solutions to reduce emission problems. Vehicle cost analysis is one of the keys to seizing the Indonesian market. As a consumer, it is not only the purchase price that needs to be considered, but the life cycle costs throughout ownership also need to be considered in the purchase. This study discusses the life cycle cost (LCC) of EVs in Indonesia, especially electric motorcycles (EMs), which will be compared with conventional motorcycles (CMs). In particular, this study aims to encourage the government's target for ownership of 2.1 million EMs in Indonesia by 2025. The novelty of this research is to develop a more comprehensive LCC model by considering the costs in terms of tangible and intangible to compare the two types of motorcycles using Monte Carlo simulation. This simulation is used to coordinate the behavioral uncertainty of motorcycle users. As a result, the value of an EM is more economical than CM for various users. The average value percentage of EMs is lower than CMs by 45% (IDR 30,6 million). In addition, several scenarios are also analyzed to maximize consumer welfare in Indonesia.

Evaluation of Driving Comparative Life Cycle Cost Assessment of Conventional and Electric Motorcycles in Indonesia: Monte Carlo Analysis Yuniaristanto; Lsa Aldira Hafidza; Wahyudi Sutopo; Muhammad Hisjam
Jurnal Optimasi Sistem Industri Vol. 21 No. 2 (2022): Published in October 2022
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/josi.v21.n2.p55-65.2022

The adoption of electric vehicles (EVs) is one of the solutions to reduce emission problems. Vehicle cost analysis is one of the keys to seizing the Indonesian market. As a consumer, it is not only the purchase price that needs to be considered, but the life cycle costs throughout ownership also need to be considered in the purchase. This study discusses the life cycle cost (LCC) of EVs in Indonesia, especially electric motorcycles (EMs), which will be compared with conventional motorcycles (CMs). In particular, this study aims to encourage the government's target for ownership of 2.1 million EMs in Indonesia by 2025. The novelty of this research is to develop a more comprehensive LCC model by considering the costs in terms of tangible and intangible to compare the two types of motorcycles using Monte Carlo simulation. This simulation is used to coordinate the behavioral uncertainty of motorcycle users. As a result, the value of an EM is more economical than CM for various users. The average value percentage of EMs is lower than CMs by 45% (IDR 30,6 million). In addition, several scenarios are also analyzed to maximize consumer welfare in Indonesia.

Proposing Electric Motorcycle Adoption-Diffusion Model in Indonesia: A System Dynamics Approach Dwi Setyo Sulistyono; Yuniaristanto; Wahyudi Sutopo; Muhammad Hisjam
Jurnal Optimasi Sistem Industri Vol. 20 No. 2 (2021): Published in October 2021
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

In 2019, the number of conventional vehicles in Indonesia reached 133,617,012 units, dominated by motorcycles of 112,771,136 units and passenger cars of 15,592,419 units. The high number of conventional motorcycle users can increase the number of pollutants and combustion emissions in the environment. This condition has encouraged the transition to a sustainable transport system that will be needed for decades to come, especially for the electric motorcycle to resolve the issue. This research aims to predict and estimate the market share of electric motorcycles by considering life cycle cost per kilometer. System dynamics simulations are developed to model the adoption-diffusion of electric motorcycles in Indonesia. This model has four main modules: an electric motorcycle module, a conventional motorcycle module, an economy module, and a consumer market module. This model shows a positive trend of EM market share from 2021-2030, with the market share value of EM is 0,411 in 2030. The development of retail price subsidy and electricity price scenarios is also carried out to determine the right policies to accelerate the adoption-diffusion process. Based on the scenario, the provision of retail price subsidy and a decrease in electricity price can increase the value of the EM Market Share.

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