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Irawan, Heri Tri
Jurusan Teknik Industri, Fakultas Teknik, Universitas Teuku Umar
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Studi Kelayakan Investasi Perkebunan Kelapa Sawit PT. Agro Sinergi Nusantara (ASN) Kabupaten Aceh Selatan Heri Tri Irawan; Iing Pamungkas
Jurnal Optimalisasi Vol 6, No 1 (2020): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v6i1.1830

Abstract

The oil palm plantation business is one of the businesses that are considered prospective at present. Investment to develop oil palm plantations requires large funds with a long payback period. The financial strength of investors is needed given that in the early days of plantation operations, plantation productivity was still relatively low. PT. Agro Sinergi Nusantara (ASN) is one of the national private companies engaged in the oil palm plantation sector, and plans to develop oil palm plantations covering an area of 14.000 hectares. This study aims to determine the feasibility of the business based on the financial aspects of the investment plan of PT. Agro Sinergi Nusantara (ASN) in opening an oil palm plantation in South Aceh Regency. This study uses financial feasibility analysis methods, namely net present value (NPV), internal rate of return (IRR) and payback period (PP). The final result in this study is that this investment is feasible based on net present value > 0, internal rate of return = 21,4% and payback period = 3 years.
Pengendalian Kualitas Produk Paving Block untuk Meminimalkan Cacat Menggunakan Six Sigma pada UD. Meurah Mulia Abdiel Khaleil Akmal; Risnadi Irawan; Khairul Hadi; Heri Tri Irawan; Iing Pamungkas; Kasmawati Kasmawati
Jurnal Optimalisasi Vol 7, No 2 (2021): Oktober
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v7i2.4435

Abstract

A production process will not be free of difficulties with faulty goods during its implementation; this is a problem that is a major factor in the production process; if the process still has many problems with product defects, the process has not been adequately regulated. Moving on from the issues raised above, the author did research at UD. Meurah Mulia, a paving stone manufacturer. For the time being, the control process in the manufacturing process is inspection control, which is an inspection that just distinguishes good and faulty goods without improving the process. In this scenario, the authors advise using the Six Sigma approach to eliminate flaws, which is a process control method that can affect decisions connected to product manufacturing, namely the production and insfection functions. The results of the analysis through processing with the Six Sigma method, which goes through five stages, namely define, measure, analyze, improve, and control, show that the current control process is ineffective, as evidenced by the occurrence of numerous defects in the manufacturing of Paving Blocks.
ANALISIS LEAN SERVICE UNTUK MENGURANGI WASTE PADA PERUSAHAAN DAERAH AIR MINUM (PDAM) TIRTA MOUNTALA ACEH BESAR Heri Tri Irawan; Iing Pamungkas; Arhami Arhami
Jurnal Optimalisasi Vol 4, No 2 (2018): Oktober
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v4i2.1498

Abstract

Tirta Mountala Regional Water Company (PDAM) is a regional company that has a concentration in the field of water supply. This study aims to implement Lean Service at PDAM Tirta Mountala in an effort to reduce waste in the service of installing new pipe connections. The method used in the study uses Big Picture Mapping and Root cause analysis in finding the causes of waste. The study was conducted in several stages, namely preliminary observations then continued with determining the use of the methods used, collecting data, conducting data processing, analyzing the results of data processing and finally concluding the results of the research, as well as being reviewed from lean service theories, The Waste that occurs is Over Production, Defect, Unnecessary Inventory, Inappropriate Processing, Excessive Transportation, Waiting, Unnecessary Motion. While the critical waste that occurs in the service process is waiting with a weight of 0.36. Waste waiting is caused by mechanical power delay, material repair delay, delay in repairing pipelines passing through public spaces. By knowing the types of waste and critical waste in PDAMs, it is expected to reduce waste and customer satisfaction is fulfilled.
Strategi Pengurangan Risiko Kerusakan Pada Komponen Kritis Boiler di Industri Pembangkit Listrik Iing Pamungkas; Heri Tri Irawan
Jurnal Optimalisasi Vol 6, No 1 (2020): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v6i1.2197

Abstract

This paper uses the failure mode approach and effect analysis (FMEA) in formulating a risk reduction strategy for damage to critical components of the boiler section of the Nagan Raya steam power plant. Boilers are an important part of the production system of steam power plants. The problem in the boiler section is the relatively high damage frequency compared to other parts. The aim of this study is to propose a risk reduction strategy for critical boiler components using a failure mode approach and effect analysis (FMEA). The proposed damage risk reduction will prioritize important components that have the highest risk priority number (RPN). The strategy that was successfully formulated was for the cyclone separator component, to carry out periodic and scheduled preventive checks and maintenance, especially on the return leg to prevent the accumulation of solid particles in the fluid system. Primary air fans and induced draft fan components, they must perform standard operational procedures (SOP) when operating the fan so that they do not experience high vibrations, and routinely balance the rotor contained in the fan. As for the coal feeder components, monitor the coal flow in detail so that it does not accumulate at one particular point, which can cause leakage at the outlet flanges.
Penggunaan Moving Average dan Exponential Smoothing untuk Memprediksi Kebutuhan Beras Raskin di Kota Banda Aceh Heri Tri Irawan; Iing Pamungkas; Fitriadi Fitriadi; Arhami Arhami; Khairul Hadi; T.M Azis Pandria
Jurnal Optimalisasi Vol 6, No 2 (2020): Oktober
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v6i2.2554

Abstract

This study uses moving average and exponential smoothing methods to predict the demand for Raskin rice in Banda Aceh. The Logistics Agency (Bulog) is a food institution in Indonesia that organizes a rice trading system, which functions to provide rice distribution services to the public. The fluctuation in demand for Raskin rice in Banda Aceh makes it difficult for Bulog to predict future needs. In addition, the excess supply of Raskin rice will also be very detrimental because rice is a staple that is perishable. Therefore, it is necessary to conduct research to predict the demand for Raskin rice in Banda Aceh. The results of forecasting or prediction by comparing two methods and three errors in forecasting accuracy, it can be concluded that the exponential smoothing method with α = 0.90 can be used to predict the demand for Raskin rice in Banda Aceh City. The prediction result of the demand for raskin rice in Banda Aceh is 92,407 tons, with an MAD error rate of 4.92, MSE 34.58, and MAPE 0.006%, or having the smallest value compared to the 7-month moving average method.
Analisis Postur Kerja Menggunakan Metode Ovako Work Analysis System (OWAS) pada UKM Pengolahan Ikan Khairul Hadi; Iing Pamungkas; Risnadi Irawan; Abdiel Khaleil Akmal; Heri Tri Irawan; Adib Adib
Jurnal Optimalisasi Vol 7, No 2 (2021): Oktober
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v7i2.4436

Abstract

UKM Stefen Aluy is one of the businesses engaged in processing fresh fish into salted fish. When conducting preliminary research in the field, several causes of Musculoskeletal Disorder (MSDs) complaints were found. The results of the preliminary study, 66.7% of workers complained of pain in the waist, 50% of workers complained of back and waist pain, 33.3% of workers complained of pain in the left and right elbows and 16.7% of workers complained of pain in the thighs. Cumulatively from the preliminary research conducted, the parameters of the level of pain complaints were 21.4%, moderate pain, 33.3% and 45.2% pain. If this condition is ignored continuously for a long time, it has the potential to cause injury or low back pain to workers. To identify and analyze work attitudes, the Ovako Work Analysis System (OWAS) method is used, which is a method to identify and analyze work attitudes. The results of the study concluded that based on biomechanical measurements of work postures, there were several work postures that were included in 3 (three) assessment categories, namely the work posture of moving fish at the sorting station, working posture of moving fish at the weeding station, and working posture of moving fish at the packaging station.
SIMULASI MONTE CARLO UNTUK MENENTUKAN KEANDALAN PADA BAGIAN BOILER DI PEMBANGKIT LISTRIK BERBASIS BATUBARA Iing Pamungkas; Heri Tri Irawan; Arhami Arhami; Muhammad Dirhamsyah
Jurnal Optimalisasi Vol 4, No 2 (2018): Oktober
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v4i2.1505

Abstract

PT. PLN (Persero) currently uses a lot of coal-based power plants or Steam Power Plants (PLTU) in carrying out its operational activities. Aceh Province has a PLTU located in Nagan Raya Regency and is owned by PT. PLN (Persero). The Nagan Raya power plant has two generating units with an installed capacity of 2x110 Megawatts. The highest frequency of interference or damage experienced by the boiler section and this is very influential on the Nagan Raya PLTU production system. Performance evaluation in terms of reliability is needed to minimize interference or damage. The purpose of this study is to determine the level of reliability using Monte Carlo simulations on each important component of the boiler section. Monte Carlo simulations will be used to predict the time between failure or time to failure (TTF) and time to repair (TTR) so that the level of reliability can be predicted in the future. Monte Carlo simulations basically produce uniformly distributed random numbers (0.1) and then convert them into non-uniform distributions using the inverse transformation method. Monte Carlo simulation results on eight critical components in the boiler section obtained time to failure (TTF) obtained were 260 hours to 1312 hours with a reliability value of 30% to 42%. While the time to repair (TTR) is 1,57 hours to 2,26 hours with a reliability value of 22% to 41%.
Penjadwalan Produksi Paving Block Pada CV. Nibo Corporation Banda Aceh Heri Tri Irawan; Iing Pamungkas; Arhami Arhami
Jurnal Optimalisasi Vol 6, No 1 (2020): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v6i1.2063

Abstract

This paper uses the Palmer method to schedule paving block production in CV. Nibo Corporation Banda Aceh. CV. Nibo Corporation is engaged in the production of paving blocks located in the city of Banda Aceh. Problems faced by CV. Nibo Corporation often produces excess paving blocks than the number of orders that results in product accumulation in the storage area. The purpose of this study is to schedule paving block production in CV. Nibo Corporation. Paving block production scheduling in CV. Nibo Corporation will use the Palmer method. This research begins by calculating each standard time for each job. From the scheduling results, the comparison between the initial factory work schedule is nine hours of work in one day, and twenty-four working days in a month. While scheduling using the palmer method is six hours of work in one day and twenty-four working days in a month, or nine hours of work in one work day and seventeen days in a month. Using the palmer method can reduce the difference in production and orders every month from 31.000 to 5.944, or 3.000 per month, thereby reducing the accumulation of paving block products.
ANALISIS RISIKO RANTAI PASOK KOMODITAS CENGKEH DI KECAMATAN SALANG KABUPATEN SIMEULUE Heri Tri Irawan; Iing Pamungkas; Muzakir Muzakir
Jurnal Optimalisasi Vol 5, No 2 (2019): Oktober
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v5i2.1256

Abstract

The concept of supply chain management is a new concept that sees all company activities as an integrated part. In this case the integration of the company in the upstream (upstream) in providing raw materials and integration in the downstream (downstream) in the process of product distribution and marketing. This study aims to analyze the supply chain system of clove commodities in Simeulue Regency which is more effective and efficient so that it can be applied by the community, especially clove farmers. The method used in this research is to use the HOR (House of Risk) method. From the house of risk mapping results, 6 selected risk agents will be used as consideration material in the preparation of mitigation actions, namely: A-7 (Inadequate transportation technique) with an ARP value of 330, A-3 (Lack of experience in finding supply of raw materials) with an ARP value of 288, A-13 (Non-compliance with clove shipping documents) with an ARP value of 276, A-9 (Ineffective communication) with an ARP value of 258, A-11 (Non-compliance with the agreement with the supplier of cloves) by default ARP 189 and A-15 (Failure of price negotiations with producers) with an ARP value of 126.
PENGUKURAN WAKTU KERJA KARYAWAN BENGKEL TOYOTA PT. DUNIA BARUSA DI KOTA BANDA ACEH Muzakir Muzakir; Heri Tri Irawan; Iing Pamungkas
Jurnal Optimalisasi Vol 4, No 1 (2018): April
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jopt.v4i1.1487

Abstract

The study aims to analyze the level of employee performance in the process of changing car oil in the workshop of PT. Barusa world. The study was conducted on operators who work in the car oil change section using the time study method. The study was conducted in several stages, namely preliminary observations and then followed by determining the number of observations, collecting data, conducting data processing, analyzing the results of data processing and finally concluding the results of research. The final result obtained in this study is the standard time needed to complete the process of changing car oil is 14.61 minutes with the number of operators as much as 2 people.
Co-Authors AA Sudharmawan, AA Abdiel Khaleil Akmal Abdiel Khaleil Akmal Abdiel Khaleil Akmal Abdiel Khaliel Akmal Adib Adib Adib Adib, Adib Arga, Dwi Prasiska Lena ARHAMI ARHAMI Arhami, Arhami Arie Saputra Arkanullah, Lian Arrazy Elba Ridha Aulia Agung Dermawan Azhar Azhar Azhar Bahri, M Irvanni Bismi Khairijal Danil Danil Dirhamsyah, Muhammad Fadjrin, Sitti Fajar Okta Widarta Fauza, Teuku Soleh Fitriadi Fitriadi Hasan Yudie Sastra Hasanuddin, Iskandar Hasnita Hasnita Hasnita, Hasnita Husni Husni Iing Pamungkas Iqbal, Mohd Irawan, Risnadi Kasmawati Kasmawati Khairul Hadi M. Dirhamsyah M. Dirhamsyah Mahmud Basuki Muhammad Ardiansyah Muhammad David Muzakir Muzakir, Muzakir Nissa Prasanti Nuzuli, Fajar Putra, Gaustama Risnadi Irawan Rita Hartati riza ulhaq Rizki Agam Syahputra Sofiyanurriyanti Sugeng, Santoso Syahputra, Riski Agam T. M. Azis Pandria Zhaqiri, Hazdfi