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ANALISIS BOTTLENECK DAN PENINGKATAN KINERJA LINI PRODUKSI PADA INDUSTRI MAKANAN DENGAN PENDEKATAN SIMULASI Baihaqy, Ahmed Raecky; Muhammadi, Hamdan; Siswanto, Nurhadi
JISO : Journal of Industrial and Systems Optimization Vol. 8 No. 1 (2025): Juni 2025
Publisher : Universitas Maarif Hasyim Latif

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51804/jiso.v8i1.1-9

ABSTRAK Sebuah lini produksi dirancang untuk memastikan bahwa aktivitas produksi berlangsung lancar dengan output maksimal. Namun, kelancaran lini produksi dapat terganggu jika terjadi bottleneck dalam aktivitas atau proses tertentu, yang dapat menurunkan tingkat produksi secara signifikan. Penelitian ini bertujuan untuk mengidentifikasi dan menganalisis bottleneck dalam lini produksi industri makanan menggunakan pendekatan simulasi. Hasil simulasi kondisi eksisting menunjukkan bahwa proses packing menjadi bottleneck utama. Melalui skenario perbaikan berupa kombinasi penugasan mesin manual packing yang lebih fleksibel dan penambahan konveyor, simulasi membuktikan bahwa throughput produksi per jam dapat meningkat sebesar 8,6%. ABSTRACT A production line is designed to ensure that production activities run smoothly and achieve maximum output. However, its smooth operation can be disrupted if a bottleneck occurs in certain activities or processes, significantly reducing the production rate. This research aims to identify and analyze bottlenecks within a food industry production line using a simulation-based approach. The simulation results of the existing conditions indicate that the packing process is the primary bottleneck. Through an improvement scenario involving a combination of more flexible manual packing machine assignments and the addition of conveyors, the simulation demonstrated that hourly production throughput could increase by 8.6%.

Modeling of Supplier Selection Strategy And Raw Material Order Allocation With Analytic Hierarchy Process Approach and Linear Programming at PT. IKSG Zulaihan, Ahmad; Siswanto, Nurhadi
Eduvest - Journal of Universal Studies Vol. 5 No. 4 (2025): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v5i4.17484

The dynamics and challenges of the business environment require companies to adapt quickly and responsively to changes. The ability to meet customer expectations through quality products and services at competitive prices is the key to the company's sustainability. A reliable supply chain plays an important role in this matter, not only ensuring economic efficiency, but also paying attention to social and environmental aspects. Trusted suppliers are the main support to ensure the availability of quality raw materials, competitive costs, and are supported by good after-sales service. This research aims to develop an integrated model to overcome the problem of supplier selection and raw material order allocation at PT. IKSG. The model combines the Analytic Hierarchy Process (AHP) and Linear Programming approaches. AHP is used to objectively evaluate and determine the best supplier selection, while Linear Programming allocates the optimal order quantity to each of the selected suppliers. The study's results successfully identified the criteria for selecting suppliers that support the concept of sustainability. The three main criteria obtained were economic (weight 63.16%), environment (weight 26.67%), and social (weight 10.17%). Economic criteria have subcriteria of quality, cost, availability, flexibility, delivery, and finance. Environmental criteria have subcriteria for waste management, reputation, and environment-related certificates. Social criteria have subcriteria for the rights of employees, working hours, and worker safety. From the evaluation of six alternative suppliers, the three best suppliers were selected. The optimal allocation of raw material orders is allocated to SDP (S1), PT (S5) and SCG (S6) in order.

Optimasi Rute Penggantian Kwhmeter Pascabayar dengan K-Means dan Algoritma Genetika Dewandhika, Defriko Christian; Siswanto, Nurhadi
COMSERVA : Jurnal Penelitian dan Pengabdian Masyarakat Vol. 5 No. 3 (2025): COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/comserva.v5i3.3244

This research is driven by the need of PLN Distribution Main Unit to mitigate the extreme risk of high account balances on the 21st of each month, which can disrupt cash flow and financial performance. One mitigation strategy is replacing conventional kWh meters with Advanced Metering Infrastructure (AMI), or two-way meters, which allow remote disconnection. The purpose of this study is to prioritize customers for meter replacement based on limited material availability and to optimize replacement routes under restricted team resources. The method used involves the K-means algorithm for customer segmentation, validated by silhouette score, which resulted in six optimal clusters. Genetic algorithm was then applied to determine the most efficient routes based on distance and time. The results showed that the optimal route had a minimum total travel distance of 1,434.29 km and a total time of 18,868.58 minutes, using a population size of 50 chromosomes and 500 generations. This study is expected to offer an effective solution for improving operational efficiency and risk mitigation at PLN.

Improving Coal Loading and Unloading Performance at Loading and Unloading Terminals with Lean Thinking Concept Ridho, Alvin Ichwannur; Siswanto, Nurhadi
Journal Research of Social Science, Economics, and Management Vol. 4 No. 12 (2025): Journal Research of Social Science, Economics, and Management
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jrssem.v4i12.927

The coal mining logistics industry in Indonesia has a strategic role as the world's largest coal producer, with a significant contribution to state revenue. This study aims to analyze the main obstacles, wastes that occur, and proposed improvements in the coal loading and unloading process at PT XYZ to increase efficiency and productivity through a lean thinking approach. The methodology of this research includes a qualitative approach through value stream mapping and quantitative using fishbone diagrams to produce a comprehensive analysis. The analysis is carried out through process activity mapping, the preparation of current state maps, and the design of future state maps to provide suggestions for improvement. Based on the results of the study, several recommendations for improvement were obtained from the results of the analysis on coal unloading or loading activities which included Value Added (VA) or Necessary but Non-Value Added (NNVA). The proposed improvements include the application of double crossing dismantling methods, digitization of administrative processes, and the use of drone technology to facilitate the physical inspection process in the field. If the proposal can be implemented, there will be an increase in the time effectiveness of coal loading and unloading activities by 14.20%, with details of unloading activities increasing by 25.30% or from 1,004 minutes to 750 minutes, and coal loading activities by 3.10% or from 3,067 minutes to 2,972 minutes.

Control of Key Distribution Material Requirements (MDU) in Meeting the Demand for New Installations and Power Changes in Utility Companies Syaputra, Oktavian; Siswanto, Nurhadi
Journal of Social Research Vol. 4 No. 9 (2025): Journal of Social Research
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/josr.v4i8.2741

Inventory control in utility companies is crucial due to its potential to improve the achievement of sales revenue ratios in serving New Connection (PB) and Power Change (PD) requests. In inventory management, accurate demand planning is essential to minimize both excess and shortage of materials. The inaccuracy in calculating inventory parameters for Distribution Main Materials (MDU), especially for PB and PD, is primarily due to the lack of consideration for demand uncertainty, often resulting in stockouts or overstock. This study aims to optimize inventory management and minimize MDU inventory costs based on the company's inventory policy by classifying MDU according to criticality levels ABA, ABB, and ABC. Short-term forecasting is conducted using exponential smoothing or double exponential smoothing, selecting the method with the smallest forecasting error. Inventory parameters are calculated using the Continuous Review (s,S) and Periodic Review (R,s,S) methods, compared against the company's current condition, and the most optimal policy is selected under stochastic demand conditions. After selecting the best parameters among the three policies, total inventory cost and Service Level per MDU are calculated using Material Requirement Planning (MRP) simulation. By applying inventory policy parameters using the Periodic Review method (R,s,S), the total inventory cost and Service Level for each MDU classification (ABA, ABB, ABC) vary, with an average inventory cost of IDR 76 billion for ABA, IDR 3.6 billion for ABB, and IDR 844 million for ABC, and a Service Level of 98%. This allows the company to achieve inventory cost savings of up to 70% within 36 months compared to the current condition.

Optimasi Rute Penggantian Kwhmeter Pascabayar dengan K-Means dan Algoritma Genetika Dewandhika, Defriko Christian; Siswanto, Nurhadi
COMSERVA : Jurnal Penelitian dan Pengabdian Masyarakat Vol. 5 No. 3 (2025): COMSERVA: Jurnal Penelitian dan Pengabdian Masyarakat
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/comserva.v5i3.3244

This research is driven by the need of PLN Distribution Main Unit to mitigate the extreme risk of high account balances on the 21st of each month, which can disrupt cash flow and financial performance. One mitigation strategy is replacing conventional kWh meters with Advanced Metering Infrastructure (AMI), or two-way meters, which allow remote disconnection. The purpose of this study is to prioritize customers for meter replacement based on limited material availability and to optimize replacement routes under restricted team resources. The method used involves the K-means algorithm for customer segmentation, validated by silhouette score, which resulted in six optimal clusters. Genetic algorithm was then applied to determine the most efficient routes based on distance and time. The results showed that the optimal route had a minimum total travel distance of 1,434.29 km and a total time of 18,868.58 minutes, using a population size of 50 chromosomes and 500 generations. This study is expected to offer an effective solution for improving operational efficiency and risk mitigation at PLN.

Maintenance Strategy for Pressure Vessel at Offshore Platform Using RBI Method Ali Reza, Muhammad; Zaman, Muhammad Badrus; Siswantoro, Nurhadi
International Journal of Marine Engineering Innovation and Research Vol 8, No 4 (2023)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i4.19550

The increasing complexity of installations and operations of oil and gas facility, the growing public awareness need to ensure higher levels of safety have give a high pressure to designers and operators to find innovative solution to ensure a safe and economically viable operation. RBI is one of the solution can be used. RBI is a popular method and trusted for measure and develop inspection plan also provide many advantage such as plant availability, decrease failure happen, decrease risk level based on its failure and decrease inspection cost caused for production facility. The use of RBI can help in determining the inspection schedule of pressure vessel V-001 at offshore platform. RBI method determine the risk level of the object by calculate the probability of failure and consequence of failure of the object based on API 581. The result obtained for probability of failure V-001 is 0.000127099 (left head), 0.000123717 (shell) and 0.000131098 (right head) and the consequence of failure is 438.934 m2. The risk analysis of V-001 is categorized as medium level with recommendation inspection is 5 years for external inspection and 10 years for internal inspection with recommendation inspection use ultrasonic test, visual test, edy current and radiographic test.

Filosofi Kepemimpinan Semar Siswanto, Nurhadi
PANGGUNG Vol 29 No 3 (2019): Transformasi Bentuk dan Nilai dalam Seni Budaya Tradisi
Publisher : LP2M ISBI Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26742/panggung.v29i3.1011

ABSTRACT As a big nation with cultural diversity, Indonesia needs a strong leadership based on the values, characters and culture of the society. All crises faced by Indonesian people today, is primarily a moral crisis. These multidimensional crises have triggered to dig the noble values as references to do and to act. This paper discusses abaut the leadership philosophy of Semar, by which some teachings and moral values of Semar are connected with the leader's characters and attitudes. This is explorative and analytical literature research by using hermeneutic, semiotic and iconographic approaches, to find the meanings of Semar characters. Semar is the Panakawan figure who symbolically teaches about being a good human or a good leader. Some teachings and characters of Semar include the leader will not glorify his inheritance and origin, the leader must be wise, think and view broadly, the leader can't be anti-critics, the leader should be easily caring of the suffer of the people, the leader must be ready to serve the society in any condition, and also can respect the previous leader’s achievements and cover up his badness (mikul duwur mendem jero) Keywords: Panakawan, Semar, leadership philosophy ABSTRAK Sebagai bangsa yang besar dengan berbagai ragam budaya, Indonesia membutuhkan kepemimpinan yang kuat, yang bersumber dari nilai kepribadian masyarakat dan budayanya. Berbagai krisis yang ada saat ini, yang paling memprihatinkan adalah krisis moral. Berbagai krisis tersebut menjadikan pentingnya penggalian nilai-nilai luhur bangsa yang dapat dijadikan acuan dalam berpijak dan bertindak.Tulisan ini mengkaji tentang nilai nilai filosofis yang ada pada Semar dikaitkan dengan kepemimpinan. Penulis mencoba mengkaji berbagai ajaran dan nilai moral Semar dikaitkan dengan sifat dan sikap seorang pemimpin. Penelitian ini merupakan penelitian kepustakaan dengan metode penelitian eksploratif deskriptif. Penelitian ini menggunakan metode hermeneutika, semiotika, dan ikonografi untuk mengkaji berbagai makna simbolis yang ada pada tokoh Semar.Semar adalah tokoh Panakawan yang secara simbolis mengajarkan tentang bagaimana menjadi manusia atau pemimpin yang baik. Berbagai sifat dan ajaran tersebut antara lain pemimpin tidak akan mengagungkan keturunan dan asal usulnya, pemimpin harus (temuwo) berfikir dan berpandangan luas dan dalam, pemimpin tidak boleh anti kritik, pemimpin seharusnya mudah terharu terhadap penderitaan rakyat, pemimpin harus selalu siap melayani dalam kondisi apapun, serta pemimpin harus bisa mikul dhuwur mendehem jero (menghargai hasil pemimpin sebelumnya dan menutupi segala keburukan yang ada). Kata Kunci: Panakawan, Semar, Filosofi Kepemimpinan

Motorcycle Taxi in Shared Mobility and Informal Transportation: A Bibliometric Analysis Herawatie, Dyah; Siswanto, Nurhadi; Widodo , Erwin
Journal of Information Systems Engineering and Business Intelligence Vol. 10 No. 2 (2024): June
Publisher : Universitas Airlangga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20473/jisebi.10.2.250-269

Background: Motorcycle taxi (MCT) is a form of widely used informal transportation. Over the last few years, MCT has developed from conventional public transportation into a modern business using digital technology. In these services, digitalization has received a positive response from the public and the increasing number creates many challenges. However, there is a gap in the discussion of new service models for shared mobility transportation. Objective: This research aimed to analyze MCT, providing an overview of the services as informal transportation. Methods: Bibliometric analysis was used to evaluate 366 articles published in the Scopus database between 2011-2023. In addition, annual publications and citation topics, most productive sources and influential articles, relevant affiliations, productive countries, location research, main topics, and future research options were identified. Results: Frequently occurring topics were reported with past and present academic developments related to MCT services. Based on the publication themes, the main topics were arranged into five clusters, namely (a) the development of more sustainable transportation services, (b) environmental and health impact, (c) road safety, (d) risky behaviors or risk factors as MCT drivers, and (e) utilization of MCT for medical or health services. Meanwhile, the research topics comprised themes about travel behavior, health, safety-security, customer satisfaction, and advanced mobility topics. Conclusion: This research increased knowledge about main topics, trends and future analysis options in MCT. The academic developments served as a guide to future topics. Keywords: Motorcycle taxi, public transportation, informal transportation, shared mobility, bibliometric analysis

Improving Coal Loading and Unloading Performance at Loading and Unloading Terminals with Lean Thinking Concept Ridho, Alvin Ichwannur; Siswanto, Nurhadi
Journal Research of Social Science, Economics, and Management Vol. 4 No. 12 (2025): Journal Research of Social Science, Economics, and Management
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jrssem.v4i12.927

The coal mining logistics industry in Indonesia has a strategic role as the world's largest coal producer, with a significant contribution to state revenue. This study aims to analyze the main obstacles, wastes that occur, and proposed improvements in the coal loading and unloading process at PT XYZ to increase efficiency and productivity through a lean thinking approach. The methodology of this research includes a qualitative approach through value stream mapping and quantitative using fishbone diagrams to produce a comprehensive analysis. The analysis is carried out through process activity mapping, the preparation of current state maps, and the design of future state maps to provide suggestions for improvement. Based on the results of the study, several recommendations for improvement were obtained from the results of the analysis on coal unloading or loading activities which included Value Added (VA) or Necessary but Non-Value Added (NNVA). The proposed improvements include the application of double crossing dismantling methods, digitization of administrative processes, and the use of drone technology to facilitate the physical inspection process in the field. If the proposal can be implemented, there will be an increase in the time effectiveness of coal loading and unloading activities by 14.20%, with details of unloading activities increasing by 25.30% or from 1,004 minutes to 750 minutes, and coal loading activities by 3.10% or from 3,067 minutes to 2,972 minutes.

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