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All Journal World Chemical Engineering Journal Jurnal Rekayasa Teknologi dan Sains Terapan Teknologika Journal of Management and Industrial Engineering (JMIE)
Diki Muchtar Diki
STT Wastukancana
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Physics Other

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Merumuskan Formula Pakan Ayam Kampung Petelur Menggunakan Model Interval Linier Programing Diki Muchtar Diki
Jurnal Rekayasa Teknologi dan Sains Terapan Vol 4 No 1 (2022): Jurnal Rekayasa Teknologi dan Sains Terapan
Publisher : LPPM, Sekolah Tinggi Teknologi DR. KHEZ Muttaqien

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Abstract

ABSTRACTThere have been several researchs conducted on the feed formulation such as (Samuel Olugbenga .O et al, 2015) linier programing, (F.Zhang W.B.Roush, 2002) mutiple-objective programming, (Brigitta Ayu Kusuma Wardhany et al, 2017) Particle swarm optimization, (Nur Firra Hasjidla et al, 2018) Improved Particle swarm optimization, (I.U. Udo et al, 2011) linier programming, (Thuleswar Nath, 2014) linier programing without interval coefficient. This research is like a Thuleswar Nath research but uses interval data (interval coefficient) so that it requires a interval linear programming model in feed formulation that is the best and the worst case method (M.allohdadi,2012). This research aims to determine parameters and variables of model for feed formulations with a interval linear programming model and calculate the optimum solution to decide the total cost required according to the nutrients needed. The data is processed using the best and the worst case method (interval linear programming) than after that it is optimized using linear programming software. Optimum solution of the worst case is 587.958.1, with the consentrate (x1) 43,52 kg, Corn (x2) 42,41 kg, Rice Bran (x3) 0 kg, Tofu Dregs (x4) 6,43 kg , Cassava Dregs (x5) 7,62 kg. And than optimum solution of the best case is 425.686.6, with the consentrate (x1) 29,62 kg, Corn (x2) 51,02 kg, Rice Bran (x3) 2,51 kg, Tofu Dregs (x4) 6,20 kg , Cassava Dregs (x5) 10,63 kg.
Usulan Perbaikan Sistem Perawatan Mold Injeksi Shround Fan 8701 Menggunakan Metode Failure Mode Effect Analysis dan Fault Tree Analysis di PT. XYZ Hedi Iskandar; Diki Muchtar Diki; Indra Gumelar; Yayah Ruqiyah
Jurnal Rekayasa Teknologi dan Sains Terapan Vol 4 No 2 (2023): Jurnal Rekayasa Teknologi dan Sains Terapan Vol. 4 No. 2
Publisher : LPPM, Sekolah Tinggi Teknologi DR. KHEZ Muttaqien

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PT XYZ merupakan salah satu perusahaan yang bergerak dibidang manufaktur jenis jasa injeksi plastik berbagai komponen otomotif kendaraan roda roda empat khususya kendaraan mobil, pada saat proses produksi salah satu mold belum siap produksi maka harus dilakukan change planning yaitu diganti ke mold yang sudah siap produksi. Penelitian ini menggunakan metode Failure Mode Effect Analysis untuk mengeidentifikasi failure mode dan mengetahui nilai risk priority number yang paling tinggi, Fault Tree Analysis untuk menentukan konsekuensi kegagalan yang ditimbulkan dari failure mode dan menentukan kebijakan perawatan mold injeksi shround fan 8701 untuk komponen dengan nilai Risk Priority Number tertinggi, dari hasil Failure Mode Effect Analysis nilai Risk Priority Number tertinggi yaitu 164 yang terdapat pada komponen Surface Mold (SFC). Dari hasil dengan menggunakan Fault Tree Analysis maka diketahui akar penyebab breakdown mold pada mold injeksi shround fan 8701 ada dua faktor yaitu flash dan colar U sulit dipasang, untuk kebijakan perawatan pada komponen tersebut dengan menerapkan corrective action yaitu tambal magnet colar dengan locktite dan Finishing dudukan colar U pada cavity dan core.
PERENCANAAN PENJADWALAN KAPASITAS PRODUKSI SELULOSA DENGAN MENGGUNAKAN METODE ROUGHT CUT CAPACITY PLANNING Gumelar, Indra; Wardhana, Rhanu; Throriq, Iman; Muchtar, Diki
Journal of Management and Industrial Engineering (JMIE) Vol. 2 No. 2 (2023): SEPTEMBER
Publisher : LPPM Sekolah Tinggi Teknologi Nusantara Lampung

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Perkembangan mode dari waktu ke waktu membuat kebutuhan sandang terus mengalami peningkatan, perusahaan kurang mampu mengelola sumber daya yang digunakan tidak dapat memenuhi kebutuhan konsumen dengan tepat dan cepat, masalah ini sering kali terjadi di PT MNO banyaknya kelebihan produk di Department Viscose (selulosa), sehingga jumlah produksi melebihi permintaan, mengakibatkan sistem perencanaan kapasitas produksi di perusahaan belum optimal, tujuan penelitian ini untuk mengetahui perbaikan apa yang harus dilakukan untuk memperbaiki perencanaan kapasitas produksi di PT MNO. Berdasarkan analisa menggunakan metode Rough Cut Capacity Planning (RCCP), maka perusahaan memerlukan adanya penambahan tenaga kerja. Karena pada PT MNO proses produksinya kontinyu dan perusahaan menggunakan 5 hari kerja dengan 2 shift per hari, sehingga pada proses produk perlu dilakukan jam lembur lagi dan penambahan tenaga kerja.
MENINGKATKAN EFISIENSI BIAYA PRODUKSI DENGAN MENGGUNAKAN METODE JUST IN TIME PADA HOME INDUSTRY KERUPUK RAIHAN PURWAKARTA Sagita, Laela; Iskandar, Hendi; Yudhanegara, Darmawan; Muchtar, Diki
Journal of Management and Industrial Engineering (JMIE) Vol. 2 No. 2 (2023): SEPTEMBER
Publisher : LPPM Sekolah Tinggi Teknologi Nusantara Lampung

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Penelitian ini bertujuan untuk mengetahui penerapan metode Just InTime dalam meningkatkan efisiensi biaya produksi pada home industri kerupuk raihan. Pengumpulan data dilakukan dengan wawancara, observasi dan studi dokumentasi. Data yang diolah adalah laporan persediaan tahun 2022. Teknik perhitungan yang digunakan adalah menghitung total biaya produksi berdasarkan kebijakan perusahaan, metode EOQ, dan metode JIT/EOQ, serta menghitung siklus penjadwalan produksi. Berdasarkan hasil perhitungan disimpulkan bahwa kebijakan pengendalian persediaan yang dilakukan perusahaan belum maksimal terlihat dari total biaya produksi yang dikeluarkan sebesar Rp.5.952.274,- dibandingkan dengan metode JIT/EOQ sebesar Rp.1.463.008,-sehingga total biaya yang dihemat sebesar Rp.4.489.226,-
Simulasi Sistem Antrian Pembelian Tiket Kereta Api Menggunakan Aplikasi Promodel (Studi Kasus di Stasiun Purwakarta) Muchtar, Diki; Hadi Putri , Puspita; Thoriq, Iman; Jamaludin, Wanwan
Journal of Management and Industrial Engineering (JMIE) Vol. 3 No. 1 (2024): MARET
Publisher : LPPM Sekolah Tinggi Teknologi Nusantara Lampung

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Purwakarta Station, as one of the busiest train stations in Indonesia, often experiences passenger congestion, especially during peak hours. Not only does this cause inconvenience to passengers, but it can also pose a safety risk. The purpose of this study is to improve the efficiency and safety of train passenger queues. This research uses Promodel software. The results of this study found that there was no waiting presentation and down presentation. Meanwhile, there is a percentage of delay in the location of entering the counter and exiting the counter. Presentations were blocked by 4.47% and the percentage of counter exit was 52.89%. This means that there is no significant buildup in the simulation of the train ticket purchase queue system at Purwakarta Station).
SIMULASI SISTEM ANTRIAN LOKET PARKIR KENDARAAN DI MALL STS (SADANG TERMINAL SQUARE) Ihsan, Muhammad Ihsan; Dimas Wismono; Diki Muchtar
Jurnal Teknologika Vol 14 No 1 (2024): Jurnal Teknologika
Publisher : Sekolah Tinggi Teknologi Wastukancana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51132/teknologika.v14i1.380

Abstract

Vehicle queues formed in front of the gate of the ticket collection counter at STS Mall can cause problems and queue lengths that can interfere with other traffic movement systems. Therefore, it is very important to review the queuing system at the gate of the parking ticket collection counter at STS Mall. This study aims to examine the queuing system and determine alternatives to improve four-wheeled vehicle queuing services at the ticket collection counter to enter the parking lot at STS Mall. The main data needed in this study are vehicle arrival rates and counter service times. The data were obtained respectively using traffic enumeration methods and sampling observations, which were carried out at the entrance counter of four-wheeled vehicles and carried out on Saturdays and Sundays. The analysis method uses Queue Theory. The results of the analysis show that the number of counters 1 piece is still able to serve the current level of vehicle arrivals which gives a value of n ranging from 0.34 - 0.37 vehicles (( 1 vehicle) , q ranging from 0.08 - 0.06 vehicles (( 1 vehicle), d ranging from 8.2 - 8.6 seconds, and w ranging from 2.1 - 2.5 seconds. At an arrival rate above 600 vehicles / hour are no longer able to be served with the number of counters (N) as much as 1 piece without improving the queuing system
OPTIMASI DISTRIBUSI KONVEKSI PAKAIAN DENGAN PENDEKATAN SIMULASI (STUDI KASUS CV. XYZ) Anisa Pauziah; Diki Muchtar; Muhamad Ihsan; Tarman
Journal of Management and Industrial Engineering (JMIE) Vol. 3 No. 2 (2024): SEPTEMBER
Publisher : LPPM Sekolah Tinggi Teknologi Nusantara Lampung

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One of the biggest challenges faced by garment manufacturing companies is optimizing the distribution of products to improve operational efficiency and minimize costs. Timely and effective distribution is crucial to ensure customer satisfaction and maintain the company's competitiveness. Therefore, efforts need to be made to optimize the distribution system in garment manufacturing companies by utilizing the latest technology, one of which is through simulation approaches. The aim of this research is to apply simulation to optimize the clothing distribution at CV. XYZ and provide recommendations for improving efficiency and reducing distribution costs. To achieve the research objectives, a case related to the distribution system was selected and analyzed in depth, specifically at CV. XYZ. To analyze this case, this research employs a case study strategy focusing on data collection from relevant distribution systems. One of the tools used to describe the distribution process systematically is a flowchart, which provides a visual overview of the sequence and relationships between various stages in the distribution process. The simulation results indicate that the distribution system at CV. XYZ could be improved by increasing the schedule from once to twice, rather than by adding distribution units. In terms of costs, this approach reduces the expenses, with the additional schedule only adding a fuel cost of IDR 46,800,000, while adding units would incur a cost of IDR 615,600,000.
Line Balancing with Simulation Approach (ProModel) on SMC Big Volume Lane in HA Export Department at PT. XYZ Purwito, Dewanto Djoko; Ramlan Yuniar Velani; Diki Muchtar; Handayani , Suci Tresna Dewi
Jurnal Teknologika Vol 15 No 1 (2025): Jurnal Teknologika
Publisher : Sekolah Tinggi Teknologi Wastukancana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51132/teknologika.v15i1.456

Abstract

This research aims to identify and overcome bottlenecks in production process at PT. XYZ Indonesia, especially in HA Export Department on SMC Big Volume Lane. Bottlenecks were detected in Visual Acc and Housing processes, which resulted in decreased efficiency and productivity. The method used in this study is line balancing with the Pro Model simulation approach, which allows analysis of improvement scenarios without disrupting ongoing operations. Data collected includes process time and machine capacity. Initial simulation results showed significant idle time 15,4%, with accumulation at Raw Material workstation (12.30%), Housing workstation (1.20%), and Visual Acc (1.90%). After the improvements were made, including increasing the Raw Material capacity to 20 pcs, the Housing process to 3 pcs, and Visual Acc to 3 pcs, the bottleneck was successfully eliminated from 15.4% became 0% and the production flow became more stable. This research provides practical solutions to improve efficiency and reduce cycle time, and can be a reference for companies in implementing line balancing and simulation methods to improve productivity in the manufacturing industry.
Bottleneck Analysis in Garment Production Process Using Simulation Approach (ProModel) Muchtar, Diki
Jurnal Teknologika Vol 15 No 1 (2025): Jurnal Teknologika
Publisher : Sekolah Tinggi Teknologi Wastukancana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51132/teknologika.v15i1.457

Abstract

Garment industry is a labor-intensive manufacturing sector with a complex production flow, highly susceptible to bottlenecks. Unresolved bottlenecks can lead to decreased efficiency, increased waiting times, and reduced productivity. This research aims to analyze bottlenecks in the garment production process using a simulation approach with ProModel software. The research method was carried out using a quantitative-descriptive approach, starting with production system selection, process flow mapping, and simulation model development and testing. The results of the original model simulation show a production output of 1.719 units, with a bottleneck of 3,86% and a cost of USD 38,01. This situation requires improvement, which was achieved through scenario 1, where production capacity at each location was increased, considering a relatively similar cost of USD 41,40. This change reduced the bottleneck to 0,60%, and total production increased to 1.811 units. In scenario 2, with a similar cost, the author recommended further adjustments to the production capacities at the required processes. After conducting the simulation, total production increased to 1.908 units, with a cost of USD 41,42. The simulation using ProModel proved effective in systematically identifying and evaluating bottleneck solutions. This research provides practical recommendations for garment industry management in making data-driven decisions to improve production efficiency. keyword: Bottleneck; Garment Industry; Simulation; ProModel; Production Efficien
Analysis of Quality Control of Drawn Textured Yarn Using Six Sigma Method at Indorama Engineering Polytechnic Production Unit Ulum, Rikzan Bachrul; Agassi, Andre; Muchtar, Diki
World Chemical Engineering Journal VOLUME 9 NO. 1 JUNE 2025
Publisher : Chemical Engineering Department, Engineering Faculty, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/wcej.v9i1.33651

Abstract

Drawn textured yarn is one of the production outputs of the Vocational Training Center at Politeknik Enjinering Indorama, a partner of PT Indorama Synthetics Tbk. In its production process at the Vocational Training Center of Politeknik Enjinering Indorama, product defects are still encountered. To reduce product defects, the Six Sigma method with DMAIC approach is employed. For companies prioritizing product quality, quality control over the products must be conducted. This can manage and control the number of rejected or damaged products that could potentially harm the company's reputation in the eyes of consumers when the products are marketed.
Co-Authors Agassi, Andre Anisa Pauziah Darmawan Yudhanegara Dimas Wismono Hadi Putri , Puspita Handayani , Suci Tresna Dewi Hedi Iskandar Herdiansyah, Ferry Ihsan, Muhammad Ihsan Indra Gumelar Indra Gumelar Iskandar, Hendi Jamaludin, Wanwan Laela Sagita Muhamad Ihsan Purwito, Dewanto Djoko Ramlan Yuniar Velani Suci Tresna Dewi Handayani Tarman Thoriq, Iman Throriq, Iman Ulum, Rikzan Bachrul Wardhana, Rhanu Yayah Ruqiyah