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All Journal Agrointek FLYWHEEL : Jurnal Teknik Mesin Untirta Teknika: Jurnal Sains dan Teknologi Journal Industrial Servicess Jurnal Ilmiah Teknik Industri Journal of Innovation and Technology Journal of Systems Engineering and Management
Asep Ridwan
Department Of Industrial Engineering, Faculty Of Engineering, Sultan Ageng Tirtayasa University
Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Proposed Action of Supply Chain Risk Mitigation Air Compressor Type L Unloading ¼ HP Using The Fuzzy – FMEA and Fuzzy – AHP Method in PT. XYZ Dyah Lintang Trenggonowati; Achmad Bahauddin; Asep Ridwan; Yuyun Wulandari
Jurnal Inovasi Teknologi Vol 2 No 1 (2021): April
Publisher : Engineering Forum of Western Indonesian Government Universities Board (Forum Teknik, BKS-PTN Wilayah Barat) Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/jit.v2i1.3204

Abstract

Established since the 80s, PT. XYZ is an air compressor manufacturing industry located in Tangerang, Indonesia. In the production process, the Air compressor type L Unloading 1/4 HP has a very complex supply chain network which makes the supply chain network activities experience obstacles in the form of risks or potential risks that can occur so that it can disrupt the smooth running of the supply chain activities of the air compressor type L. Unloading 1/4 HP. However, PT. XYZ has not maximally implemented risk mitigation actions in its supply chain. The purpose of this study is to propose a mitigation action against risk events that occur along the supply chain of water compressor type L Unloading 1/4 HP using the FFMEA (Fuzzy Failure Mode and Effect Analysis) and FAHP (Fuzzy Analytical Hierarchy Process) methods. Based on the research, there were 29 identified risk events with 5 priority risk events. And of the 5 priority risk events, each has 2 proposed mitigation actions per priority risk event
Proposed Improvement on Supply Chain System to Minimize The Bullwhip Effect Phenomenon with Monte Carlo Simulation Approach Dyah Lintang Trenggonowati; Maria Ulfah; Asep Ridwan; Rasie Arthafia
Jurnal Inovasi Teknologi Vol 2 No 2 (2021): October
Publisher : Engineering Forum of Western Indonesian Government Universities Board (Forum Teknik, BKS-PTN Wilayah Barat) Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31629/jit.v2i2.3854

Abstract

PT XYZ is one of the most company which produce welded steel pipe in Indonesia such as longitudinal and spiral pipes. In order to meet consumer’s demand, this company faced with an obstacle namely the distortion of information in supply chain. Distortion of information from downstream to upstream channel causes the difference between the product demand from consumer to PT XYZ and order of raw materials from PT XYZ to the supplier which is called the bullwhip effect. The objective of this research is to calculate the value of bullwhip effect as well as designing improvements to minimize the bullwhip effect. Based on the research results, obtained the index value of bullwhip effect on longitudinal pipe products is 1.06 and the index value of bullwhip effect on spiral pipe products is 0.80. The improvement design to minimize the phenomenon of bullwhip effect is to build an integrated information system for the customer, manufacturer, and supplier. The method that is used to improve the index value of bullwhip effect is Monte Carlo simulation. Monte Carlo simulation is used to obtain the order number of raw materials in order to approach the number of consumer’s demand. After applying the Monte Carlo simulation, obtained the index value of bullwhip effect on longitudinal pipe product is 1.01 and the index value of bullwhip effect on spiral pipe products is 1.00. It can be concluded that the use of Monte Carlo simulation had been optimizing the index value of bullwhip effect amounted to 4.71% for longitudinal pipe products and 25% for spiral pipe products.
Analisis komparasi strategi lokasi fasilitas sentralisasi dan desentralisasi perencanaan distribusi produk Dyah Lintang Trenggonowati; Maria Ulfah; Asep Ridwan; Achmad Bahauddin; Kulsum Kulsum
Journal Industrial Servicess Vol 8, No 1 (2022): June 2022
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/jiss.v8i1.14471

Abstract

Kegiatan urbanisasi yang berkembang cepat memicu pemecahan masalah lokasi fasilitas dan ukuran lokasi fasilitas menjadi masalah penting dalam perencanaan tata ruang pendistribusian produk. Karena lokasi dan skala regional yang semakin kompleks, kepuasan pelanggan menjadi sangat terpengaruh. Penelitian ini mengoptimalkan multi tujuan lokasi fasilitas dan efisiensi penentuan lokasi fasilitas. Masalah utama pada penelitian ini adalah membandingkan kelayakan operasional dan implikasi dari efisiensi penetapan jalur dan lokasi fasilitas distribusi antara skema tersentralisasi dan desentralisasi. Untuk mendapatkan solusi yang layak, kombinasi pendekatan optimis dan pesimis dipertimbangkan. Studi kasus penelitian ini adalah UMKM (Usaha Mikro Kecil dan Menengah) XYZ di Kota Bogor, Indonesia.  Identifikasi problem dilakukan secara menyeluruh di UMKM XYZ baik secara sentralisasi maupun desentralisasi. Pengolahan data dilakukan dengan menilai alokasi sumber daya di UMKM Pusat dan lima titik cabang, dilanjutkan mengukur dan menganalisis kelayakan operasional dan implikasi biaya dengan metode BEP (Break Even Point) dalam rantai pasokan selama pendistribusian produk. Hasil penelitian ini menunjukkan bahwa skenario yang diusulkan memungkinkan untuk memberikan skema optimasi berorientasi tujuan tergantung pada preferensi pembuat keputusan.  Break Even Analysis pada penelitian ini mampu menyelesaikan dan memberikan solusi bagi UMKM dalam menentukan lokasi fasilitas secara independen.
Analysis of occupational health and safety at a maritime warehouse using Hazard Identification, Risk Assessment and Risk Control (HIRARC) Asep Ridwan; Apriansyah Nuroni; Adelia Adelia; Atia Sonda
Journal Industrial Servicess Vol 8, No 2 (2022): October 2022
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/jiss.v8i2.17293

Abstract

This study aims to identify and determine risks and risks using the Hazard Identification Risk Assessment and Risk Control (HIRARC) method. By conducting prior monitoring and interviewing workers to find out the risks and impacts experienced by workers. Making a HIRARC table by assessing each aspect of hazards, work risks and controls that have been carried out and classifying controls based on 5 hierarchies. Data processing is conducted by analyzing the potential hazards with the HIRARC method. This study identified 12 potential hazards at Gandasari Energy. The findings of 12 risks can be carried out by risk with a hierarchy where there are 5 risk control efforts, including elimination, substitution, engineering control, administrative control, and personal protective equipment. Of the 12 potential hazards, many workers still do not use Personal Protective Equipment (PPE). The importance of PPE is to minimize the occurrence of work accidents.
A fuzzy FMEA for detecting the risk of defects in polyethylene (PE) film products Erni Krisnaningsih; Imam Ribowo Sakti; Saleh Dwiyatno; Asep Ridwan
Journal Industrial Servicess Vol 8, No 2 (2022): October 2022
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/jiss.v8i2.16592

Abstract

Product quality is a top priority that must be considered so that the products produced follow quality standards based on the characteristics and specifications set by the company. This study aims to identify the failure risk of the most dominant type of defect in Polyethylene (PE) Film products and identify the significant factors that cause the most dominant defects so that a proposal for improvement is obtained. The Fuzzy Failure mode and effect analysis (FFMEA) method is applied to reduce the risk of product defects in the PE Film production process. The steps with FFMEA are: a). Identify the type of defect of the Polyethylene film product, b). investigate the potential causes of each mode of failure and their impact, c). Identify the scale and linguistic terms for the input factors S, O, and D. d). Create a membership function appropriate for S, O, and D input factors, e). Change the input factor values S, O, and D to linguistic variables, f). establish an IF-Then rule, create a fuzzy risk priority number (FRPN) membership function, g). defuzzification. The results showed that the application of this method was quite effectively applied, the risk factor for the dominant defect in the production of PE film was the type of Pinhole defect caused by material factors, and the production process and temperature with proposed improvements were focused on periodic maintenance.
Evaluating Economic and Environmental Impact of A Plastic Waste Processing Industry nased on Circular Economy using Benefit-Cost Analysis Asep Ridwan; Triwin R. Ambarwaty; Nuraida Wahyuni; Dyah L. Trenggonowati; Achmad Bahauddin; Ani Umyati; Bobby Kurniawan
Jurnal Ilmiah Teknik Industri Vol. 21, No. 2, December 2022
Publisher : Department of Industrial Engineering Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v21i2.19751

Abstract

Plastic has played a dominant role in human life as its usage is increasing over time. Plastic waste can harm the environment because plastic is not biodegradable. A collaboration adopted from the quintuple helix model was initiated by the local government of Cilegon, Indonesia, industry, and community to tackle the plastic waste problem. Plastic waste from households and industry is collected and processed in the plastic waste processing industry using the pyrolysis method producing gasoline, diesel, and kerosene. Kerosene is used by the community as fuel for cooking, whereas diesel and gasoline are used as boat fuels by fishermen. The collaboration is expected to provide economic and environmental benefits for the people in the Cilegon area. We conducted a cost and benefit analysis to evaluate the feasibility of this project from an economic and ecological point of view. The results will be used as input for conducting similar projects in other cities.
Aksi mitigasi risiko rantai pasok produk H-Beam menggunakan metode House of Risk Maria Ulfah; Dyah Lintang Trenggonowati; Putro Ferro Ferdinant; Faula Arina; Atia Sonda; Asep Ridwan; Achmad Bahaudin; Anting Wulandari
Journal of Systems Engineering and Management Vol 1, No 1 (2022)
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/joseam.v1i1.17586

Abstract

PT Sentra Karya Mandiri merupakan perusahaan yang berkembang dan bergerak di bidang pabrikasi baja (structural steel fabrication), spesialis alat berat (heavy equipment), serta konstruksi jembatan (steel bridge construction) sebagai core business perusahaan. Salah satu produk yang diproduksi oleh PT Sentra Karya Mandiri adalah produk H-beam. Aktivitas pada aliran supply chain atau rantai pasok di PT Sentra Karya Mandiri tidak terlepas dari kemunculan risiko. Adanya hambatan atau risiko di sepanjang aliran rantai pasok ini dapat menyebabkan gangguan pasokan sampai konsumen akhir, sehingga manajemen risiko rantai pasok diperlukan untuk mengetahui aksi mitigasi penanganan risiko-risiko yang terjadi sepanjang aktivitas rantai pasok. Tujuan penelitian ini adalah mengidentifikasi kejadian risiko (risk event) dan sumber risiko (risk agent), serta merancang dan mengusulkan strategi mitigasi risiko untuk mengatasi sumber risiko pada rantai pasok produk H-beam. Metode yang digunakan dalam penelitian ini adalah pendekatan Supply Chain Operation Reference (SCOR) dalam pemetaan aktivitas rantai pasok dan metode House of Risk (HOR) untuk menentukan usulan strategi mitigasi yang dapat diterapkan untuk menangani dan memitigasi sumber risiko pada rantai pasok pembuatan H-beam. Terdapat 4 tahap yang dilakukan dalam penelitian ini, yaitu tahap identifikasi risiko, tahap analisa risiko, dan tahap evaluasi risiko yang termasuk dalam House of Risk tahap 1, serta tahap mitigasi risiko termasuk dalam House of Risk tahap 2. Berdasarkan metode House of Risk, diperoleh 33 kejadian risiko (risk event) dan 27 sumber risiko (risk agent) dengan 2 sumber risiko prioritas primer, 8 sumber risiko prioritas sekunder, dan 17 sumber risiko non prioritas, serta 14 usulan aksi mitigasi untuk menangani sumber risiko prioritas.
Identification and strategy for the risk mitigation of supply chain with Fuzzy House of Risk: A case study in pallet products Ulfah, Maria; Bahauddin, Achmad; Trenggonowati, Dyah Lintang; Ekawati, Ratna; Arina, Faula; Sonda, Atia; Ridwan, Asep; Ferdinant, Putro Ferro
Journal Industrial Servicess Vol 9, No 1 (2023): April 2023
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/jiss.v9i1.18953

Abstract

X Corp. is a manufacturing company that produces various wood packaging products, including pallets, which are in high demand, particularly for export commodities. However, the company's supply chain activities are often affected by various risks. If these risks are not addressed in a timely manner, they could disrupt the supply chain and lead to negative consequences for the company. Therefore, the company management needs to implement supply chain risk management to identify and mitigate these risks. This study aims to identify the risks that have occurred or are likely to occur in the supply chain of X Corp. and determine which risks should be prioritized for mitigation. The fuzzy house of risk method was used to analyze the data. The results of the study identified 38 risk events and 22 risk agents. Additionally, 17 proactive actions were proposed to the company to address the priority risk agents and mitigate their potential impact.
A regression-based model of MSME strategy effectiveness during and beyond the COVID-19 crisis Trenggonowati, Dyah Lintang; Katili, Putiri Bhuana; Singgih, Moses Laksono; Ridwan, Asep
Journal Industrial Servicess Vol 11, No 1 (2025): April 2025
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/jiss.v11i1.29644

Abstract

The COVID-19 pandemic has triggered a profound global economic crisis, disproportionately affecting Micro, Small, and Medium-Sized Enterprises (MSMEs) in developing countries such as Indonesia. Unlike previous economic shocks—such as the 1998 Asian Financial Crisis and the 2008 Global Recession—where MSMEs served as economic buffers, the pandemic exposed structural vulnerabilities in digital readiness, innovation capacity, and operational resilience. This study aims to empirically model the effectiveness of MSMEs’ strategic responses during crisis conditions using a multiple linear regression framework. Data were collected from 300 MSMEs across Indonesia through structured questionnaires, followed by classical assumption testing and regression analysis. The model includes six strategic variables: production activities, innovation, rebate strategies, business planning, e-commerce utilization, and product reliability. The results indicate that innovation, e-commerce, and product reliability significantly contribute to MSME effectiveness during disruption. The adjusted  value of 0.147 suggests moderate explanatory power, with potential for future research to examine broader environmental and policy-related variables. This study extends the existing literature by quantitatively identifying key strategic factors that foster MSME resilience—offering not only pandemic-era insights but also long-term guidance for post-crisis adaptation and preparedness. The findings provide a foundation for evidence-based policymaking aimed at enhancing MSME agility, sustainability, and crisis resistance in both current and future contexts.
Co-Authors Achmad Bahauddin Achmad Bahaudin Ade Irman Ade Irman Ade Irman Saeful Mutaqin Adelia Adelia Ahmad Aji Abadi Ani Umyati Ani Umyati Anting Wulandari Apriansyah Nuroni Arina, Faula Arta Rusidarma Putra Atia Sonda Atia Sonda Bima Rofi Bobby Kurniawan Chyntia Devi Octaviany Dhimas Satria Dyah L. Trenggonowati Dyah Lintang Trenggonowati Elisabet Sinurat Erni Krisnaningsih Fatah Sulaiman Ferdinant, Putro Ferro Gunawan, Akbar Imam Ribowo Sakti Imron Rosyadi Intan Emeralda Katili, Putiri Bhuana kulsum kulsum Kulsum Kulsum Kulsum Kulsum M.Wildan Alief Maria Ulfah Maria Ulfah Moh. Sofyan Budiarto Muhammad Adha Ilhami Muhammad NR Priantama Niken Ayu Savitri Nur Laelasari Nuraida Wahyuni Putro Ferro Ferdinant Putro Ferro Ferdinant Putro Ferro Ferdinant Rachmat Tamam Rasie Arthafia Ratna Ekawati Reno Aldiandru Ria Sudiana, Ria Saleh Dwiyatno Santoso, Muhammad Iman Silfiana Silfiana Singgih, Moses Laksono Sirajuddin Sirajuddin Siti Murni Sonda, Atia Supriyanto Supriyanto Supriyanto Supriyanto Trenggonowati, Dyah Lintang Trenggonowati, Dyah Lintang Triwin R. Ambarwaty ulfah, Maria Ulfah, Maria Vicky Arya Vivit Parida Yan Ferdian Yuyun Wulandari