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All Journal Jurnal Rekayasa Sistem Industri Jurnal Optimasi Sistem Industri Jurnal Ilmiah Teknik Industri INVOTEK: Jurnal Inovasi Vokasional dan Teknologi Jurnal Sistem Teknik Industri MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Jurnal Optimasi Teknik Industri (JOTI) Warta Pengabdian Andalas: Jurnal Ilmiah Pengembangan Dan Penerapan Ipteks
Eri Wirdianto
Universitas Andalas
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering Medicine & Pharmacology Social Sciences Transportation Other

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Evaluasi Model Perencanaan Persediaan Obat dengan Pendekatan Simulasi Eri Wirdianto; Meiyola Syaflinda; Milana Milana
invotek Vol 19 No 1 (2019): INVOTEK: Jurnal Inovasi, Vokasional, dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (386.738 KB) | DOI: 10.24036/invotek.v19i1.591

Abstract

Permasalahan yang dihadapi apotek saat ini yaitu masalah persediaan obat dimana terdapat beberapa obat yang tidak bisa memenuhi kebutuhan konsumen dan terkadang persediaan obat mengalami kelebihan stok. Penelitian ini bertujuan untuk menentukan metode terbaik dalam menentukan kuantitas persediaan obat dengan kriteria service level tertinggi dan total cost terendah. Pengklasifikasian obat berdasarkan analisis ABC. Obat yang dipilih hanya obat yang masuk ke dalam kategori A dan 10 jenis obat termahal. Setelah itu dilakukan perhitungan nilai persediaan dengan menggunakan tiga metode yaitu EOQ, Joint Replenishment, dan Sistem (Q,r). Evaluasi untuk ketiga metode tersebut menggunakan pendekatan simulasi. Model simulasi ini dibangun dengan cara memasukkan pola-pola permintaan untuk masing-masing obat serta memasukkan nilai persediaan untuk masing-masing metode yang telah dihitung sebelumnya. Dari hasil perhitungan dengan pendekatan simulasi untuk masing-masing metode didapatkan perbandingan nilai total cost dan service level. Nilai service level tertinggi dan total cost terendah untuk hasil perhitungan dan hasil simulasi memiliki hasil yang sama yaitu metode Joint Replenishment.
Model Penjadwalan Pemeliharaan Preventif Mesin-Mesin Produksi untuk Meminimasi Total Tardiness Eri Wirdianto; Irfan Nugraha Putra Mukhti; Alexie Herryandie Bronto Adi; Milana Milana
invotek Vol 20 No 1 (2020): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (859.957 KB) | DOI: 10.24036/invotek.v20i1.629

Abstract

Preventive maintenance is considered as a method to avoid unexpected failure in production machines. Unfortunately, conducting such maintenance is limited by resources availability thus likely causes tardiness. This research aims to minimize total tardiness of preventive maintenance on production machines by developing a scheduling model. This scheduling model takes the availability of time and labor into account to get an optimal scheduling model that can minimize the tardiness. The model of preventive maintenance schedule is developed by using the Integer Linear Programming method. This method provides output in the form of preventive maintenance schedule through a purpose function which considers the specified constraints on the company. As the result, the developed model could propose a preventive maintenance schedule which reduces the total tardiness.
Performance measurement using balance scorecard leading to strategy formulation: A case study in water company Milana Milana; Eri Wirdianto; Alexie Herryandie Bronto Adi
invotek Vol 21 No 3 (2021): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v21i3.929

Abstract

Organization goals could be achieved by translating vision and mission into strategy. The strategy should be carefully formulated to direct the operation plans to work in harmony to achieve the goal. This research aims to show how the strategy is formulated based on the performance measurement result. The performance indicators are generated using the Balanced Scorecard approach with its four perspectives; financial, customer, internal business process, and learning and growth. Once these indicators and their benchmarks are defined, performance measurement is carried out. The performance measurement result is then input into a Strength-Weakness-Opportunity-Threat (SWOT) matrix. This approach proved that it could help the company review its existing strategy achievements and competitive position. Furthermore, the SWOT analysis proposes some potential actions taken by the company, which fall on Offensive, Defensive, Adjust, and Survive strategies.
Aplikasi Algoritma Hybrid dalam Penentuan Rute Pendistribusian Produk (Studi Kasus: PT. Enseval Putera Megatrading) Eri Wirdianto; Dhina Regenie; Wisnel Wisnel
Jurnal Optimasi Sistem Industri Vol. 15 No. 2 (2016): Published in November 2016
Publisher : The Industrial Engineering Department of Engineering Faculty at Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (440.442 KB) | DOI: 10.25077/josi.v15.n2.p171-180.2016

Abstract

PT. Enseval Putera Megatrading is a company which operates in general business and distribution of pharmacy products, general needs, cosmetics, foods and hospital equipment. In their current practice, routing in products deliveries, which is limited by time windows, has not considered the utilization of vehicles' maximum loading capacities. Distribution route from a hybrid algorithm using heuristic clustering and Mixed-Integer Linear Programming approach can accommodate such problem with time windows and vehicles' capacities utilization. Based on the comparison between company’s current route and the route from the hybrid algorithm, it can be seen that the hybrid algorithm is able to decrease total distance and total cost of transportation. This new route concerns on vehicles allocation and time windows limit. This new route can minimize the total cost of transportation that company has to pay.
Factors Affecting Customer Satisfaction In E-Commerce Dina Rahmayanti; Eri Wirdianto; Ikhwan Arief; Arri Fatimah Zahra; Hafizh Ahmad
Jurnal Ilmiah Teknik Industri Vol. 20, No. 2, December 2021
Publisher : Department of Industrial Engineering Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/jiti.v20i2.15635

Abstract

This research aims to identify the influence of website quality, product quality, product price, and safety shopping on e-commerce customer satisfaction and determine the significant factor influencing e-commerce customer satisfaction. The method used in this research is multiple linear regression analysis to identify the relationship between independent variables and dependent variables. This research uses the purposive sampling technique to determine the sample size through an online questionnaire to obtain the primary data. The 184 respondents respond to the online questionnaire through social media. This research shows that website quality, product quality, product price, and safety shopping simultaneously influence customer satisfaction. Furthermore, the most significant factor affecting customer satisfaction is product quality; this factor contributes as much as 38% among the other three independent variables in this research.
Pelatihan Standar Penanganan Pangan Rendang di Sentra Produksi Randang Reinny Patrisina; Prima Fithri; Lusi Susanti; Hilma Raimona Zadry; Difana Meilani; Eri Wirdianto; Jonrinaldi Jonrinaldi; Desto Jumeno; Asmuliardi Muluk; Alexie Herryandie; Feri Afrinaldi; Henmaidi Henmaidi; Alfadhlani Alfadhlani; Insannul Kamil; Dicky Fatrias; Taufik Taufik; Wisnel Wisnel; Alizar Hasan; Rika Ampuh Hadiguna; Ahmad Syafruddin; Nilda Tri Putri; Elita Amrina; Ikhwan Arief; Afri Adnan
Warta Pengabdian Andalas Vol 26 No 2 (2019)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat (LPPM) Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jwa.26.2.112-116.2019

Abstract

Nowadays, consumers are getting smarter in choosing products, including food products. Food safety is an important thing that must be considered by the food industry. Unsafe food production can only be done because of food, product needs, lengthy legal process, but can also damage the community. Customer needs demand certainty from the food provided in a way that meets food safety standards, from the garden to the table. To fulfill this reason, all parties involved in the food production process must know and understand well matters related to food procurement standards for the products produced. Rendang is one of the traditional foods of West Sumatra that has begun worldwide. This requires the need to produce rendang with food safety standards is very important. Based on this, within the framework of the Community Service Department of Industrial Engineering UNAND conducts training / technical guidance related to the rendang food procurement standards with training on Good Manufacturing Practices (GMP). This activity was expected to help Small and Medium Enterprises to get business standardization.
Analysis of the Effect of E-Service Quality on E-Commerce Customer Satisfaction and Loyalty Wisnel Wisnel; Eri Wirdianto; Tara Cantika
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 4 No 3 (2022): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (523.153 KB) | DOI: 10.46574/motivection.v4i3.145

Abstract

Service quality is a determining factor for the success of an e-commerce business serving its customers, which has an impact on customer satisfaction and loyalty. Therefore, this study aims to measure the service quality of several online e-commerce market-places on customer satisfaction and loyalty in Indonesia. This study focuses on the four most visited e-commerce application providers, namely Lazada, Tokopedia, Bukalapak, and Shopee. The concept of e-servqual and the SEM-PLS analysis method are used in this study. The results show that the variables that have significant effect on customer satisfaction are responsiveness, personalization, and reliability. While the variables that have no significant effect are website usability, information quality, and assurance. Furthermore, the variables that affect customer loyalty and satisfaction are assurance and website usability. Meanwhile, the variables of reliability, information quality, personalization, and responsiveness have no significant effect on customer loyalty. Kualitas layanan merupakan faktor penentu kesuksesan suatu usaha e-commerce melayani konsumennya yang berdampak pada kepuasan dan loyalitas pelanggan. Oleh karena itu, penelitian ditujukan untuk mengukur kualitas layanan beberapa e-commerce market-place daring terhadap kepuasan dan loyalitas pelanggannya di Indonesia. Penelitian ini fokus pada empat penyedia aplikasi e-commerce yang paling banyak dikunjungi yaitu Lazada, Tokopedia, Bukalapak, dan Shopee. Konsep e-servqual dan metode analisis SEM-PLS digunakan dalam penelitian ini. Hasil penelitian menunjukkan bahwa variabel yang berpengaruh nyata terhadap kepuasan pelanggan adalah daya tanggap, personalisasi dan keandalan. Sedangkan variabel yang tidak berpengaruh nyata adalah kegunaan website, kualitas informasi, dan jaminan. Selanjutnya, variabel yang mempengaruhi loyalitas dan kepuasan pelanggan adalah jaminan (assurance), dan kegunaan website (website usability). Sementara itu, variabel keandalan (reliability), kualitas informasi (information quality), personalisasi (personalization), dan daya tanggap (responsiveness) tidak berpengaruh nyata pada loyalitas pelanggan.
Site Selection for the Citronella Oil Distillation Unit at Rambatan Subdistrict Tanah Datar Regency Alexie Herryandie Bronto Adi; Eri Wirdianto; Felia Devina Amadea; Desto Jumeno; Reinny Patrisina
MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Vol 5 No 2 (2023): Motivection : Journal of Mechanical, Electrical and Industrial Engineering
Publisher : Indonesian Mechanical Electrical and Industrial Research Society (IMEIRS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (457.621 KB) | DOI: 10.46574/motivection.v5i2.227

Abstract

The Sarasah Village Cooperative (KUD Sarasah) located in Nagari III Koto, Rambatan Subdistrict, Tanah Datar Regency plans to build a citronella oil distillation unit. The decision about the location where to build a factory is a strategic decision that needs to be considered carefully, because it involves a large amount of investment and has a long-term impact. This study aims to select the location of the construction of citronella oil distillery. The method used in this research is the Analytical Hierarchy Process. The conclusion that can be drawn regarding the most strategic location for the construction of a citronella oil production house is Aur Serumpun with a weight of 47.9% whereas the Long-Term aspect is the most influential criterion with a weight of 43.4%. KUD Sarasah yang berlokasi di Nagari III Koto, Kecamatan Rambatan, Kabupaten Tanah Datar berencana membangun rumah produksi penyulingan minyak serai wangi. Keputusan tentang lokasi tempat pendirian pabrik merupakan keputusan strategis yang perlu dipertimbangkan secara cermat, karena menyangkut investasi dalam jumlah besar dan memiliki dampak jangka panjang. Penelitian ini bertujuan untuk memilih lokasi pembangunan rumah produksi minyak serai wangi. Metode yang digunakan di dalam penelitian ini adalah Analytical Hierarchy Process. Kesimpulan yang dapat diambil terkait lokasi yang paling strategis sebagai tempat pembangunan rumah produksi minyak serai wangi adalah di Aur Serumpun dengan bobot sebesar 47,9% dimana aspek Jangka Panjang adalah kriteria yang paling mempengaruhi keputusan penentuan lokasi dengan bobot 43,4%.
Penentuan Rute Distribusi Tabung Oksigen dengan Menggunakan Metode Tabu Search Sakilah, Tiva; Febrian, Muhammad Naufal; Wirdianto, Eri
Jurnal Optimasi Teknik Industri (JOTI) Vol 6, No 2 (2024)
Publisher : Teknik Industri Universitas Indraprasta PGRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30998/joti.v6i2.24394

Abstract

Distribusi adalah kunci untuk memperlancar dan mempermudah penyampaian barang ke pelanggan. Klasifikasi, kuantitas kendaraan, dan rute atau jalur penyaluran harus diperhitungkan agar distribusi optimal. PT Gresik Cipta Sejahtera saat ini menghadapi masalah ketidaksesuaian antara jumlah produk yang dimuat dan daya tampung truk dalam penyaluran tabung oksigen, sehingga berdampak pada rute kendaraan yang tidak optimal. Masalah ini termasuk dalam Capacitated Vehicle Routing Problem (CVRP) karena masing-masing jenis kendaraan mempunyai perbedaan dalam hal kapasitas angkut. CVRP adalah suatu permasalahan penetapan jalur kendaraan untuk melayani konsumen dengan permintaan tertentu, menyambungkan depot dengan konsumen, serta antar konsumen, dengan memperhitungkan daya angkut maksimal kendaraan. Solusi yang digunakan menyelesaikan CVRP salah satunya adalah memanfaatkan algoritma Clarke and Wright Savings. Penelitian ini memiliki tujuan untuk menghasilkan rute distribusi tabung oksigen yang optimal. Pendekatan yang digunakan yaitu tabu search untuk mendapatkan solusi yang lebih baik. Penelitian ini mendapatkan hasil bahwa total jarak tempuh dengan metode tabu search adalah sebesar 275,35 km, dibandingkan hasil yang diberikan oleh algoritma Clarke and Wright Savings sebesar 290,05 km. 
VRPTW Distribution Route Determination with Rigid and Flexible Time Window and Assignment Based on Number of Demand Keynobi, Fikri; Wirdianto, Eri; Zidanne, Muhammad
Jurnal Sistem Teknik Industri Vol. 27 No. 1 (2025): JSTI Volume 27 Number 1 January 2025
Publisher : TALENTA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jsti.v27i1.17230

Abstract

Vehicle routing problems (VRP) are common in many companies and play an important role in distribution and logistics. Effective routing can significantly reduce expenses and increase customer satisfaction. The research entitled "Determining VRPTW Distribution Routes with Rigid and Flexible Time Windows and Assigning Based on the Demand Numbers" will solve the modified vehicle routing problem with time window (VRPTW) problem by considering constraints on vehicle capacity, delay times, penalty fees for delays, rigid and flexible time windows, and demand numbers. There is one origin depot for the company that will serve their 15 customers. The method used to overcome the problem is mixed-integer linear programming (MILP). In general, this research classifies time windows into three groups, namely rigid, flexible, and rigid and flexible. The time window model chosen is a rigid time window with a cost of IDR 561,965 and no customers are served late. The rigid time window model was chosen because no customers are served late and the cost difference is not significant or can be said to be very small compared to other time window models.
Co-Authors Adi, Alexie Herryandie Bronto Afri Adnan Afrinaldi, Feri Ahmad Syafruddin Alexie Herryandie Alfadhlani Alizar Hasan Arri Fatimah Zahra Asmuliardi Muluk Dalnis, Intan Permata Desto Jumeno Desto Jumeno Dhina Regenie Dhina Regenie Dicky Fatrias Difana Meilani Dina Rahmayanti Elita Amrina Ericho Chandra Arnes Febrian, Muhammad Naufal Felia Devina Amadea Hafizh Ahmad Henmaidi Henmaidi Hilma Raimona Zadry Ikhwan Arief Irfan Nugraha Putra Mukhti Jonrinaldi Kamil, Insannul Keynobi, Fikri Lusi Susanti Meiyola Syaflinda Milana Milana Nilda Tri Putri Prima Fithri Putri Oktaviani reinny patrisina Rika Ampuh Hadiguna Sakilah, Tiva Tara Cantika Taufik Taufik Wisnel Wisnel Zidanne, Muhammad