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Penentuan Interval Waktu Pemeliharaan Pencegahan pada Peralatan Sub-Unit RKC 3 di PTX Pabrik Tuban Kristianto, Fesa Putra; Soepangkat, Bobby O.P.
Jurnal Bisnis dan Keuangan Vol 2 No 2 (2017): October
Publisher : UNUSA Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33086/bfj.v2i2.468

PT X Tuban Plant has four plants (unit), namely Tuban I, Tuban II, Tuban III and Tuban IV. Each unit plant has three sub units, i.e., Crusher Operations Sub-Unit, Raw Mill, Kiln and Coal Mill (RKC) Sub-Unit and Finish Mill Sub-Unit. RKC 3 Sub-Unit in Tuban III has the highest number of equipment downtime and production loss. Therefore, it was necessary to optimize the time interval of preventive maintenance ( ) and total labor force as part of the company maintenance policy, would also fulfill the required reliability and availability of RKC 3 Sub-Unit. There were two steps in determining Tp optimum. The first step was to obtain the best distribution of the time between failures (TBF) and time to repair (TTR). The next step was to iterate the operating time (Ti) and Tp to determine the minimum preventive maintenance cost rate, reliability and maintainability.This iteration was applied to sub-units of RKC 3 that possesses a series system. Tp at the lowest rate of maintenance costs was the optimum Tp. The optimum Tp for RKC 3 Sub-Unit is 3743,28 hour. The preventive maintenance cost rate for optimum Tp is Rp33.100/hour and the reliability and availability of sub unit are 96,7% and 99,86% respectively.Keywords: reliability, availability, preventive maintenance cost rate, and preventive maintenance

ANALISIS PENGENDALIAN PERSEDIAAN BAHAN BAKU PT. X DENGAN MENGGUNAKAN METODE ECONOMIC ORDER QUANTITY (EOQ) Kristianto, Fesa Putra; Widianto, Wahyu; Pangestika, Erlina
Jurnal Penelitian dan Pengabdian Kepada Masyarakat UNSIQ Vol 8 No 2 (2021): Mei
Publisher : Lembaga Penelitian, Penerbitan dan Pengabdian Masyarakat (LP3M) UNSIQ

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32699/ppkm.v8i2.1705

PT. X adalah perusahaan furnitur yang berada di Semarang, Jawa Tengah. Bahan baku kayu yang digunakan PT. X dalam memproduksi furnitur adalah kayu sungkai. Kelebihan kayu sungkai adalah serat dan garis kayu yang bagus. Akan tetapi kayu sungkai mempunyai kelemahan yaitu tidak tahan air dan hama khususnya untuk kayu yang berbentuk papan. Sistem persediaan yang digunakan PT. X saat ini kurang optimal. Hal ini dikarenakan jumlah persediaan bahan baku PT. X sangat banyak sehingga mengeluarkan biaya penyimpanan dan pemesanan yang besar. Oleh karena itu mengendalikan persediaan bahan baku pada PT. X sangat diperlukan. Salah satu metode yang digunakan adalah Economic Order Quantity (EOQ) model Q. Dengan menggunakan EOQ model Q, PT. X dapat mengoptimalkan persediaan berdasarkan permintaan pasar. Hasil analisa perbandingan metode EOQ model Q dengan metode manajemen persediaan PT. X ditinjau dari total biaya tahunan yaitu untuk metode EOQ model Q sebesar Rp. 2.697 Juta sedangkan untuk metode manajemen persediaan PT. X sebesar Rp. 3.407 Juta. Hal ini menunjukkan bahwa dengan metode EOQ model Q perusahaan dapat menghemat biaya persediaan sebesar Rp. 709 Juta dan efisiensinya mencapai 20,82%.

Penentuan Interval Waktu Pemeliharaan Pencegahan pada Peralatan Sub-Unit RKC 3 di PTX Pabrik Tuban Fesa Putra Kristianto; Bobby O.P. Soepangkat
Jurnal Bisnis dan Keuangan Vol 2 No 2 (2017): Business and Finance Journal
Publisher : UNUSA Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33086/bfj.v2i2.468

PT X Tuban Plant has four plants (unit), namely Tuban I, Tuban II, Tuban III and Tuban IV. Each unit plant has three sub units, i.e., Crusher Operations Sub-Unit, Raw Mill, Kiln and Coal Mill (RKC) Sub-Unit and Finish Mill Sub-Unit. RKC 3 Sub-Unit in Tuban III has the highest number of equipment downtime and production loss. Therefore, it was necessary to optimize the time interval of preventive maintenance ( ) and total labor force as part of the company maintenance policy, would also fulfill the required reliability and availability of RKC 3 Sub-Unit. There were two steps in determining Tp optimum. The first step was to obtain the best distribution of the time between failures (TBF) and time to repair (TTR). The next step was to iterate the operating time (Ti) and Tp to determine the minimum preventive maintenance cost rate, reliability and maintainability.This iteration was applied to sub-units of RKC 3 that possesses a series system. Tp at the lowest rate of maintenance costs was the optimum Tp. The optimum Tp for RKC 3 Sub-Unit is 3743,28 hour. The preventive maintenance cost rate for optimum Tp is Rp33.100/hour and the reliability and availability of sub unit are 96,7% and 99,86% respectively.Keywords: reliability, availability, preventive maintenance cost rate, and preventive maintenance

Framework for Furniture and Wood Processing Industry Polytechnic in Era Disruption of Covid-19 Fesa Putra Kristianto; Nuthqy Fariz; Deni Saputra; Salwa Islami Athirah
INTERNATIONAL RESEARCH JOURNAL OF BUSINESS STUDIES Vol 14, No 2 (2021): August - November 2021
Publisher : Universitas Prasetiya Mulya

Show Abstract | Download Original | Original Source | Check in Google Scholar

In the era of the Covid-19 pandemic, all activities are forced to adapt to theDisruption Era, one of which is the education sector. The era of Disruption Covid-19 changed the learning system from face to face to online and did not change the quality of the learning process. Therefore, the Furniture and Wood Processing Industry Polytechnic must create a new framework in order to survive. This study aims to create a new framework that has the perspectives of various stakeholders such as government, industry, academic institutions, certification institutions, students and technological developments. The making of this framework is based on PEST analysis and a drives competitive for universities according to (Panday, 2014). The result of the framework for the Wood Furniture and Processing Industry Polytechnic are implementation health protocol for Covid-19, improvement of facilities dan infrastructure, creating income from teaching factory, SDM adaptation for improvement facilities and infrastructure, and quality assurance of graduates. The next step is to carry out monitoring and evaluation (MONEV) so that the implementation of framework runs according to the references and targets. https://doi.org/10.21632/irjbs.14.2.107-117

Yield and Extraction Rate Analysis of Phytochemical Compounds from Eucheuma cottonii, Ganoderma lucidum, and Gracilaria sp. using Subcritical Water Extraction Fesa Putra Kristanto; Siti Machmudah; Sugeng Winardi; Wahyudiono Wahyudiono; Motonobu Goto
ASEAN Journal of Chemical Engineering Vol 21, No 1 (2021)
Publisher : Department of Chemical Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ajche.60513

Eucheuma cottonii (E. cottonii), Ganoderma lucidum (G. lucidum), and Gracilaria sp. are plants that contain high phytochemicals, such as flavonoids, polyphenols, saponins, and tannins. In this work, the phytochemicals were obtained using the subcritical water extraction (SWE) process. The SWE method uses water as a solvent in subcritical conditions. Therefore, the SWE process is an environmentally friendly process for extraction. In order to run the SWE process optimally, measurement of the extraction rate of SWE is needed. Calculation of the extraction rate of SWE process used first and second-order models according to Lagergren equation. SWE process was started by setting temperatures from 140 to 180oC at a pressure of 7 MPa and solvent flow rate of 1 ml/min. Before starting the extraction, the raw material was loaded into the extractor. The raw materials used were E. cottonii, G. lucidum, and Gracilaria sp. The extraction process was carried out for 3 hours, and the product was collected every 30 minutes. The collected product was put into a sample bottle and dried using a freeze dryer. After that, the products obtained were balanced by an analytical scale. Based on the result, the optimum temperature for the SWE process was 180oC for E. cottonii and G. lucidum and 160oC for Gracilaria sp. The yields of the SWE process under the optimum temperature were 85.37%, 58.42%, and 75.73% for E. cottonii, G. lucidum, and Gracilaria sp, respectively. The extract contained phytochemical compounds detected by high-performance liquid chromatography analysis. The kinetics model of extraction rate for all variables exhibited a second-order kinetics model that indicated that the extraction process was influenced by more than one factor.

Multistage Sonication Effect on the Composition and Properties of Degraded Chitosan Product Arifin, Nurul Laili; Savitri, Emma; Indah, Anjar; Putra, Fesa; Sumarno, Sumarno
Makara Journal of Technology Vol. 23, No. 1
Publisher : UI Scholars Hub

Show Abstract | Download Original | Original Source | Check in Google Scholar

The sonication method randomly breaks polymer chains to produce a varied distribution of products. A scheme with multi-stage sonication steps is proposed to identify oligomers and low molecular weight chitosan based on changes to the degrad-ed product. For each sonication level, 1% (w/v) chitosan in 1% (v/v) aqueous acetic acid was sonicated for 120 min at 60 °C. The products of the sonication treatment were deprotonized by adding an alkali solution, freeze dried and insoluble product re-sonicated until a low molecular weight was produced. Low molecular weight chitosan/insoluble products were character-ized with Fourier-transform infrared spectra (FT-IR) and X-ray diffraction (XRD) to determine the effect of multistage soni-cation on degree of deacetylation (DD) and degree of crystallinity. The viscosity of the average molecular weight of insolu-ble chitosan was estimated by a viscometric method, while the degree of polymerization (DP) of the chitosan oligomers (COS) were determined by end group analysis. The results showed that the molecular weight of insoluble chitosan decreased and reached a limiting value, (Mlim). The percent yield of oligoglucosamine of the soluble products increased with the num-ber of the sonication stages. The degree of crystallinity of insoluble chitosan increased from 19% to 34.14% while the DD decreased from 82% to 78.1%.

Simulation of A Solar Drier for Iroko Wood (Chlorophora Excelsa) in A Tropical Environment Fesa Putra Kristianto; Mercusuar Kemall Gibran Salim
Eksergi Vol 20, No 1 (2023)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v20i1.8166

In a previous study conducted by Simo Tagne to designing a solar dryer based on mathematical equations for iroko wood in Cameroon, Africa. However, there is no complete simulation of the drying process on the tool, resulting in the lack of detailed elaboration of the iroko wood drying process. The purpose of this study is to simulate in detail the drying process on the tool using an ANSYS simulation. The model used in this simulation still uses the same mathematical model that has been studied before. This research begins by setting up the ANSYS application with the previous mathematical model, environmental conditions, and tool specifications. Furthermore, simulations are carried out using the ANSYS application with measurements of pressure, temperature, velocity and mass transfer. From this simulation obtained results for the distribution of pressure, temperature, velocity, and mass transfer. From all these distributions, it is sufficient to describe the drying process of the tool according to the mathematical model that has been studied previously.

DESIGN EMPLOYEE DATA MANAGEMENT INFORMATION SYSTEM AT PT. SEMERU KARYA BUANA Kristianto, Fesa Putra; Puspitaningsih, Fitri Indah; Salsabila, Sobrina Aisya
JURNAL ILMIAH TEKNOLOGI INDSUTRI (SAINTI) Vol 21, No 2 (2024): VOL 21 NO 2 DESEMBER 2024
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/sainti.v21i2.279

The rapid development of technology in the era of globalization has led to significant advancements, with information systems being one of the innovations that facilitate information management. PT. X, a manufacturing company in the furniture sector, faced specific challenges in managing personnel administration, such as data input errors and payroll delays due to the use of conventional methods like Microsoft Excel. This resulted in inefficiencies and errors that affected the company's operations. This research designed an employee data management information system at PT. X with the aim of creating an effective and efficient system to assist administrators in processing employee data. The Rapid Application Development (RAD) method was used in the development of this system. The resulting application can be used by the HR department as administrators and by employees as users. The implementation results show that the new system effectively addresses the existing issues, with significant improvements such as reducing data input errors and increasing the speed of payroll processing compared to the previous method. From the user questionnaire results, both system quality and interface design received positive feedback, and the information system can be successfully applied at PT. X.

Optimasi Pengembangan Ujian Online pada Penerimaan Mahasiwa Baru Politeknik Industri Furnitur dan Pengolahan Kayu dengan Analisis Kelayakan Ekonomi dan Teknologi Sabila, Maharsi Anis; Kristianto, Fesa Putra; Shoffiyati, Peni; Rosada, Magfur
Majalah Teknik Industri Vol 30 No 2 (2022): Majalah Teknik Industri Vol.30 No.2 Desember 2022
Publisher : Unit Penelitian dan Pengabdian Masyarakat (UPPM) Politeknik ATI Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61844/majalahteknikindustri.v30i2.374

Penerimaan mahasiswa baru di Politeknik Industri Furnitur dan Pengolahan Kayu (Polifurneka) memiliki dampak yang signifikan terhadap kualitas pendidikan, Salah satunya adalah tingkat kompetensi dari mahasiswa baru yang diterima. Oleh karena itu perlu dilakukan optimasi pengembagan sistem seleksi penerimaan mahasiswa baru menggunakan sistem ujian online CAT (Computer Asissted Test) untuk menghasilkan mahaiswa yang berkompeten. Terdapat tiga opsi sistem ujian online yang dapat di implementasikan di Polteknik Industri Furnitur dan Pengolahan Kayu yaitu sistem ujian online dengan membuat sendiri, sistem ujian online yang dihandel oleh vendor dan sistem ujian online dari upgrade premium google form. Oleh karena itu ketiga opsi ini harus dianalisis secara ekonomi dan teknologi. Analisis kelayakan ekonomi dan teknologi dapat membantu dalam menentukan opsi sistem ujian online yang memiliki nilai tambah untuk menggantikan metode penerimaan mahasiswa baru yang ada. Analisis kelayakan ekonomi akan mengevaluasi berapa banyak biaya yang terkait dengan penerimaan mahasiswa baru, termasuk biaya pembuatan, pemeliharaan dan pembaruan. Analisis kelayakan teknologi akan mengevaluasi kemampuan teknis yang diperlukan dalam sistem CAT untuk mengembangkan ujian online. Dengan demikian, analisis kelayakan ekonomi dan teknologi dapat menentukan opsi ujian online yang menjadi solusi yang efisien dan efektif untuk penerimaan mahasiswa baru di Polifurneka dan analisis kelayakan ini akan membantu dalam meningkatkan efisiensi karena mengurangi biaya penerimaan mahasiswa baru, mengetahui keefektifan teknologi yang dibutuhkan untuk mengembangkan ujian online agar dapat menghasilkan hasil yang berkualitas, dan juga apakah hasil ujian online dapat diandalkan untuk menggantikan metode penerimaan mahasiswa baru yang ada.

Training of Trainers 4.0 Industri Kecil Menengah Furnitur Untuk Mendorong Transformasi Digital Dengan Teknologi Internet of Things Kristianto, Fesa Putra; Broto, Taukhid Wisnu; Puspitaningsih, Fitri Indah
Journal of Industrial Community Empowerment Vol 3, No 2 (2024): Published in October 2024
Publisher : Politeknik ATI Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52759/jice.v3i2.293

The furniture industry in Central Java still faces various challenges, especially in adopting advanced technologies such as the Internet of Things and Industry 4.0. Many furniture SMEs still rely on manual or semi-manual production methods, which result in suboptimal product quality and production efficiency, making it difficult to compete in the global market. To address these challenges, the Community Service Program carried out by the Furniture Industry Business Management Study Program at Polytechnic of Furniture Industry and Wood Processing actively played a role through the Training of Trainers activity. This program aims to provide intensive training on the implementation of IoT and Industry 4.0 technologies to furniture SMEs in Central Java, focusing on developing practical skills and fostering digital transformation. Training of Trainers training involved Furniture Industry Business Management lecturers who possess specialized expertise in Industry 4.0 technologies. The training covered both theoretical and practical aspects, allowing participants to not only understand the concepts but also implement them in their work environments. Evaluation results showed a significant increase in the participants' understanding and skills in applying Industry 4.0 and Internet of Things technologies. A tangible example of the success of this training is PT. AST Indonesia, which successfully implemented Industry 4.0 and Internet of Things technologies in its production processes after participating in the Training of Trainers program. This success is concrete evidence that the training provided by Furniture Industry Business Management can contribute significantly to enhancing the competitiveness of furniture SMEs in the digital era, in line with the vision of "Making Indonesia 4.0.

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