1,720,968 research outputs found
Integrated FMEA-MCDM Untuk Penentuan Prioritas Gangguan Operasional Pada Proses Produksi
Full text linkGangguan selalu terjadi dalam proses produksi dan juga menyebabkan penurunan produktivitas. Apabila terdapat beberapa jenis gangguan yang terjadi, maka pembuat keputusan perlu memprioritaskan gangguan secara tepat karena terdapat risiko sebagai konsekuensi ketika prioritas yang dibuat salah. FMEA adalah salah satu metode yang sering digunakan untuk evaluasi dan penentuan prioritas, terutama kegagalan sebagai satu jenis gangguan untuk meminimalkan risiko yang dapat diadopsi untuk menilai dan mengevaluasi gangguan. FMEA memiliki beberapa kekurangan termasuk tidak mempertimbangkan bobot tingkat kepentingan tiap faktor, tidak mempertimbangkan uncertain information dari ahli, tidak mempertimbangkan biaya sebagai salah satu faktor, Oleh karena itu, penelitian ini bertujuan untuk melakukan modifikasi model FMEA untuk memprioritaskan gangguan dalam proses produksi. Dalam mencapai tujuan ini, beberapa metode diintegrasikan termasuk Analytical Hierarchy Process (AHP) yang bertujuan untuk menentukan bobot kepentingan tiap elemen RPN. Selain itu, penelitian ini menggunakan Technique for Order Preference by Similarity to an Ideal Solution untuk memprioritaskan gangguan. Rough set juga digunakan sebagai metode untuk mengaggregasi pendapat para ahli, dan juga digunakan untuk mengakomodasi uncertain information. Model ini juga mempertimbangkan loss revenue sebagai aspek untuk mengukur tingkat keparahan gangguan dalam menentukan prioritas. Hasil studi kasus menujukan bahwa terdapat perubahan 5 prioritas gangguan teratas apabila penentuan keputusan mempertimbangkan bobot tingkat kepentingan tiap RPN dan uncertain information
REDUCTION OF SETUP TIME IN THE DISASSEMBLY PROCESS WITH A SINGLE MINUTE EXCHANGE OF DIES (SMED) APPROACH AND FUZZY FAILURE MODE AND EFFECT ANALYSIS (FMEA)
Full text linkPT XYZ, a company specializing in heavy equipment component remanufacture, is committed to ensuring that its processes run quickly and efficiently. However, from 2022 to 2023, the disassembly engine process exceeded the average processing time. Observations revealed that 24% of the time was categorized as waste setup time, necessitating a more objective reduction. This research aims to determine the actual total setup time, internal and external activities, and time reduction using the SMED and Fuzzy FMEA methods. The disassembly process includes the main disassembly, sub disassembly 1, and sub disassembly 2. Single Minute Exchange of Dies (SMED) is employed to identify and reduce setup time by distinguishing between internal and external activities. Additionally, this research integrates the SMED method with Fuzzy Failure Mode and Effect Analysis (FMEA) to identify potential risks in setup activities and determine which internal activities can be modified. Changes to external activities will be analyzed using the 5-Why's method to identify root causes and find solutions. Observations revealed that the average disassembly engine setup time was 20 hours and 12 minutes, consisting of 25 internal activities and 56 external activities. The SMED method resulted in an 18% reduction in setup time, and when combined with the Fuzzy FMEA method, the reduction reached 59%, equivalent to 8 hours and 17 minutes
Analisis Beban dan Produktivitas Kerja Pemindahan Manual serta Semi-Manual Air Galon
Full text linkPada dasarnya ¾ waktu manusia dalam 1 hari adalah melakukan aktivitas (bekerja). Pekerjaan digolongkan menjadi 3 yaitu ringan, sedang, bahkan berat. Setiap kategori suatu pekerjaan diukur dari kemampuan fisik dalam melakukan suatu pekerjaan tertentu. Pemindahan material secara manual sering ditemui dan dilakukan dalam aktivitas sehari-hari, salah satunya adalah pengangkutan air galon dari suatu tempat ke ketempat lainnya. Penelitian terdahulu menggolongkan pemindahan air galon sebagai pekerjaan ringan. Walaupun demikian, menurutnya apabila dilakukan dengan posisi yang salah dapat menyebabkan cidera pada tulang belakang. Pengangkutan air galon juga dapat dilakukan dengan menggunakan troli, namun penggunaan alat bantu ini dapat memperlambat kerja (menurunkan produktivitas) karena troli tidak leluasa dikendalikan. Oleh karena itu tujuan penelitian ini yaitu mengkaji lebih lanjut beban kerja dengan perhitungan Recommended Weight Limit (RWL) dan produktivitas pada permasalahan pengangkutan air galon dengan beberapa skenario pemindahan. Hasil penelitian menunjukkan bahwa penggunaan troli sebagai alat angkut dalam proses handling air galon dapat memberikan efisiensi kebutuhan energi bagi operator. Handling yang dilakukan secara vertikal membutuhkan energi lebih tinggi yaitu sebanding dengan jumlah energi yang dikonsumsi untuk handling sebanyak 1 kali secara horizontal. Walaupun penggunaan alat angkut dapat secara efektif meningkatkan produktivitas, namun hal ini akan tercapai apabila jumlah angkut lebih dari 1 unit
MEMBUDAYAKAN PRINSIP 5S DI ARSYIFA BAKERY
Full text linkMeski memiliki potensi skala kecil, pemilik usaha, termasuk UMKM, harus memperhatikan lingkungan fisik kerja. Produktivitas karyawan akan dipengaruhi oleh tempat kerja yang rapi, nyaman, dan bersih. Keterbatasan ruang membutuhkan solusi yang tepat untuk mencegah lingkungan kerja yang kurang tertata, bersih, dan tidak nyaman. Budaya 5S (Seiri, Seiton, Seiso, Seiketsu, dan Shitsuke) dapat diterapkan di lingkungan produksi sebagai jawaban yang dapat dilakukan. Meskipun perusahaan besar telah sering menggunakan strategi ini, UMKM kecil seperti Arsyifa Bakery juga dapat mengadopsinya. Dengan permasalahan yang dihadapi Arsyifa Bakery antara lain keterbatasan ruang, pemahaman karyawan terhadap budaya 5S dan kebersihan ruang, maka bermaksud untuk menerapkan budaya 5S dengan harapan dapat meningkatkan kebersihan, ketertiban dan kedisiplinan baik barang maupun peralatan serta karyawan UMKM Arsyifa Bakery. Temuan kegiatan menunjukkan bahwa UMKM dapat memperoleh manfaat yang signifikan dari pendekatan 5S. Karyawan mempelajari peralatan dan item mana yang perlu dikategorikan serta bagaimana mengaturnya. Hal ini dibuktikan berdasarkan hasil evaluasi menggunakan 19 indikator yang mana 10 dari 19 indikator mengalami peningkatan penilaian. 9 indikator lainnya tidak memiliki perubahan penilaian dari sebelumnya mengingat indikaotr-indikator tersebut sudah baik pada kondisi sebelum penerapan
SISTEM KELISTRIKAN BERBASIS SOLAR PANEL UNTUK RUMAH NELAYAN TRADISIONAL
Full text linkLimitations and the absence of electricity will disrupt the continuity of people activities. This is because electricity is one of the needs of the people and is felt to be very important. The availability of electricity, which is supported by power plants sourced from fossil fuels, certainly burdens the lower middle class community, including the fishing community. The solution that can be implemented to reduce the burden and dependence of the community on fossil fuels as a source of electrical energy is the use of solar energy. Indonesia has good potential when using solar energy as an alternative energy for power generation. This is because Indonesia is a tropical country that has abundant solar energy potential. Thus, this abundant solar resource is expected to meet household-scale electricity needs in remote areas that have not been reached by the State Electricity Company (PLN). PLTS in this service is carried out to meet electricity needs independently in residential homes that will be used day and night. The type of residential house used is a simple house type, with a total daily electrical power requirement of 1.314Wh and added 20% so that the total need is 1,576.8 Wh
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Battery pack remanufacturing decisions considering remanufacturing costs and risk priority number in determining repair or replacement
No full textThe growth of electric vehicles is accompanied by an increase in the number of batteries and battery waste produced, which can ultimately have harmful effects on the environment. As a solution, battery pack remanufacturing has emerged as an effective alternative. However, challenges in the remanufacturing process include determining which battery pack components can be repaired and which require replacement with new components, ensuring that remanufacturing costs remain low while preventing potential future failures. This study aims to develop a remanufacturing decision model that integrates Failure Mode and Effect Analysis (FMEA) with a remanufacturing cost model. The study’s results outline the relationship between failure modes and battery pack components, whereby each failure mode can be classified to determine appropriate repair or replacement actions. While specific actions have been formulated, remanufacturing costs remain the final determinant in the overall battery remanufacturing decision. Based on the analysis, repairs or replacement of new part on 13 components associated with failure modes still render the battery pack suitable for remanufacturing, with a potential cost saving of more than 40% compared to purchasing a new battery pack
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