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All Journal Saintek Perikanan : Indonesian Journal of Fisheries Science and Technology J@TI (TEKNIK INDUSTRI) Industrial Engineering Online Journal Sainteknol : Jurnal Sains dan Teknologi Proceeding SENDI_U Jurnal Sistem dan Manajemen Industri Jurnal Manajemen Indonesia PERFORMA : Media Ilmiah Teknik Industri Journal of Education Technology International Journal of Supply Chain Management Khatulistiwa: Journal of Islamic Studies Media Bina Ilmiah Journal of Psychology and Social Sciences Al-Muhasib: Journal of Islamic Accounting and Finance International Economic and Finance Review LogicLink: Journal of Artificial Intelligence and Multimedia in Informatics Proceeding International Conference Of Innovation Science, Technology, Education, Children And Health

M. Mujiya Ulkhaq

Department Of Industrial Engineering, Diponegoro University, Jl. Prof. Sudarto, SH, Tembalang, Semarang, Indonesia 50275

Author-ID : 593370

Religion Humanities Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Medicine & Pharmacology Neuroscience Public Health Social Sciences Transportation Other

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APLIKASI METODE SEVEN TOOLS DAN ANALISIS 5W+1H UNTUK MENGURANGI PRODUK CACAT PADA PT. BERLINA, TBK. Dyah Rachmawati Rasyida; Muhammad Mujiya Ulkhaq
Industrial Engineering Online Journal Vol 5, No 4 (2016): Wisuda Oktober Tahun 2016
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Diponegoro

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PT. Berlina, Tbk adalah salah satu perusahaan pembuat kemasan plastik terbesar di Indonesia. Persaingan antara perusahaan memaksa manajemen PT. Berlina, Tbk untuk membuat konsep rencana dan menggunakan metodepengendalian kualitas yang tepat untuk menghadapinya. Penelitian ini dilakukan pada proses produksi pembuatan Gallon AQUA. Persentase cacat tertinggi yang didapat pada produksi Gallon AQUA yang terjadi di PT. Berlina, Tbk adapada bulan Agustus 2015, yaitu sebesar 15,85%. Hal ini merupakan salah satu penyebab kurangnya kualitas dan keuntungan PT. Berlina, Tbk. Tujuan dari penelitian ini adalah untuk meminimalkan cacat menggunakan metode Seven Tools.Seven tools merupakan metode yang berkesinambungan dari mulai check sheet, stratifikasi, diagram pareto, histogram diagram, diagram pencar, peta kendali dan diagram tulang ikan. Berdasarkan pengolahan data menggunakan Seven Tools ini didapat 6 jenis cacat. Cacat yang paling dominan dalam produk Gallon AQUA adalah cacat bintik hitam. Metode yang digunakan untuk menganalisis diagram tulang ikan dan memberikan rekomendasi untuk perbaikan ini adalah metode 5H + 1H. ABSTRACTApplication of Seven Tools Method and 5W1H Analysis of Quality Control to Reduce Product Defect in PT. Berlina, Tbk. PT. Berlina, Tbk is one of the biggest plastic packaging companies in Indonesia. The competition among companies forced the management of PT. Berlina, Tbk to make a concept plan and use appropriate selection of quality tools to deal with it.This research was conducted on the process of making the Gallon AQUA. Percentage of defects happened at PT. Berlina, Tbk, which production in August 2015 for Gallon AQUA obtained the highest disability percentage of 15.85%. It is one of the causes of the lack of quality and decrease the profit of PT. Berlina, Tbk. The purpose of this research is to minimize the defect based on the analysis using Seven Tools method. Seven Tools are doing a continuous way starting from the check sheets, stratification, pareto diagram, histogram diagram, scatter diagrams, control chart and fishbone diagram. Based on the data processing using Seven Tools there are 6 types of defect. The most dominant defect in Gallon AQUA product is black dot defect. The method that could be used to analyze the fishbone diagram and give recommendation for improvement is 5H+1H method.

PENILAIAN RISIKO KESELAMATAN KERJA PADA PROSES PEMBUATAN BALOK JEMBATAN DENGAN METODE JOB SAFETY ANALYSIS (JSA) Della Mustika Putri; Muhammad Mujiya Ulkhaq
Industrial Engineering Online Journal Vol 6, No 4 (2017): wisuda periode oktober 2017
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Diponegoro

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[Penilaian Risiko Keselamatan Kerja Pada Proses Pembuatan Balok Jembatan dengan Metode Job Safety Analysis (JSA)] Sebagai negara berkembang, Indonesia adalah salah satu tempat yang strategis untuk berinvestasi. Namun, sebelum berinvestasi tentunya terdapat beberapa pertimbangan yang dilakukan oleh investor. Salah satunya adalah sarana dan infrastruktur yang baik. PT Wijaya Karya Beton adalah salah satu badan usaha millik negara (BUMN) yang bergerak di bidang industri beton pracetak, seperti tiang pancang, tiang listrik, balok jembatan, bantalan jalan rel, dan lain-lain. Perusahaan ini sudah menggunakan mesin dan peralatan yang modern sehingga dibutuhkan sumber daya manusia yang professional dan berpengalaman dalam mengoperasikan mesin-mesin tersebut. Oleh karena itu, keselamatan kerja merupakan hal yang harus diperhatikan oleh semua pihak yang berada di lingkungan pabrik. Kecelakaan kerja merupakan hal yang tidak dapat diprediksi namun dapat dilakukan tindakan preventif dalam mencegah terjadinya kecelakaan kerja. Di perusahaan ini pernah terjadi kecelakaan kerja, baik kategori ringan dan sedang. Pada Tahun 2015 tercatat sebanyak 31 kecelakaan. Kecelakaan tersebut berupa terkena atau tergores, tertimpa, dan terjepit alat/benda kerja, tersengat aliran listrik tegangan tinggi, terpeleset saat melakukan aktivitas kerja, pingsan, terkena serpihan las, dan terperosok saluran air. Untuk menghindari hal tersebut terulang kembali maka diperlukan identifikasi potensi timbulnya kecelakaan kerja, salah satunya dengan metode JSA. Keuntungan menerapkan JSA adalah memberikan rekomendasi metode kerja terbaik sehingga keamanan, kesehatan, dan keselamatan pekerja terjamin. Abstract [Assessment of Work Safety Risk in the Process of Making Bridge Beam Using Job Safety Analysis Method] As a developing country, Indonesia is one of the strategic places to invest. However, before investing, of course, there are several considerations made by investors. One of them is good facilities and infrastructure. PT Wijaya Karya Beton is one of Badan Usaha Milik Negara (BUMN) engaged in precast concrete industry, such as piles, power poles, bridge beams, railway bearings, and others. The company is already using modern machinery and equipment so that it takes a professional human resources and experienced in operating the machines. Therefore, work safety is a matter that must be considered by all parties who are in the factory environment. Work accidents are unpredictable but preventive measures can be taken in preventing workplace accidents. In this company had happened work accident, both light and medium category. In 2015, it is recorded 31 accidents. Such accidents are exposed or scratched, crushed, and pinched with tools/ workpieces, stung by high voltage, slip during work, fainting, exposure to welds, and mudslides. To avoid this happening again it is necessary to identify the potential for the occurrence of work accident, one of them with JSA method. The advantage of implementing JSA is to recommend the best working methods so that the security, health, and safety of workers is guaranteed.

MENGGUNAKAN METODE SIX SIGMA (STUDI PADA PLANT 4 REFINERY PT WILMAR NABATI INDONESIA) Elsa Idolla Ginting; Muhammad Mujiya Ulkhaq
Industrial Engineering Online Journal Vol 7, No 1 (2018): WISUDA PERIODE JANUARI 2018
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Diponegoro

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Salah satu perusahaan yang memproduksi minyak kelapa sawit di Indonesia adalah PT. Wilmar Nabati Indonesia. Plant 4 PT. Wilmar Nabati Indonesia memproduksi RBDPO sebesar 1600 MT/Hari. Unit refinery mengolah minyak CPO (Crude Palm Oil ) dan CPKO (Crude Palm Karnel Oil) menjadi minyak RBDPO (Refinery Bleaching Deodorizing Palm Oil) dan RBDPKO (Refinery Bleaching Deodorizing Palm Karnel Oil). Minyak yang tidak sesuai spesifikasi diproses kembali sehingga menyebabkan target produksi tidak tercapai. Banyaknya produk defect dapat meningkatkan biaya dan waktu produksi yang lebih besar. Dengan demikian perlu dilakukan perbaikan kualitas agar dapat meminimasi produk defect. Pengendalian kualitas dilakukan dengan memakai metode Six Sigma yang bertujuan untuk meminimasi cacat dan digunakan sebagai tolak ukur pengendalian kualitas. Hasil nilai sigma yang diperoleh pada perhitungan plant 4 berada diantara nilai 3 sampai 4 pada periode Oktober 2015 - Januari 2016. Nilai sigma tersebut menyatakan bahwa perusahaan berada pada kondisi rata-rata perusahaan. Dengan diterapkannya metode six sigma ini diharapkan pengendalian kualitas pada perusahaan tersebut dapat menjadi lebih baik dan target 3,4 DPMO dapat tercapai. ABSTRACT[PRODUCTION QUALITY CONTROL ANALYSIS USING SIX SIGMA METHOD]. One of the companies that produce palm oil in Indonesia is PT. Wilmar Nabati Indonesia. Plant 4 PT. Wilmar Nabati Indonesia produce 1600 MT / Day RBDPO. Unit refinery process oil CPO and CPKO into RBDPO and RBDPKO. Non-specific oils are reprocessed, causing production targets is not reached. The number of product defect may increase the cost and production time. Thus it is necessaryto improve quality in order to minimize defect product. Quality control is done using the Six Sigma method that aims to minimize defects and is used as a measure of quality control. Sigma value results obtained in the calculation of the value of plant 4 is between 3 to 4 in the period October 2015 - January 2016. The sigma value states that the company is in average condition of the company. With the implementation of six sigma method is expected of quality control in the companies will be better and the target of 3.4 DPMO can be achieved.

USULAN PERBAIKAN SISTEM PERSEDIAAN UNTUK MEMINIMASI BIAYA TOTAL PERSEDIAAN MENGGUNAKAN METODE OPTIONAL REPLENISHMENT PADA PT SANTOMIC MITRA BERSAMA Farah Azaria Kirana; Muhammad Mujiya Ulkhaq
Industrial Engineering Online Journal Vol 7, No 1 (2018): WISUDA PERIODE JANUARI 2018
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Diponegoro

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Penelitian ini bertujuan untuk memperbaiki dan menganalisis sistem persediaan bahan baku sticker yang digunakan PT Santomic Mitra Bersama. Sistem persediaan yang digunakan perusahaan saat ini yaitu setiap 2 bulan sekali dan ketika stock bahan baku sticker habis baru pemesanan dilakukan tanpa adanya pengecekan persediaan bahan baku yang berkala sehingga menghambat proses produksi sticker. Usulan perbaikan ini dilakukan karena pada laporan tahunan perusahaan di tahun 2015 diketahui bahwa terdapat konsumen yang membatalkan pesanan sticker dikarenakan stock bahan baku sticker tidak ada atau habis. Oleh sebab itu, perlu diadakan perbaikan pada sistem persediaan perusahaan saat ini dengan memperhitungkan minimasi biaya total persediaan yang diharapkan perusahaan dapat mengetahui sistem persediaan bahan baku sticker yang lebih baik. Salah satu metode yang dilakukan untuk memperbaiki sistem persediaan adalah dengan optional replenishment. Dengan menggunakan optional replenishment maka perusahaan dapat mengetahui titik pemesanan kembali, kuantitas pemesaan, periode pengecekan inventori, persediaan pengaman dan total biaya inventori.ABSTRACT Improvement For Inventory System To Minimize Total Costs Of Supplies Using Optional Replenishment Method In PT Santomic Partner Bersama. This research aims to improve and analyze the inventory system of sticker raw materials used by PT Santomic Mitra Bersama. The inventory system used by the company today is every 2 months and when the stock of raw materials sticker out a new order is made without checking the supply of raw materials that periodically hamper the production process sticker. Proposed improvement is done because the company's annual report in 2015 known that there are consumers who cancel the order sticker because the stock of sticker raw material does not exist or run out. Therefore, it is necessary to make improvements to the company's inventory system at this time by taking into account the minimization of total inventory costs that companies are expected to know the better provision of sticker raw materials. One of the methods done to improve the inventory system is by optional replenishment. By using optional replenishment, the company can know the point of reorder, rural quantity, inventory checking period, safety stock and total inventory cost.

Perencanaan Kebutuhan Persediaan Material Bahan Baku Pada CV Endhigra Prima dengan Metode Min-Max Cynara Kezia Yedida; Muhammad Mujiya Ulkhaq
Industrial Engineering Online Journal Vol 6, No 1 (2017): Wisuda Periode Januari Tahun 2017
Publisher : Program Studi Teknik Industri, Fakultas Teknik, Universitas Diponegoro

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Perkembangan dunia industri yang berlangsung pesat menyebabkan terjadinya persaingan yang meningkat antara perusahan–perusahaan dalam memenuhi kebutuhan konsumen. Setiap perusahaan yang bergerak di bidang pengadaan barang atau jasa perbaikan memerlukan persediaan. Persediaan adalah bahan atau barang yang disimpan yang akan digunakan untuk memenuhi tujuan tertentu. Persediaan dapat berupa bahan mentah (raw materials), bahan pembantu, barang dalam proses, barang jadi, ataupun suku cadang. Untuk menjaga kelangsungan beroperasinya suatu pabrik atau fasilitas lain, diperlukan bahwa beberapa jenis material tertentu dalam jumlah minimum tersedia di gudang, supaya sewaktu-waktu ada yang rusak, dapat langsung diganti. Tetapi material yang disimpan dalam persediaan juga jangan terlalu banyak, ada maksimumnya, agar biayanya tidak menjadi terlalu mahal. CV Endhigra Prima merupakan perusahaan home industry yang bergerak dalam pembuatan peralatan-peralatan untuk keperluan suatu acara tertentu dengan berbagai produk yang ditawarkan diantaranya piring plastik emas, topi ulang tahun, dll. Pada jurnal kali ini akan dilakukan perhitungan mengenai jumlah inventori pada CV Endhigra Prima agar perusahaan agar dapat menentukan persediaan dengan tepat dan berdasarkan hasil perhitungan menggunakan metode min-max perusahaan tidak akan mengalami out of stock dengan besar tingkat pemesanan untuk plastik emas 2108 ton, lem 913 ton, dan kertas aval 21084 ton. Selain itu dengan menggunakan metode min-max, CV Endhigra Prima dapat melakukan penghematan terhadap biaya pengeluaran yaitu dari 78.181.000 rupiah menjadi 55.318.000 rupiah. ABSTRACT [Title: Material Requirements Planning Supplies Raw Materials In CV Endhigra Prima with Min-Max method]. The development of the industry that took place rapidly led to increased competition between companies to meeting the needs of consumers. Every company engaged in the procurement of goods or services requiring repair supplies. Inventories are materials or goods stored to be used to fulfill a specific purpose. Inventories can be raw material,, auxiliary materials, goods in process, finished goods, or parts. To maintain the continuity of the operation of a plant or other facility, it is necessary that some kind of specific material in a minimum amount available in the warehouse, so that at any time there are damaged, can be replaced. But the material is stored in inventory is also not too much, there is a maximum, so that cost does not become too expensive. CV Endhigra Prima is a home industry company engaged in the manufacture of equipment for the purposes of a specific event with a range of products offered include plastic plates of gold, birthday hats, etc. In the journal this time will be calculated on the amount of inventory on the CV Endhigra Prima order company in order to determine supply with accurate and based on calculations using the min-max company will not experience out of stock with greater levels of bookings for plastic gold 2108 tons, glue 913 tons, and paper aval 21 084 tonnes. Besides using the min-max, CV Prima Endhigra can make savings on the cost of expenses, from 78.181 million rupiah to 55.318 million rupiah.

Redesain Kemasan Makanan Ringan Olahan pada UMKM Center Jawa Tengah dengan Metode Kansei Engineering Susatyo Nugroho; W, Darminto Pujotom; M. Mujiya Ulkhaq; Dedy Teguh Permadi
Performa: Media Ilmiah Teknik Industri Vol 16, No 1 (2017): PERFORMA Vol. 16, No 1 Maret 2017
Publisher : Industrial Engineering Study Program, Faculty of Engineering, Universitas Sebelas Maret

UMKM (Micro, Small, and Medium Enterprises) Center in Central Java Province has 69 types of potential culinary products in the form of snacks. An initial study showed that from 47 MSMEs, there are 45 products which are packaged simply. The research was conducted to create a new packaging design which is appropriate for consumers' needs using Kansei Engineering. The method translates consumers' psychological feelings into new packaging design parameters as well as statistics analysis to elicit design elements in accordance with Kansei Word. Affective and psychological aspects that affect consumers on product packaging are "adorable" and "simplicity". Each component has different Kansei word variables. Adorable component has informative, modern, colorful, interesting, and distinctive variables; whereas Kansei word with the largest weight is colored with the value of 0.961 and the smallest weight is modern with the value of 0.819. Simplicity component has simple, easy-to-carry, and easy-to-open; whereas Kansei word with the largest weight is easy-to-open with the value of 0.927 and the smallest weight is simple with the value of -0.414.

Barriers of Reverse Logistics Implementation: A Case Study in a Car Battery Industry in Indonesia Diana Puspita Sari; M. Mujiya Ulkhaq; Dyah Ika Rinawati; Dyah R. Rasyida
International Journal of Supply Chain Management Vol 7, No 5 (2018): International Journal of Supply Chain Management (IJSCM)
Publisher : International Journal of Supply Chain Management

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There is a kindly new concept in logistics that related to the reusing, remanufacturing, and refurbishing of products, announced as reverse logistic (RL). While conventional or forward logistics is defined as the process of moving goods from the point of origin to the point of consumption, RL is defined contrarily. It allows the return of the products to be recycled, reworked, reused, or crushed for disposal. It has been growing out worldwide, affecting all the levels of supply chains in various industry sectors since the best RL operations would lead to higher sales revenue and reduced costs. However, regardless of its benefits, there are some barriers of the RL implementation, especially in the developing countries. The objective of this research is to identify the barriers of RL implementation in a car battery industry in Indonesia and study the interaction among those barriers to find the the root barrier using interpretative structural modelling. These barriers are then further analyzed using MICMAC analysis to look for the priority of the strategy to manage the barriers. The finding could help the managers to generate some policies toward the RL implementation.

THE DETERMINANTS OF INDONESIAN STUDENTS’ MATHEMATICS PERFORMANCE: AN ANALYSIS THROUGH PISA DATA 2015 WAVE M. Mujiya Ulkhaq
Media Bina Ilmiah Vol. 17 No. 8: Maret 2023
Publisher : LPSDI Bina Patria

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33578/mbi.v17i8.331

This study investigates the determinants of Indonesian students’ performance of mathematics proxied by plausible value (PV) of mathematics provided by OECD PISA. The PISA 2015 data is used to answer this research question. A multivariate linear regression is used; as the dependent variable is PV of mathematics, while the information concerning student’s background is used as independent variables, i.e., student’s personal characteristics: age and gender; family background: index of economic, social, and cultural status as well as ICT possession at home; and classroom’s climate: perceived feedback from teacher. Result shows that all determinants but student’s gender are significant at the level of 5%. Several tests to examine the classical assumptions, such as normality of the residuals, test for heteroscedasticity and collinearity are performed. According to these tests, no severe problems occur.

A SLACKS-BASED MEASURE OF EFFICIENCY IN DATA ENVELOPMENT ANALYSIS TO ASSESS EFFICIENCY OF INDONESIAN SHARIA BANKS M. Mujiya Ulkhaq
Khatulistiwa Vol 13, No 1 (2023)
Publisher : The Pontianak State Institute of Islamic Studies

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24260/khatulistiwa.v13i1.2381

With the development of sharia banks, one of the effects that occurs is the existence of competition among sharia banks. The objective of this study is then to analyze the efficiency of sharia banks in Indonesia. Understanding the efficiency is important because if banks perform consistently with full efficiency, the less inputs they use, the larger output they achieve. The output is measured by total earning asset, while the inputs used are total deposit and total operating costs. A slacks-based measure of efficiency in data envelopment analysis is used to accomplish the objective of the research. Result shows that among twelve sharia banks under-investigated, four of them are considered as the most efficient.

A Data Envelopment Analysis Approach to Assess Technical Efficiency of Large and Medium Manufacturing Industry in Central Java Province, Indonesia M. Mujiya Ulkhaq; Trisna Nagris Pratiwi
International Economic and Finance Review Vol. 1 No. 2 (2022): INTERNATIONAL ECONOMIC AND FINANCE REVIEW (IEFR)
Publisher : Sekolah Tinggi Ekonomi dan Perbankan Islam Mr. Sjafruddin Prawiranegara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56897/iefr.v1i2.19

Technical efficiency of Indonesian manufacturing industry has been measured in several studies. However, there is limited study conducted in large and medium manufacturing industries context. This study, therefore, aims to analyse the technical efficiency of the large and medium manufacturing industries in Central Java Province, Indonesia. Understanding the technical efficiency is important as firms with full technical efficiency, the less inputs they use, the larger output they achieve. Data envelopment analysis with output-oriented and variable returns-to-scale is used to accomplish the objective of this study. The output is measured by total output value, while the inputs are cost of labour, raw materials, other materials, fuel, electricity, and fixed capital. Result shows that among twenty-four decision-making units under-investigated, six of them are considered as the most efficient. Keywords: Central Java Province, data envelopment analysis, Indonesia, industry, large and medium manufacturing

Co-Authors Abdi R. Silalahi Abdul Ghofar Arizal Rusdiyato Bambang Purwanggono Christiani, Skolastika D. K. Cynara Kezia Yedida Dedy Teguh Permadi Della Mustika Putri Diana Puspita Sari Dyah Ika Rinawati Dyah R. Rasyida Dyah Rachmawati Rasyida Elieser L. Tarigan Elsa Idolla Ginting Fani Tania, Fani Farah Azaria Kirana HALIM, RIFKI Hera, Silvia Helvi Hurisandi, Viky Lintang Ayu Karisma Dewi M. Agung Wibowo Mahdy Rohmadoni Matondang, Tio Prima Mersi Liwa'u Dina Monalisa Putri Br. Barus N. W. PRAMONO, SUSATYO Naniek Utami Handayani Niniek Widyorini Pradita Yusi Akshinta Pramono, Susatyo Nugroho Widyo Pratiwi, Trisna Nagris Putri, Jeihan Iftahlana Rasyida, Dyah R. Rochmatullah, Putra Dluha Samuel H. Pandiangan Septina G. Lumbantobing Simamora, Sandy J. H. Sintawati, Harum Suryanti - Susatyo Nugroho Tio Prima Matondang Trisna Nagris Pratiwi Umam, Muhammad Mufti Vina Aulia Firdausa W, Darminto Pujotom Wahmil, Dori Susadi

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