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ComTech: Computer, Mathematics and Engineering Applications
Published by Universitas Bina Nusantara
ISSN : 20871244     EISSN : 2476907X     DOI : -
Core Subject : Science, Education, Engineering,
Computer Science & IT Engineering Mathematics
The journal invites professionals in the world of education, research, and entrepreneurship to participate in disseminating ideas, concepts, new theories, or science development in the field of Information Systems, Architecture, Civil Engineering, Computer Engineering, Industrial Engineering, Food Technology, Computer Science, Mathematics, and Statistics through this scientific journal.
Arjuna Subject : -
Articles 1,585 Documents
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Metode DMAIC Sebagai Solusi Pengendalian Kualitas Produksi Sepatu Tambang: Studi Kasus PT Mangul Jaya-Bekasi Hendy Tannady Tan
ComTech: Computer, Mathematics and Engineering Applications Vol. 3 No. 1 (2012): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v3i1.2450

Abstract

One way to increase profitability internally in PT Mangul Jaya - Bekasi is decreasing any costs produced from poor product quality by producing shoes with good quality. This study uses the DMAIC (define, measure, analyze, improve, control) method as a measuring tool. DMAIC is a quality improvement method that directly solves any problems related to the quality of a product even the primary cause of it. From the results of the study it is concluded that at the phase “define” shoes type Cheetah is the most problematic. Furthermore, on phase “measurement” it is identified that the Cp value of the Cheetah is below 1 which means that the process capability is low. After passing through the three sequencing steps (analyze, improve and control), finally this research is able to reduce the defects that occur in the shoes type Cheetah.
Analisis Kelayakan Investasi Perluasan Pabrik dengan Metode Cost-Volume-Profit dan Incremental pada PT XYZ, Jakarta Jonny Jonny
ComTech: Computer, Mathematics and Engineering Applications Vol. 3 No. 1 (2012): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v3i1.2451

Abstract

PT XYZ received an offer of toll manufacturing services from its client as much as 360 units at a price of Rp14.000 for four years. To be able to fulfill the offer, the company must issue an investment of Rp1,3 billion for the plant expansion regarding to the limited capacity and specificity of the engine that must be purchased separately. There is also some additional operational cost for the company. Based on the analysis of costvolume-profit (CVP) the company realized that the price offered is far below the desired corporate profit by 27% so that the new price agreed upon in the negotiation is Rp16.000. Meanwhile, using the price agreement and macroeconomic assumption for the next four years, the company can finally concluded to accept the offer of its client with a value weighted NPV up to Rp306, 5 million based on the incremental analysis.
Upaya Penurunan Kejadian Kehilangan Gelas Berukuran Sedang Melalui Penerapan Metode Quality Control Circle (QCC) di Unit Gizi, RS ABC, Jakarta Jonny Jonny
ComTech: Computer, Mathematics and Engineering Applications Vol. 3 No. 1 (2012): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v3i1.2452

Abstract

Nutrition Department of ABC Hospital provides food and beverage for all inpatients based on nutrition standard from their practioners. Therefore, Nutrition Department needs several types of cutlery for serving them food and beverage as needed. The stock of these types of cutlery should be maintained by nutrionists. During August and September 2011, the stock of middle-sized glasses had been deficit. This condition made the Nutrition Department initiate a QCC group named Sushi to prevent the deficit by strengthening the control over the stock. After this improvement, they had successfully suppressed the deficit from 193 to 77 units or 60.10%. Due to hospital regulation that every lost should be redeemed by nutritionist, this improvement had also enable the department to suppreesed the cost of lost units (quality cost).
Usulan Tata Letak Ulang Menggunakan Software Quantitative Systems untuk Meminimalkan Jarak Perpindahan Bahan di Lantai Produksi Departemen Mechanic PT Jefta Prakarsa Pratama Khristian Edi Nugroho; Dimas Rahmawan; Prayogo Adi Utomo
ComTech: Computer, Mathematics and Engineering Applications Vol. 3 No. 1 (2012): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v3i1.2453

Abstract

The layout applied on the production floor of the Department of Mechanic of PT. Jefta Prakarsa Pratama is not considered as an optimal layout. The reason triggered this optimal level, are some backtrack movements that reduce the effectiveness and efficiency of material handling activities. This research refers to two types of calculation methods. First, manual calculation, which is rectilinear distance measure. Second, computerized calculation, which is Quantitative Systems (QS) software. There are three critical criterias referenced in this research, i.e. straight flow of material, more minimal backtrack movement, and more minimal material moving distance. The iteration results using QS software are translated into block layout and then are made as a proposed layout. The rectilinear calculations performed manually are intended to calculate the total of material moving distance. The data processing obtained a re-layout solution which is more optimal for the production floor of the Department of Mechanic, because it could reduce backtrack distance by 75.28% and the material moving distance by 30.03%. The implementation of the proposed layout is expected to reduce the time of material moving activity on the production floor of the Department of Mechanic, so that the material moving process could run more effectively and efficiently.
Perancangan dan Implementasi Aplikasi Internet Radio Menggunakan Multimedia Database Melalui Penerapan Ontology dan Metadata M. Rudy Erwansyah; Ong Budi Setiawan; Bahtiar S. Abbas
ComTech: Computer, Mathematics and Engineering Applications Vol. 3 No. 1 (2012): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v3i1.2454

Abstract

The study aims to analyze, design and implement the internet radio application used in managing the audio data on Heartline FM radio station. In this application, the audio data which has been managed can be used in a radio broadcast scheduling. The scheduled radio broadcast is then forwarded to the webcast server to be transmitted through the Internet. This research carries out analysis, design and implementation using Object Oriented Analysis and Design method and Lean Architecture for Agile Software Development. The program component design consists of: (1) software functional system, (2) user interface, (3) problem domain model, which in internet radio application is divided into five subcomponents, namely: audio-indexing-retrieval, scheduling, reporting, user and ontology. In the implementation of internet application of this radio, the audio data management uses multimedia database by applying metadata and ontology, so that the process of indexing and retrieval can be reused quickly on the broadcast. This application can also be used in carrying out the radio broadcast automatically during specified hours. This internet radio application has been able to meet the needs of radio Heartline.
Proses Produksi di Pabrik Tabung Elpiji Nike Septivani
ComTech: Computer, Mathematics and Engineering Applications Vol. 3 No. 1 (2012): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v3i1.2455

Abstract

Currently the use of liquefied petroleum gas is urgently needed as a substituting fuel in both household sector and industrial sector. The Government’s program namely the conversion of kerosene to LPG encouraged people who still use kerosene as a fuel to switch to LPG. There are some public complaints about the quality of the conversion product such as conflagration that occurs frequently caused by the explosion of LPG tube. Application of SNI LPG tube related to the energy conversion program is expected to give a safer condition to the users. This study is conducted by analyzing the quality requirement of LPG tube products according to SNI as well as to identify the fulfillment of LPG tube products.
Analisis Penyebab Nyeri dan Ketidaknyamanan dalam Bekerja pada Pengrajin Keset Kain Limbah–Pringapus Semarang Rida Zuraida
ComTech: Computer, Mathematics and Engineering Applications Vol. 3 No. 1 (2012): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v3i1.2456

Abstract

This research identified any kind of work condition and craftsman’s posture that trigger the pain and discomfort for craftsman of doormat in Pringapus, Semarang. Observation of the work condition is conducted including work facilities and their posture during sewing process. To identify their pain and discomfort, Nordic Musculoskeletal Questionnaire (NMQ) is used as reference. The result is used as an input for rapid upper limb assessment worksheet (RULA) to determine the level of the risk. RULA’s final score is indicated the conditions need further investigation and change may be needed. Based on the analysis using fishbone diagram, to overcome pain/discomfort in the area of the neck and the shoulder, high adjustment of table and seat is suggested, because the evidence shows they trigger the craftsmen’s bad posture. For pain/discomfort of back and waist, the seat should have good back support. Whereas for the hip, the craftsman suggested to use the seat with thick and wider sleeper, so they can sit comfortably. For foot problems, to relieve the pain for their free feet, it is suggested to use a bench that functions as foot rest; and for the sewing feet, it is suggested to give heels support so the sewers' heels can be free from strain while sewing.
Pengendalian Kualitas untuk Meminimalkan Jumlah Cacat pada Produk Kaleng Aeorosol Rida Zuraida; Bima Rantautama; Notri Sutrisnohadi; Chondro Dewo Adi Pratomo
ComTech: Computer, Mathematics and Engineering Applications Vol. 3 No. 1 (2012): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v3i1.2457

Abstract

2.64% is the largest defect percentage of aerosol can product of PT Multi Makmur Indah Industri. To improve the product quality, the study focused on the goal of reducing the percentage of defects using the Statistical Quality Control. After gaining control of the company, we can calculate the process capability in the aerosol can manufacture. The next step is identification of the defects causes that arise using the failure mode and effect analysis (FMEA) method to measure the defect causes risks and as an input in determining control recommendations. From the observations and data processing, it is recognized that the overall phase of the process has a process capability value above 99%. 80% of defects in the aerosol cans product occur during the process of can making, component making and printing. While the most risking defect cause is the destruction ofmachine B coating on the printing process (RPN = 245) and the quality of the welding wire on can manufacturing process (RPN = 160). Therefore, the solution to reduce the defect percentage is replacing the damaged coating machine B as well as upgrading the quality of the welding wire. Thus, it can reduce the losssale as much as 1.06% (Rp110,716,000) per month.
Aplikasi Perangkat Ajar Kebudayaan Indonesia Berbasis Multimedia Agustinna Yosanny; Yen Lina Prasetio; Adriani Halim; Yunair Octaarianti Octaarianti S. A.
ComTech: Computer, Mathematics and Engineering Applications Vol. 3 No. 1 (2012): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v3i1.2458

Abstract

The purpose of this research is to design a CAI application as a learning support and media to introduce the valuable cultures of Indonesia. The CAI is objected to children or people using computer. The research applied the Interactive Multimedia System Design & Development (IMSDD) method, which consists of system requirement, design consideration, implementation, and evaluation. The result of this research is a CAI application about Indonesian culture based on multimedia that fulfills the user’s need on CAI application. CAI is expected to grow users’ interest about Indonesian culture, improve children’s memory capability, and help create the learning process more interesting and fun.
Pengembangan Basis Data Penjualan, Persediaan dan Logistic Tracking: Studi Kasus PT Abhimata Citra Abadi Ayuliana Ayuliana; Nadya Permata Putri; Araminta Pranoto; Ronald Novembry
ComTech: Computer, Mathematics and Engineering Applications Vol. 3 No. 1 (2012): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v3i1.2459

Abstract

This study aims at designing a database system processes sales, inventory, and goods tracking in accordance with the needs of PT Citra Abadi Abhimata, as well as building the application program. This system records each process in a flow of goods, ranging from the entry of the principal goods until the goods are sold to end customers plus goods tracking. This study uses the fact finding method carried out by a direct field study at the company concerned, interviews with relevant parties, studying the company’s documentation, and literary study of textbooks. Furthermore, database design uses the three design concepts (conceptual design, logical design and physical design), as well as the interface design to create the application program. The result obtained is a data base system and application that can improve the company’s performance since data is stored on a regular basis so that it can be easily obtained when needed. The existence of this database design, along with related application, makes the company easier to manage data and monitor the process of goods flow and produce better work.

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