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All Journal Sinergi FT Industrial and Systems Engineering Assessment Journal (INASEA) ComTech: Computer, Mathematics and Engineering Applications
Ho Hwi Chie
Binus University
Computer Science & IT Engineering Industrial & Manufacturing Engineering Mathematics Mechanical Engineering

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THE APPLICATION OF CONCURRENT ENGINEERING METHOD SUPPORTED BY VIRTUAL PROTOTYPING BASED CAD AND CAE (CASE STUDY: INTEGRATED PASSENGER SEAT PRODUCT DESIGN AND ERGONOMICS ANALYSIS USING VIRTUAL PROTOTYPING) Chie, Ho Hwi
Industrial and Systems Engineering Assessment Journal (INASEA) Vol 11, No 2 (2010): INASEA Vol. 11 No. 2
Publisher : Industrial and Systems Engineering Assessment Journal (INASEA)

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Abstract

Effective fuzzy front planning end in product development phase is very important steps to achieve successful product in the market. Success in ergonomics is not only determined by the design itself, but also by the time and cost incurred. Some of the contributing factors to the high cost of the product are lack of ergonomics skill of designer that lead to the trial and error nature of constructing the ergonomics product. Innovation ability of designer in small medium enterprise is often restricted by the fact that designer have lack knowledge of ergonomics. This difficulty can be reduced significantly with the application of concurrent engineering method supported by virtual prototype based CAD (computer aided design) and CAE (Computer Aided Ergonomics). We can integrate ergonomics with product design optimization and anthropometric parameter for suitable target market prior to production. Also we can anticipate all potential injuries caused by humanproduct interaction during use. Effective product planning is expected to contribute to lower production cost, to cross the innovation border, and boost up Company’s competitive advantage.
SKALA PENGUKURAN SHIFT KERJA, BEBAN KERJA, DAN PERSEPSI KESEHATAN SEBAGAI STRESSOR DENGAN FASILITAS MANAJEMEN UNTUK PENANGGULANGANNYA Chie, Ho Hwi; Zuraida, Rida
Industrial and Systems Engineering Assessment Journal (INASEA) Vol 14, No 1 (2013): INASEA Vol. 14 No. 1
Publisher : Industrial and Systems Engineering Assessment Journal (INASEA)

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Abstract

Human circadian system causes employees on night shift are at risk of experiencing increased stress, increased workload. Additionally, they should face the consequences of different health condition compared to employees who work on a normal shift during the day. This paper discussed the size of stress levels of employees who work in a night shift system based on (1) workload and (2) health condition, as well as (3) employee’s biological, social, and psychological condition. Other studies have shown that support from company can help employees cope with stress. The support is like management facilities, such as support from supervisor to subordinate, and training support to improve necessary skills. Thus, besides the size of employee stress levels, this study also discusses the relation of company support as stress management. The result is a measurement model of stress level obtained based on Likert scale of 5. In this model, work shift stressors are measured by self-perception of self-satisfaction by the work shift. For occupational health perception, SF-36 is used to measure self-perception of health quality. As for the workload, the measurement of four resources at works using the scale of visuality, audiotory, cognitive, and psycomotor. The implication shows that this stressor measurement scales need to be tested to see the reliability and validity of the work environment in Indonesia, as well as to test the correlation between the variables used with management facilities received by employees.
KAJIAN PERILAKU BERSEPEDA MOTOR DI JAKARTA Chie, Ho Hwi; Widaningrum, Dyah Lestari
Industrial and Systems Engineering Assessment Journal (INASEA) Vol 15, No 1 (2014): INASEA Vol. 15 No. 1
Publisher : Industrial and Systems Engineering Assessment Journal (INASEA)

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Abstract

This study aims to test the hypothetical model that describes the correlation between motorcycling behavior and four latent variables assumed to make up bikers in action. A survey of 350 motorcyclists through purposive sampling was done by employing a research instrument. Validity and reliability test of research instrument were conducted by calculating the Cronbachs Alpha. Whereas, the hypothesis model test was conducted using statistical technique of Structural Equation Modeling (SEM) through Lisrel 8.72 software. CFI, Chi-square, and RMSEA are fit indexes used to test the suitability of the hypothesis model with field data (model fit). Structural Equation Modeling (SEM) and Confirmatory Factor Analysis (CFA) were used to evaluate the reliability and structural validity of the instrument used. Besides, they were used to test the hypothesis that a positive relationship between the observed variables and the four latent variables, as well as a positive relationship between the four latent variables and motorcycling behavior construct.
Penerapan Metode DMAIC dalam Peningkatan Acceptance Rate untuk Ukuran Panjang Produk Bushing Chandra, Andry; Yudhistira, Yudha; Hartoyo, Ferdian; Chie, Ho Hwi
ComTech: Computer, Mathematics and Engineering Applications Vol 3, No 2 (2012): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v3i2.2333

Abstract

Bushing is one of the eminent product of PT Indokarlo Mighty. The company requires some suppliers of iron cutting services to continue providing high qualified raw materials. The quality is the accuracy of the intended length of the products which is able to meet the requirements of the requested length. The purpose of this study is to determine what factors caused the defect on the length of the products. In addition, it is objected to provide appropriate solutions to eliminate to the factors, so that the number of defected products can be reduced. This study uses the methodology of Six Sigma improvement models Define-Measure-Analyze-Improve-Control (DMAIC) to make improvements in the quality of services provided by PT Argatama Multi Agung, while the improvement phase uses Design of Experiment (DOE) to find the machine configuration that can produce the best quality products. A significant increase in sigma is obtained from the conducted research.
OPTIMIZATION OF PROCESS PARAMETERS ON TENSILE SHEAR LOAD OF FRICTION STIR SPOT WELDED ALUMINUM ALLOY (AA5052-H112) Armansyah, Armansyah; Chie, Ho Hwi
SINERGI Vol 22, No 3 (2018)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/sinergi.2018.3.007

Abstract

Optimization of the process was still the issue in manufacturing. Investigation on the process parameters that effects to the property of welded structure were necessary. In this study, the AA5052-H32 sheets of 2 mm thick were welded using friction stir spot welding (FSSW) and tested via tensile shear load test to investigate the influence of spindle speed, tool depth, and dwell time to the tensile shear load of the joints. The result shows that in every set of parameter combination, exhibit interesting influence to the tensile shear load. The effect of spindle speed of 1000 rpm shown the good property in average 18.33 KN especially at tool depth of 3.5 mm. Furthermore, the effect of tool depth brought significant effect to the tensile shear load especially at 3.5 mm for each set of spindle speed and dwell time. The set of dwell time to parameter combination had no significant effect to the tensile shear load. The good tensile shear load could be achieved in the range of 17.7-19.3 KN at 3.5 mm of plunge depth and 1000 rpm of spindle speed, where the best one was 19.3 KN at 7s of dwell time.
Pengujian Skala Pengukuran Kelelahan (Spk) pada Responden di Indonesia Zuraida, Rida; Chie, Ho Hwi
ComTech: Computer, Mathematics and Engineering Applications Vol 5, No 2 (2014): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v5i2.2357

Abstract

Subjective fatigue measurement instruments, based questionnaire, is a measure that is widely used for reasons of practicality and measurement results can be obtained quickly. For the purposes of measuring fatigue, there are a number of questionnaires commonly used abroad, but not a lot of literature with a case study in Indonesia that utilize this instrument. Of course, the reason for the use of the instrument is based on the expectation that the instrument has high validity and reliability, and if possible to have a high level of practicality as well. Asssment Fatigue Scale (FAS) is one of the suggested use as a measurement of worker fatigue. The instrument consists of a 10 item questionnaire with good reliability level. The discussion in this paper covers Measurement Scale Fatigue testing results via questionnaires measuring fatigue, adapted from the FAS in English and translated into Indonesian. DSS consists of 10 questions using 5 Likert scale, for the answer options are: never (1), sometimes (2), perceived a regular basis (3), is common (4), is always experienced (5). Relaibilitas test results using Cronbach alpha values obtained value of 0812, and can be improved if the item is question number 3 is removed. By implication, this questionnaire is good enough to use as a measuring instrument fatigue, but the level of proficiency in Indonesian language, in this CMS, needs to be repaired, especially for question number 5 and 3 if the level of validity and reliability to be improved, although the increase may not be too significant.
Porcelain Product Quality Analysis in PT XYZ Chie, Ho Hwi; Nasution, Januar; Ayu, Ketut Gita; Septivani, Nike; Renaldi, Yualfin
ComTech: Computer, Mathematics and Engineering Applications Vol 6, No 4 (2015): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v6i4.2195

Abstract

PT. XYZ is a company engaged in manufacturing porcelain dinner ware such as plates, cups, teapot, bowl, etc Porcelain product is safe for use and product defect will only affect the aesthetic not the functional side. The company always maintain the quality of the products produced as by maintaining a good product, in terms of visuals, will keep customers interested in the product. Good quality products characterized by quality A / B and C, and the product defect characterized by the quality of D, Lost, and BU. Concepts and methods used to analyze is a statistical process control (SPC) which includes Pareto diagram, fraction nonconformities, flow charts and fishbone diagrams and management tools (fault tree analysis). Statistical Process Control (SPC) is one of the methods, which includes Pareto charts, fraction nonconformities, flow chart, and fishbone diagram and also management tools (fault tree analysis). SPC is useful to find the facts from the problems and factors that affect the quality of the products, while fault tree analysis is useful to analyze each of the production process.
Pengendalian Kualitas Produk Lembaran Serat Semen Rata di Pt Bakrie Building Industries Dengan Metode DMAIC Chie, Ho Hwi; Ambadar, Muhammad Zaky; Hidayat, Wahyu; Abdillah, Sutan Rieza
ComTech: Computer, Mathematics and Engineering Applications Vol 1, No 2 (2010): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v1i2.2697

Abstract

Producing quality products to match customer expectations is an important thing that needs to be done by every company that produces any product, to gain public appreciation and sell their products on the market. Therefore companies need to have a strong commitment in improving and maintaining product quality. The study related to product quality of flat sheets of fiber cement or more commonly known as versaboard produced by PT. Bakrie Building Industries show that there are 9 (nine) types of defects that can degrade the quality of production. Most dominant defects occured on 3 (three) versaboard products, the crack (2.03%), broken end (0.80%) and side trim (0.35%) during observation. Sigma level of products is obtained at 4:16 at a cost saving of due to defects of Rp.14.645.600, 00. Defects that occur tend to be caused by methods, people, machines, and materials used. Efforts to reduce the level of defects are done by making the SOP of the break-up method, and manufacture of cutter flow diagram. REBA score calculation results (Rapid Entire Body Assessment) in the removal and break-up reduction is obtained at 8 with a high level of risk should lead to improving the position of the operator using the Rapid Entire Body Assessment (Reba) so that operators can work more carefully and responsibly.. 
Penerapan Metode Dmaic dalam Peningkatan Acceptance Rate untuk Ukuran Panjang Produk Bushing Hartoyo, Ferdian; Yudhistira, Yudha; Chandra, Andry; Chie, Ho Hwi
ComTech: Computer, Mathematics and Engineering Applications Vol 4, No 1 (2013): ComTech
Publisher : Bina Nusantara University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21512/comtech.v4i1.2761

Abstract

PT Argatama Multy Agung is one provider of metal cutting services using turret machine. The quality of metal cutting services offered are still questioned. The quality service intended is that the length accuracy of the outcome product meets the requirements of the requested length. The purpose of this study is to determine what factors lead to defects the goods length, as well as to provide the right solution that factors can be eliminated so that the number of defective products can be reduced. In this research authors implement Six Sigma methodology with an improved model of Define-Measure-Analyze-Improve-Control (DMAIC) to perform improvement in the services quality provided by PT Argatama Multy Agung. On the improvement phase Design Of Experiment (DOE) is used to find the machine configuration that can produce the best quality. From the research conducted, a significant increase of sigma is obtained. 
Co-Authors Abdillah, Sutan Rieza Ambadar, Muhammad Zaky Armansyah Armansyah Chandra, Andry Dyah Lestari Widaningrum Hartoyo, Ferdian Ketut Gita Ayu Nasution, Januar Nike Septivani Renaldi, Yualfin Rida Zuraida Wahyu Hidayat Yudhistira, Yudha