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All Journal Jurnal Sains dan Seni ITS Jurnal Teknobisnis Jurnal Matematika Sains dan Teknologi

Sony Sunaryo

Institut Teknologi Sepuluh Nopember

Author-ID : 2674756

Agriculture, Biological Sciences & Forestry Arts Humanities Decision Sciences, Operations Research & Management Mathematics Other

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Articles

MENGATASI MASALAH MULTIKOLINEARITAS DAN OUTLIER DENGAN PENDEKATAN ROBPCA (STUDI KASUS ANALISIS REGRESI ANGKA KEMATIAN BAYI DI JAWA TIMUR) Sony Sunaryo; Setiawan Setiawan; Tiodora Hadumaon Siagian
Jurnal Matematika Sains dan Teknologi Vol. 12 No. 1 (2011)
Publisher : LPPM Universitas Terbuka

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Multicollinearity and outliers existence in data can be detected by various techniques. Principal Component Analysis (PCA) is one of the statistical techniques that can be used to handle data reduction and multicollinearity problem. However, PCA is very sensitive to outliers as it based on the mean and the covariance matrix. Hubert et al. (2005) developed ROBPCA, a robust PCA to the outliers existence. The ROBPCA combines PP technique and Minimum Covariant Determinant (MCD) method for solving outliers problem. In the present study, ROBPCA is applied to the study case of the regression analysis of infant mortality rate in East Java Province in 2009. The result shows that ROBPCA is more robust compare to PCA when data contains outlier. ROBPCA can explain 85.6 percent of variation by 2 principal components, whereas, PCA needs 3 principal components to explain 86.6 percent of variation. Moreover, ROBPCA produces higher coefficient determination which means the regression model using ROBPCA is better in explaining response variable. The study findings also revealed that the average of duration of exclusive breastfeeding has the largest contribution in lowering infant mortality rate followed by percentage of delivery assisted by medical provider and percentage of households that have access to safe drinking water.

Analisis Pengelompokkan Negara-Negara Importir Produk Indonesia Berdasarkan Faktor Barang Industri Jalu Handoko; Sony Sunaryo
Jurnal Sains dan Seni ITS Vol 3, No 2 (2014)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat (LPPM), ITS

Bidang industry merupakan salah satu penyumbang pendapatan terbesar Negara Republik Indonesia. Ekspor merupakan salah satu cara bagi Negara untuk meningkatkan pendapatannya. Ekspor hasil industry menjadi salah satu penyumbang pendapatan Negara terbesar disampin gekspor mineral tambang. Negara importir yang terkait dengan Indonesia total berjumlah ratusan, hal ini tentu memerlukan klasifikasi yang baik agar strategi ekonomi dan peraturan pemerintah lebih akurat dalam memaksimalkan keuntungan ekonomi negara dari sektor ekspor industri. Analisis biplot dan diskriminan merupakan salah satu metode klasifikasi yang baik dan sederhana dalam melakukan klasifikasi secara tepat. Analisis biplot bertujuan untuk melakukan pengelompokkan awal secara visual untuk kemudian dilakukan analisis diskriminan untuk melihat ketepatan klasifikasi yang dihasilkan. Hasil dari analisis yang dilakukan menunjukkan bahwa dari 4 kelompok benua yang dilakukan proses klasifikasi menunjukkan bahwa 3 benua telah memiliki ketepatan klasifikasi sebesar 100% sedangkan satu benua sebesar 92,1%. Namun apabila diinginkan ketepatan klasifikasi yang lebih baik dapat dilakukan metode analisis yang lebih advance.

Optimasi Multi Response Surface pada Industri Kemasan Botol Plastik dengan Pendekatan Fuzzy Programming Lela Devi Meylina; Sony Sunaryo
Jurnal Sains dan Seni ITS Vol 3, No 2 (2014)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat (LPPM), ITS

Kemasan plastik banyak digemari konsumen dan mulai menggeser kemasan lain seperti kemasan gelas dan kertas. Meskipun demikian, konsumsi plastik di Indonesia masih tergolong rendah. Kurangnya konsumsi plastik di Indonesia diindikasikan akibat kurang baiknya kualitas kemasan plastik yang dihasilkan pabrik-pabrik di Indonesia. PT. AAM merupakan salah satu perusahaan yang bergerak di bidang industri kemasan botol plastik. Salah satu produk kemasan plastik yang dihasilkan adalah botol Chamomile 60 ml. Dalam pembuatan produk tersebut terdapat 2 karakteristik kualitas yang penting untuk diperhatikan yaitu volume isi botol dan diameter mulut dalam botol. Selain itu dalam memproduksi produk Chamo-mile 60 ml, hal yang perlu diperhatikan adalah bagai-mana setting parameter temperatur barrel, blowing time, dan blowing pressure untuk memperoleh volume isi botol dan diameter mulut dalam botol yang optimum.

ANALISIS KEPUASAN NASABAH DENGAN METODA SER VQUAL GUNA MENINGKATKAN KUALITAS PELAYANAN PERBANKAN DI PT BANK XYZ Tbk. KANTOR CABANG KEDIRI Andjik Setyo Widodo; Bobby Oedy P. Soepangkat; Sony Sunaryo
Jurnal Teknobisnis Vol 2, No 1 (2006): Jurnal TEKNOBISNIS
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat- Institut Teknologi Sepuluh Nopember

Globalization and technological advancement and the resulting high market competitiveness is giving prominence to the issue of the quality of customer service in the service industry sector, leaving practitioners in the sector with no choice but to properly address the issue in order to be competitive. Consequently, assessing customer service quality in the financial service industry such as bank is vital in determining the standard expected of the industry. PT Bank XYZ (Persero) Tbk companie is no exception to this requirement. The purpose of this paper is to examine the level of service quality and customer satisfaction in bank.. The results of this investigation revealed that the service quality of PT Bank XYZ (Persero) Tbk branch of Kediri were unsatisfactory. The results also indicated that customers of bank companies rated. In terms of customer satisfaction, the result revealed that customers of PT Bank XYZ (Persero) Tbk branch of Kediri were not satisfied with the service of these banks. Implications and suggestions for further research are proposed.

ANALISIS KUALITAS LAYANAN DAN KEPUASAN PELANGGAN DI BENGKEL TOYOTA-A2K Jimmy Irawan; Bobby Oedy P. Soepangkat; Sony Sunaryo
Jurnal Teknobisnis Vol 2, No 1 (2006): Jurnal TEKNOBISNIS
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat- Institut Teknologi Sepuluh Nopember

Toyota-A2K auto repair shop, which serves as the center of Toyota authorized after sales service has a mission to support the new cars selling activities by way of providing car treatment and repair services. The service quality within the auto repair shop is ought to be preserved so that the gaps between customers ' perception and expectation can be avoided. The lower the customers ' perception toward the sen•'ice quality than their expectation leads to the customers' dissatisfaction, which then resulted the decrease of customer retention within the overall business cycle. This research designed to measure the customers ' satisfaction level of service quality in Toyota-A2K auto repair shop all the way through five dimensions of service quality; that are tangibles, reliability, responsiveness, assurance, and empathy. The level of customers' satisfaction measured by way of analyzing gap score between customers ' perception and expectation within those five dimensions of service quality.

PENERAPAN METODA SER VQUAL DALAM MENINGKATKAN KUALITAS PELAYANAN KIRIMAN EKSPRES DI PT BIROTIKA SEMESTA/DHL David N. Kaban; Bobby Oedy P. Soepangkat; Sony Sunaryo
Jurnal Teknobisnis Vol 2, No 1 (2006): Jurnal TEKNOBISNIS
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat- Institut Teknologi Sepuluh Nopember

PT Birotika Semesta/DHL is a courier express company which focuses on international shipment. Very tight competition in parcel delivery industry has forced DHL as a market leader to keep innovating and evaluating their services to the customers. A service that has to be delivered to the customers sometimes does not fulfill their expectation. The courier company itself sometimes has a different perception between services that they have delivered to the customers and customer's expectation of the courier services. This research was designed to measure the customer's satisfaction level using Servqual method Specifically, gap l, between management's perception and customer's expectation, and gap 5, gap between expectation and perception of the customers, were measured. Measurement was done through five dimensions of Servqual, which comprised tangiblity, reliability, responsiveness, assurance, and empathy. The result of this research showed that DHL 's customers could be classified into three clusters according to their level of satisfaction. These clusters comprised customers of whose satisfaction levels were: slightly below their expectation, slightly above their expectation, and far below their expectation. Gap 5 analysis on cluster 1 and 2 resulted in the biggest gap was reliability, and that on cluster 3, the biggest gap was responsiveness. Analysis Gap 1 on cluster 1 and 3 resulted in the biggest gap was responsiveness, and there is no gap on cluster 2. Our suggestion was to focus on responsiveness since this dimension has the biggest gap of all

ANALISA FAKTOR-FAKTOR YANG MEMPENGARUHI KEPUASAN KARYAWAN TERHADAP LINGKUP KERJANYA DAN KEPUASAN TAMU HOTEL XYZ Siska Ayu Kartika; Bobby Oedy P Soepangkat; Sony Sunaryo
Jurnal Teknobisnis Vol 1, No 1 (2005): Jurnal TEKNOBISNIS
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat- Institut Teknologi Sepuluh Nopember

XYZ Hotel is a three stars hotel, which currently faces a problem with declining occupancy room and growth of total guest. These will become worse, if XYZ Hotel can not provide the best service as guest expectation. The ability of employee to provide service is influenced by employee’s satisfaction to their work scope which consists of character ambiguity, character conflict, competency conformity to employee’s work, technology conformity to employee’s work, control perception, control system and team work. On the other side, customer satisfaction is also influenced by service quality variables, such as tangible, reliability, responsibility, assurance and empathy.This research was done by distributing questionnaire using SERVQUAL Method (Parasuraman, et al. 1990), and only measure gap 3 and 5, using Likert scale. The result showed that factor which influenced employees satisfaction was control system. And the most important factor that influences customer satisfaction was assurance. Both of these important factor had to be a first improvement priority for management to reach customer satisfaction. Finally, based on this research, we learned that there was no significant correlation between employee and customer satisfaction in the XYZ Hotel.

Co-Authors Andjik Setyo Widodo Bobby Oedy P Soepangkat Bobby Oedy P. Soepangkat David N. Kaban Jalu Handoko Jimmy Irawan Lela Devi Meylina Setiawan Setiawan Siska Ayu Kartika Tiodora Hadumaon Siagian

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