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"Invetory control is one of important thing in company, inventory is expensive asset, usually abount 40% of the total investment. This study is to obtain a model MRO inventory in effort to decrease total cost of inventory using Min-Max system with Croston and Single Exponential Smoothing foscase methods. Croston forecasting method intended for lumpy demand pattern, while Single Exponential Smoothing is for a regular demand pattern. The result of this study is the number of economic order quantity, reoder point quantity (ROP), safety stock, and maximum level stock. For the example, 15 items, obtained increasement in average service level from 93% to 96%.;Invetory control is one of important thing in company, inventory is expensive asset, usually abount 40% of the total investment. This study is to obtain a model MRO inventory in effort to decrease total cost of inventory using Min-Max system with Croston and Single Exponential Smoothing foscase methods. Croston forecasting method intended for lumpy demand pattern, while Single Exponential Smoothing is for a regular demand pattern. The result of this study is the number of economic order quantity, reoder point quantity (ROP), safety stock, and maximum level stock. For the example, 15 items, obtained increasement in average service level from 93% to 96%."

"Pengambilan keputusan adalah suatu metoda pencarian multi alternatif solusi yang setiapnya merupakan gagasan yang memberikan pengaruh atau hubungan yang menguatkan. Metoda ini dikelompokkan dalam Multi Criteria Decision Making (MCDM) yang terdiri dari metoda pengolahan data kualitatif dan metoda pengolahan data kuantitatif, bahkan pengolahan ini dapat menggabungkan keduanya dengan hasil data kualitatif sebagai penegasan cara pandang untuk data kuantitatif. Dalam pengambilan keputusan multi solusi, pengolahan data kualitatif dengan metoda analytic Hierarchy Process (AHP) yang diambil berdasarkan perspektif responden ini menghasilkan nilai hirarki sebagai penegasan data atribut. Untuk pengolahan data kuantitatif dilakukan dengan metoda Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) yang data atributnya telah dipengaruhi perpektif responden. Sehingga objektif yang dihasilkan merupakan proses menentukan solusi terbaik dan terpercaya sesuai menurut pembuktian criteria. Pada manufaktur konstruksi baja penggunaan bahan baku dikontrol untuk meningkatkan efisiensi dan menurunkan sisa bahan. Data yang menunjukkan sisa bahan merupakan permasalahan awal dari efisiensi material sehingga dilakukan pengelola multi criteria decision making untuk permasalahan ini. Metoda ini diterapkan pada konstruksi baja, diperoleh langkah perubahan rancangan, proses pemotongan, pengelasan dan testing dimana diperoleh penurunan material sisa sebesar 26.2% dari rancangan sebelumnya. Perubahan yang dilakukan tanpa menurunkan kualitas dan kekuatan konstruksi.

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Decision making is a multi search for alternative methods of solution each with an idea that gives influence or strengthens relationships. These methods are grouped in Multi-Criteria Decision Making (MCDM) of processing methods of qualitative data and quantitative methods of data processing, this processing can even combine them with the results of the qualitative data as a confirmation of the perspective or perception to quantitative data. In a multi-solution decision-making, processing of qualitative data with analytic Hierarchy Process (AHP) method is taken based on respondents' perspective this result as confirmation of the value hierarchy attribute data. For quantitative data processing is done by a method Technique for Order Preference by similarity to Ideal Solution (TOPSIS), which attributes have influenced the data perspective of respondents. So that the resulting objective is to determine the best and reliable solution in accordance according to criteria of evidence. In the manufacture of metal construction materials using controlled to improve efficiency and reduce the residual material. Data showing residual material is the beginning of the efficiency problems that made the management of material multi criteria decision making for this problem. This method is applied to metal construction, obtained by step changes in the design, the process of cutting, welding and testing where the residual material obtained decrease of 26.2% from the previous design. Changes made without lowering the quality and strength of construction."

"Pengembangan energi terbarukan yang cukup potesial di Indonesia adalah pengembangan biofuel, yaitu energi yang berasal dari biomassa menjadi biodiesel dan bioetanol. Bioetanol berbahan baku bagas, berasal dari residu padat industri tebu, dilakukan dengan teknologi bioproses dengan pendekatan enzimatik dan sistem Simultaneous Sacharification and Fermentation (SSF), serta perlakuan awal bagas dengan bantuan pembibitan jamur tiram. Penelitian ini betujuan untuk memperoleh suatu kelayakan investasi dari produksi bioetanol berbahan baku bagas dengan metode tekno ekonomi, menggunakan metode Net Present Value (NPV), Internal Rate of Return (IRR), dan Payback Period (PBP).Analisis tekno-ekonomi produksi bioetanol berbahan baku bagas dengan kapasitas produksi sebesar 170 liter per hari dengan harga jual sebesar Rp.10.000 per liter dilakukan pada dua skenario. Skenario pertama, produksi bioetanol dan perlakuan awal bagas dengan jamur dilakukan oleh satu pihak, diperoleh NPV negatif sebesar Rp. 39.817.179.569,10. Sedangkan untuk skenario dua, produksi bioetanol dan perlakuan awal bagas dengan jamur dilakukan oleh dua pihak yang berbeda, diperoleh NPV negatif sebesar Rp. 59.449.434.727,52. Dengan demikian, produksi bioetanol berbahan baku bagas dengan kapasitas produksi sebesar 170 liter per hari dengan harga jual sebesar Rp.10.000 per liter adalah tidak layak untuk dilakukan.Dari hasil analisis diatas, dilakukan analisis sensitivitas pada skenario pertama, mengingat NPV yang diperoleh skenario pertama lebih besar dibandingkan dengan skenario kedua. Analisis sensitivitas dilakukan terhadap penurunan harga enzim, penurunan harga listik, serta peningkatan harga jual etanol yang dihasilkan. Penurunan yang dilakukan terhadap harga enzim, harga listrik dan peningkatan terhadap harga jual, maka produksi bioetanol berbahan baku bagas dengan kapasitas produksi sebesar 170 liter per hari adalah layak untuk di lakukan dengan harga jual sebesar Rp. 16.500 per liter, harga listrik sebesar Rp. 200 per kwh, dan harga enzim sebesar Rp. 6.300 per liter, diperoleh NPV sebesar Rp.491.670.277,53, IRR sebesar 11% dan PBP pada tahun ke duabelas investasi.

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The development of potential renewable energy in Indonesia would be the development of biofuel, the energy that is produced from the process of biomass into biodiesel and also bioethanol. Bioethanol which are made from raw bagasse, comes from the solid residue of sugar cane industries, are processed with the technology of bioprocess through enzymatic and Sacharification and Simultaneous Fermentation (SSF) approach, and also pretreatment of bagasse with the help of oyster mushroom breeding. The purpose of this research is meant to acquire feasibility of an investation in the production of bioethanol from bagasse with the method of techno economics, using Net Present Value (NPV), Internal Rate of Return (IRR) and Payback Period (PBP).Techno-economic analysis carried out on two scenarios. The first scenario, the production of bioethanol and pretreatment of bagasse with fungi carried by one hand, the result is a negative NPV of Rp. 39.817.179.569,10. While for the second scenario, the production of bioethanol and pretreatment of bagasse with fungi carried by two different parties, the result is negative NPV of Rp.59.449.434.727,52. Thus, the production of bioethanol made from bagasse with a production capacity of 170 liters per day for a price of IDR 10,000 per liter is not feasible to be done.From the analysis result mantioned above, it had been performed sensitivity analysis on the first scenario by considering that the NPV obtained in the first scenario was greater than the second scenario. The sensitivity analysis is conducted towards the decreasing of enzyms and electricity prices and also towards the increasing in ethanol selling price, that are produced. The decreasing of prices towards enzyms and electricity prices and also the increasing of ethanol selling price resulted that the production of bagasse based bioethanol with the production capasity of 170 liter per day is feasible to be conducted with the ethanol selling price of IDR 16.500 per liter, electricity price of IDR 200 per KWH and enzym price of IDR 6.300 per liter would generate an NPV of IDR 491.670.277, 53, IRR of 11%, and PBP on the twelfth year of investment."

"Tesis ini membahas pengukuran kinerja perusahaan jasa penerbangan di Indonesia dengan menggunakan metode Performance Prism. Penelitian ini tidak hanya mengukur kinerja dari sisi strategi saja tetapi juga memperhatikan kepuasan dan kontribusi stakeholder, proses dan kapabilitas perusahaan. Penelitian ini juga mengidentifikasi stakeholder dari banyak pihak yang berkepentingan, seperti pelanggan, manajemen, pegawai dan pemasok. Pengolahan data dilakukan dengan Model Analisis Kuantitatif TEV diantaranya pembobotan dengan Delphi Method dan penilaian kinerja dengan Expected Value. Hasil dari penelitian ini bahwa penilaian kinerja perusahaan dikategorikan baik berdasarkan skala 5 dengan nilai kinerja 3.9669. Dari 22 Indikator yang diukur, ada 10 indikator yang dikategorikan sangat baik, 6 indikator dikategorikan baik, 5 indikator dikategorikan cukup, dan 1 indikator dikategorikan sangat kurang.

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This thesis describes the measurement of performance at aviation services company in Indonesia using the Performance Prism. This study not only measures performance in terms of strategy but also to attention to customer satisfaction and contribution of stakeholders, processes and company capabilities. This study also identifies stakeholders from many interested parties, such as customers, management, employees and suppliers. Data processing was performed with TEV Quantitative Analysis Model that is weighted with Delphi Method and the Expected Value of performance assessment.

Results from this study that the assessment of corporate performance are categorized on a scale of five with a good performance value 3.9669. Of the 22 indicators measured, there are 10 indicators that are categorized very well, six indicators of well categorized, five indicators of enough categorized, and an indicator is considered very low."

"Persediaan suatu komponen pada gudang dalam suatu perusahaan yang menangani transportasi sangat diperlukan. Hal tersebut mengharuskan perusahaan melakukan suatu metode pengotrolan dalam segala bidang agar dapat memenuhi setiap terjadi penggantian komponen. Salah satu cara yang harus ditempuh adalah dengan mengoptimalkan sistem persediaan komponen. Metode yang sesuai untuk system persediaan spare parts pada penelitian ini menggunakan fixed time period with safety stock. Dari hasil pengalahan data menggunakan metode tersebut terbukti dapat menurunkan tingkat persediaan ke titik yang optimal yang berdampak ke penurunan inventory cost. Total saving cost yang diperoleh dari 12 periode penelitian adalah sebesar Rp 96.035.916,00.

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It is so needed the stock of the components in the warehouse in a transportation company. The company requires to applying a specific control method in all areas in order to comply every replacement of components. One of the methods is optimizing the supply system components. In this study, the compatible method for the system of spare parts stock is using a determined time period with safety stock.

Based on the data of the research, this method effectively reduces the stock level to the optimum point that impacts to the decrease of the stock cost. In 12 periods of study, the obtained total saving costs are Rp 96.035.916,00."

"Besarnya kebutuhan akan kemasan kayu dalam kegiatan perdagangan menuntut produsen kemasan kayu untuk mengembangkan sistem penjadwalan produksi yang optimal agar dapat memenuhi permintaan pasar. Penelitian ini membahas optimasi penjadwalan produksi kemasan kayu, khususnya pallet, dengan system job shop melalui penerapan algoritma Differential Evolution. Prinsip algoritma DE sesuai dengan analogi evolusi biologi yang terdiri dari proses inisialisasi populasi, proses mutasi, proses pindah silang, dan proses seleksi. Tujuan dari penelitian ini adalah untuk meminimumkan total biaya (dalam satutan waktu) yang timbul sebagai akibat dari keterlambatan dalam proses produksi kemasan kayu, khususnya pallet yang dipergunakan untuk mengemas barang-barang ekspor. Penelitian dilakukan melalui studi kasus dengan mengamati proses produksi pallet pada suatu produsen pallet. Hasil dari penelitian ini adalah diperolehnya usulan penjadwalan produksi dengan penurunan total biaya keterlambatan sebesar 25,22%, (dari 23590 menit menjadi 17640 menit) serta penurunan pada kriteria lainnya seperti jumlah pesanan yang terlambat, total waktu keterlambatan, dan waktu penyelesaian. Simulasi penambahan kapasitas menunjukkan bahwa penambahan jumlah mesin pada stasiun serut dan potong dapat menghilangkan keterlambatan dan meningkatkan output hingga 95%.

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The ever increasing need of wooden packaging , whether for international as well as inter-islands transportation of traded goods, has required the producers of wooden packaging to develop an optimized production scheduling system to fulfill the market demand. This research studies the optimization of the job shop production scheduling system of wooden packaging, particularly pallet, through the application of the Differential Evolution (DE) algorithm. The principles of the DE algorithm is in line with the biological evolution analogy which consists of the initialization of population, mutation, crossover, and selection processes. The DE algorithm has some excellent features namely the concept is simple, easy to apply, quick in producing solutions, and robust. The objektif of this research is to minimize the total cost (in time unit) resulting from the delay in the production process of wooden packaging, particularly pallet.

This research is a case-study which is carried-out by observing pallet production process at a wooden packaging manufacturer. The company produces wood packaging, mainly pallet, which are used for the packaging of exported goods. This research leads to a recommendation on the wooden packaging production schedule with more efficient cost. The total cost resulting from the delay in the production is reduced by 25,22% (from 23590 minutes to 17640 minutes). There are also reductions in the total of tardy job, total of tardiness, and makespan. A simulation of work station capacity upgrade also shows that the addition of the number of machineries in planing and sawing station will eliminate delay and increase output up to 95%."

"Penelitian dilakukan dengan dilatarbelakangi pentingnya optimasi pada pembelian bahan baku di perusahaan manufaktur. Optimasi dilakukan untuk menentukan kepada siapa bahan baku dibeli dan berapa kuantitas pembelian yang sesuai. Melalui Analytic Network Process (ANP) diperoleh bobot kriteria penilaian performa supplier dan nilai supplier untuk tiap kriteria. Output dari ANP dimodelkan dalam Goal Programming untuk diketahui kuantitas pembelian bahan baku pada setiap supplier. Dari hasil penelitian, terdapat 8 kriteria untuk menilai performa supplier; harga, kualitas, delivery, after sale service, fleksibilitas, pengemasan, kemampuan menjaga hubungan, serta fasilitas dan kapasitas produksi. Alokasi pembelian untuk kelima jenis bahan baku sebagian besar dilakukan pada satu supplier.

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This research was conducted with the importance of optimization in raw material purchasing as its background. Optimization was done in determination of whom the material should be purchased, and in what quantity. Using Analytic Network Process (ANP) the weight of each criteria to score suppliers performance and the suppliers score were obtained. The output from ANP was modeled into Goal Programming to obtain the quantity of material that should be purchased from each supplier. There are 8 criteria to score suppliers performance; price, quality, delivery, after sale service, flexibility, packaging, ability to maintain relationship, and facility and capacity of production. Allocation to purchase 5 kinds of material was mostly done in one supplier."

"Loyalitas pelanggan memiliki peranan yang besar bagi perusahaan untuk meningkatkan pasar bisnisnya karena pelanggan yang loyal memberikan dampak yang positif berupa peningkatan profit dan daya saing perusahaan, pujian yang positif pada produk, dan sebagai entry barrier terhadap para pesaing. Oleh karena itu, maskapai nasional sebagai bagian dari industri penerbangan yang terus meningkat ini perlu melakukan analisis mengenai loyalitas pelanggannya. Penelitian ini bertujuan untuk mengetahui karakteristik pelanggan dari salah satu maskapai swasta di Indonesia yang mempengaruhi tingkat loyalitasnya dengan metode data mining, dimana algoritma yang digunakan adalah C5.0. Hasil yang didapatkan pada penelitian ini berupa model pohon keputusan.yang berisikan klasifikasi pelanggan Lion Air berdasarkan tingkat loyalitasnya.

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Customer loyalty has a important role for company in increasing its business market because loyal customers gives positive impacts, such as increasing company's profit and competence skill, positive complement about its product, and applicable to be used as an entry barrier within the competitors. In due to that condition, national airline, as one of the airline industry's components that improve in recent years, needs to do analysis research concerned on its own customer loyalty. This research aims to discover the customers' characteristic from an airline in Indonesia that influences their loyality level by using data mining, while the used algorithm is C5.0. A result obtained in this study is a decision tree model that contains a classification of Lion Air's customers based on their loyalty level. "

"Studi pengaruh komposisi sarapan terhadap performa kognitif dan fisik dilakukan pada siswa/i SMP/SMA Negeri Khusus Olahragawan Ragunan yang terdiri dari 16 atlet renang dan 16 atlet senam. Tiga kombinasi sarapan yangdiberikan dibedakan berdasarkan nilai kkal, yaitu nasi, sereal, dan tidak sarapan. Performa kognitif diukur dengan melihat hasil tes kognitif yang sudah dirancang, sedangkan performa fisik dilihat dari nilai VO2 Max dan nilai critical swim speed untuk atlet renang. Hasil pengukuran diolah berdasarkan tiga jenis faktor, yaitu jenis sarapan, jenis kelamin, dan jenis olahraga.Hasil analisis menunjukkan bahwa Nasi dengan nilai kkal paling tinggi memberikan dampak paling baik dibandingkan kedua menu lainnya.

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The study of the effect of breakfast composition on cognitive and physical performance done at Junior and Senior High School for Athletes Ragunan consisting of 16 swimming athletes and 16 gymnastics athletes. Three combination breakfast given by the kcal value, namely rice, cereals, and no breakfast. Cognitive performance was measured by looking at the results of cognitive tests that have been designed, while physical performance seen from the VO2 Max and the critical swim speed value for the swimming athletes. The measurement results processed by three types of factors, the type of breakfast, sex, and type of sport. The analysis showed that rice with the highest kcal best impact than the other menus."

"Penelitian ini dilakukan untuk mengetahui kualitas layanan transjakarta busway dan melihat apakah ada kesenjangan antara persepsi dan harapan penumpang. Penelitian dilakukan dengan metode SERVQUAL yang didasarkan atas kesenjangan antara persepsi dan ekspektasi kualitas pelayanan yang diterima penumpang. Fokus penelitian ini ialah pada lima dimensi utama dalam SERVQUAL yaitu; Tangible, Assurance, Responsiveness, Empathy dan reliability. Penelitian ini menggunakan kuesioner dan melibatkan 140 responden sebagai sampel penelitian. Penelitian ini dilakukan pada halte transjakarta koridor enam (ragunan-kuningan) Jakarta. Hasilnya nilai ekspektasi penumpang transjakarta sebesar 3,548. Nilai persepsi sebesar 2,498. SERVQUAL Score nya ialah -1,462. Weighted SERVQUAL Score sebesar -2,794 dan nilai Actual SERVQUAL Scorenya sebesar 70.16%.

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This study aims to identify the service quality of Transjakarta Busway and verify if there is any gap between perception and expectation of customers. The study is performed using SERVQUAL method based on the gap between perception and expectation of service quality. It focuses on five main dimensions in SERVQUAL which are: Tangible, Assurance, Responsiveness, Empathy and Reliability. It uses questionnaire with 140 respondents as sample. It takes place at shelters of Transjakarta koridor VI. The findings of the study is as following: value of customers' expetation is 3,548; value of customers' perception is 2,498; SERVQUAL score is -1,462; weighted SERVQUAL score is -2,974; Actual SERVQUAL score is 70.16%."