Search

Rotary friction welding (RFW) result is much affected by heating and joining stage parameters. Heating stage is the period where friction takes place to generate heat at the interface. Parameters that alter the heating are friction pressure, friction time and rotation speed. In this work, experiment of RFW AISI 1045 and AISI 304 under different friction pressure and friction time was carried out. The objective was to investigate the relation between those parameters with the welding strength. The experiments were performed using one-factor-at-a-time (OFAT) strategy. A polynomial model of relation between joint strength with friction pressure and friction time was developed. Welding efficiency of 81.7% from the AISI 304 base metal was attained. Optimum setting friction pressure of under constant friction time was 40 bar, whereas the optimum setting friction time under constant friction pressure was 5 seconds.

Kombucha coffee is a fermented coffee bean, which is extracted using a combination of bacteria and yeast. Kombucha coffee can be obtained by optimizing the three variables, namely sugar concentration, incubation temperature and duration of fermentation using a response surface methodology (RSM). This study aimed to optimize the three variables that influence the fermentation of Robusta green coffee beans using a kombucha culture to obtain low caffeine content and high levels of chlorogenic acid. RSM calculation was used high-performance liquid chromatography (HPLC) on caffeine and chlorogenic acid that content in kombucha coffee. The results of modeling used a central composite experimental design (CCD). The results of the optimization study showed that the lowest concentration of caffeine and chlorogenic acid was obtained at sugar concentration of 6.77% (b/v), incubation temperature of 25°C and incubation for 18 days. Finally, the fermentation using RSM on kombucha coffee required an additional variable which is the amount of kombucha culture inoculums, as well as the variables of sugar concentration, incubation temperature and duration of fermentation. Key words: Kombucha coffee; caffeine; chlorogenic acid.

None of the research found in the literature investigates and optimizes the subtractive rapid prototyping process parameters in order to fabricate polycarbonate material. This research is conducted to optimize the subtractive rapid prototyping process parameters of polycarbonate material in order to achieve the maximum material rate removal without exceeding the dimensional error value of 1 mm, similar to the result of additive manufacturing. The response surface methodology is implemented in this research to optimized three process parameters, which are feed rate, step-over, and depth of cut. Two responses investigated in this research are material rate removal and dimensional error. The response optimizer is used to optimize the responses. The result shows that optimum material removal rate and dimensional error that can be achieved is 2.494 mm3/s and 0.97 mm respectively. A confirmation test experiment has been conducted to verify the optimization result.

UKM Dede Satoe di Surabaya menghadapi setidaknya empat permasalahan utama, yaitu proses pengolahan yang belum memenuhi standar keamanan pangan internasional, atribut dan desain kemasan yang belum sesuai standar internasional, terbatasnya sarana pemasaran, dan terbatasnya pemahaman tentang manajemen bisnis yang membuatnya kalah bersaing dengan pabrikan. Oleh sebab itu, selama tiga tahun (2018-2020) dilaksanakan program pendampingan yang bersifat holistik yang meliputi: pendampingan dan pelatihan standardisasi keamanan pangan sesuai standar pangan internasional, perbaikan atribut dan desain kemasan produk, pembekalan manajemen bisnis khusunya keuangan, serta pendampingan penggunaan berbagai media baik online maupun offline untuk memperluas sarana pemasaran. Tujuan dilaksanakannya program ini adalah untuk meningkatkan daya saing UKM sehingga target dan pangsa pasarnya menjadi lebih luas dan bersaing di pasar global. Hasilnya, di akhir tahun 2020, produk mitra telah tersertifikasi keamanan pangan internasional (HACCP), produk telah memiliki desain kemasan ekonomis dengan atribut sesuai standar internasional, UKM mampu menyajikan laporan keuangan dan menggunakannya untuk berbagai macam pengambilan keputusan, dan adanya peningkatan signifikan transaksi penjualan online dan ekspor.

— XYZ Group has been expanding their bussiness in various sector i.e., retail, IT consultants, food & beverages, shopping plazas, Japanese restaurants, e-wallets, e-commerce, and expeditions. XYZ Group continues to expand as an action to survive and win the competition. Therefore, XYZ Group’s Recruitment Division plays an important role in business activities. The Human Resource Scorecard is an appropriate method for measuring performance in XYZ Group's recruitment division. The result of Human Resource Scorecard in the XYZ Group Recruitment Division are acquiring 17 Key Performance Indicators (KPI) consisting of financial perspective two KPIs, three customer perspective KPIs, eight operational perspective KPIs, and four strategic perspective KPIs. Performance measurement is carried out by weighting process, followed by performance measurement based on the required data. The measurement results show an overall performance of XYZ’s Recruitment Division is 3,534, which means the performance of the XYZ Group’s Recruitment Division is good. Financial perspective performance gets a value of 2.5 (good enough), customer perspective performance gets a value of 3,831 (good), operational perspective performance gets a value of 3,423 (good), and strategic perspective performance gets a value of 4 (good). Based on the KPI that didn’t reach the target, an action plan was made. In addition to the action plan, performance dashboard and analysis of cause and effect relationships after measurement have been made. Keywords: human resource scorecard, key performance indicator, performance dashboard Abstrak— XYZ Group telah melakukan ekspansi di berbagai bidang, yaitu retail, grocery, IT consultant, food & beverages, shopping plaza, Japanese restaurant, e-wallet, e-commerce, dan ekspedisi. XYZ Group terus melakukan ekspansi sebagai tindakan untuk bertahan dan memenangkan persaingan. Oleh karena itu, Divisi Rekrutmen XYZ Group memegang peranan penting dalam aktivitas bisnis. Human Resource Scorecard menjadi metode yang sesuai untuk melakukan pengukuran kinerja pada divisi rekrutmen XYZ Group. Perancangan Human Resource Scorecard pada Divisi Rekrutmen XYZ Group menghasilkan 17 Key Performance Indicator (KPI), yaitu dua KPI perspektif financial, tiga KPI perspektif customer, delapan KPI perspektif operational, dan empat KPI perspektif strategic. Pengukuran kinerja dilakukan dengan melakukan pembobotan dilanjutkan pengukuran kinerja berdasarkan data yang diperlukan. Hasil pengukuran menunjukkan kinerja keseluruhan sebesar 3,534 yang berarti kinerja Divisi Rekrutmen XYZ Group tergolong baik. Kinerja perspektif financial mendapatkan nilai sebesar 2,5 (cukup baik), kinerja perspektf customer sebesar 3,831 (baik), kinerja perspektif operational sebesar 3,423 (baik), dan kinerja perspektif strategic sebesar 4 (baik). Berdasarkan KPI yang tidak mencapai target dibuat action plan. Selain action plan, dilakukan perncangan performance dashboard dan analisis cause and effect relationship setelah pengukuran. Kata kunci: human resource scorecard, key performance indicator, performance dashboard

In this study, an environmentally friendly extraction method for flavonoid compound from Ixora javanica , as a new raw material candidate for herbal medicine and cosmetics, was developed. The objectives of the present work were to provide recommendations for the optimal extraction conditions and to investigate the effects of any extraction parameters on flavonoid yields from the I. javanica flower. The extraction process was performed using deep eutectic solvent (DES) (choline chloride and propylene glycol at molar ratio of 1 : 1) and the ultrasound-assisted extraction method. Both single-factor and response surface analyses using three-level and three-factor Box Behnken designs were conducted to obtain the optimum flavonoid concentrations. The results showed that the optimum extraction conditions for total flavonoids featured an extraction time of 40 min, 25% water content in DES and a solid-to-liquid ratio of 1 : 25 g ml −1 . An extract obtained under optimum extraction conditions showed higher total flavonoid yields than an ethanolic extract which was used for comparison. Scanning electron microscope images demonstrated that both of the solvents also showed different effects on the outer surface of the I. javanica flower during the extraction process. In summary, our work succeeded in determining the optimum conditions for total flavonoids in the I. javanica flower using a green extraction method.

Usaha Mikro Kecil dan Menengah harus memiliki daya saing supaya tetap bertahan, meski persaingan usaha saat ini semakin ketat. Salah satu aspek untuk meningkatkan daya saing adalah media pemasaran yang tepat yang menggabungkan antara media pemasaran offline (konvensional) dan online. Media pemasaran yang dimiliki oleh Usaha Mikro Kecil Menengah DEDE SATOE sebelumnya masih konvensional yaitu dilakukan secara offline, sehingga pertumbuhan pasarnya juga sangat lambat. Tim Program Pengembangan Produk Unggulan Daerah betujuan membantu DEDE SATOE melengkapi media promosinya dengan media promosi online untuk memperluas pangsa pasar serta mempercepat pertumbuhannya. Tahap yang dilakukan adalah analisis platform e-commerce, pendaftaran, pelatihan dan pendampingan penggunaan platform e-commerce, serta dilakukan pemantauan dan rekapitulasi hasil penjualan melalui platform e-commerce tersebut. Hasil yang diperoleh adalah jumlah transaksi dan jumlah produk yang terjual di 5 platform online yaitu Tokopedia, Bukalapak, Shopee, Lazada dan Blibli mengalami peningkatan signifikan dari periode Juli-Desember 2019 ke Januari-Mei 2020. Di masa datang UMKM harus lebih fokus untuk mengelola penjualan melalui platform e-commerce supaya lebih optimal.Keyword: media pemasaran; platform e-commerce; promosi; Usaha Mikro Kecil dan Menengah

Every learning activity should be well designed so that it can be easily understood and can attract the attention. However, challenges will arise for quantitative courses such as quality engineering (QE). The QE course is quantitative course in industrial engineering aimed for engineering system to produce qualified product. This paper will discuss about role playing as learning method for quality engineering courses. Role playing is designed by considering students as a part of Research and Development (R&D) department from Food Company trying to improve quality of products. Role playing is fully conducted for one semester with integrated activities consisting of teaching, R&D Meeting, market survey, experimentation and presentation. To build atmosphere, the course’s materials are delivered like training. Pudding experiment was chosen to help students to understand types of DoE particularly. In addition, student gets the role of R&D such as leaders, surveyors to conduct market research, analysts to determine Critical to Quality which is worth to be controlled. Thus, learning process is conducted with experiential learning method. By using this method, the central tendencies of mark are 77,5 for mean, 78 for median and 84 for mode. Thus, we can draw that students can easily achieve Learning Objectives in a fascinating way.

Customer loyalty becomes considerations by service providers to maintain for reducing the churn rate. Many studies propose factors that are significantly influencing customer loyalty, and apply them for predicting it. Based on mathematical models, loyalty prediction methods are developed, and it involves new approaches including machine learning. This research aim is predicting customer loyalty using the combination of structural equation model (SEM) and artificial neural networks (ANN). The methodology starts by applying SEM for selecting statistically significant factors affect the loyalty. The linear SEM model ensures this relationship by fulfilling statistical hypothesis and fulfilled assumptions. Once selected factors are found, they are treated as inputs for ANN modelling. ANN is selected because of its ability in nonlinear modelling to enhance its prediction. ANN then learns the relationship between those inputs and the loyalty in real time as any additional observation recorded in. Based on trained ANN, prediction of customer loyalty based on input factors could be done. A case study was conducted at a Hotel by asking 130 customers. SEM inputs includes tangibles, facility, and staff attitudes, while loyalty scores become output. Combination of SEM-ANN has successfully predicted the customer loyalty and brought up chances for improvement strategies.

Quality and reliability engineering technique are widely used as improvement tools in manufacturing industries, involving the design experiments, quality function deployment (QFD), and survival analysis, focuses on improving the lifecycle of products. However, started at early last decade, some researches in improving the service lifecycle in some service industry consider to implements design of experiment in service industry, followed by other tools such as QFD, and the reliability engineering tools. This research proposed alternatives incorporated quality and reliability engineering methods in evaluating and improving the lifecycle of service. Starting with evaluating the weaknesses of service using SERVQUAL method, finding the improvement plan by implementing QFD, designing the robust service design using Taguchi designed experiment methods, and then implementing survival analysis for ensuring the reliability of designed services. This framework has successfully implemented in designing and evaluating existing airport service system with some recommendation generated in.

Most customer satisfaction surveys are conducted periodically to track their dynamics. One of the goals of this survey was to evaluate the service design by recognizing the trend of satisfaction score. Many researchers recommended in redesigning the service when the satisfaction scores were decreasing, so that the service life cycle could be predicted qualitatively. However, these scores were usually set in Likert scale and had quantitative properties. Thus, they should also be analyzed in quantitative model so that the predicted service life cycle would be done by applying the survival analysis. This paper discussed a starting point for customer satisfaction survival analysis with a case study in healthcare service.