Judul: Evaluasi Sistem Traceability pada Produksi Chewy Candy di PT Sweet Candy Indonesia Menggunakan FMECA (Failure Mode Effects and Criticality Analysis)
Abstrak: The low level of effectiveness and efficiency in traceability system implemented by an industry will conduce bad management of product quality assurance. Therefore, traceability system is necessary to be evaluated using FMECA (Failure Mode Effects and Criticality Analysis) method and arrangement of several mock recalls. Base on FMECA analysis, errors like no documentation of BTP batch number by the flavor room and production; no candy calculation in cut and wrap; damage or disappearance of checklist intermediate form (in transwrap); and no documentation of scrap separately by the incinerator are categorized in unacceptable area which have prefered priority in corrective action compared with errors of candy’s variety and batch number documentation in pulling to cut and wrap; damage or disappearance of non-document pulling form and checklist intermediate form (in copacking) that are categorized in undesirable area. The result of mock recall also show that the total average time consumption at PT Sweet Candy Indonesia is 310 minutes with 168,5 minutes dominated by production. Refer to those result, the effectiveness and efficiency level of traceability system at PT Sweet Candy Indonesia is still low which the maximum limit of 240 minutes as the operational standard is surpassed. In order to elevate the effectiveness and efficiency of traceability system at PT Sweet Candy Indonesia, implementation of kanban system in production can be the best solution in corrective action.
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Judul: Peningkatan Mutu Produk Chewy Coated Candy pada Tahap Pencetakan (Forming Line) di PT Sweet Candy Indonesia.
Abstrak: PT Sweet Candy Indonesia merupakan industry confectionary yang memproduksi chewy coated candy sebagai produk unggulannya. Ukuran interior kernel menjadi parameter mutu utama penentu produk yang ditolak pada tahap pencetakan. Ukuran interior kernel akan berpengaruh terhadap berat, ketebalan, serta tingkat chewiness permen tersebut. Hasil analisis kesenjangan menunjukkan bahwa masih terdapat pengendalian proses pada tahap pencetakan yang perlu diperbaiki, sehingga pengendalian proses merupakan langkah yang tepat untuk meningkatkan mutu permen tersebut. Metode peningkatan mutu permen dilakukan melalui enam tahapan, yaitu identifikasi proses produksi, identifikasi penyebab ukuran interior kernel tidak konsisten, analisis kondisi aktual, analisis kesenjangan, uji coba tindakan perbaikan, dan analisis hasil perbaikan. Implementasi perbaikan yang dilakukan, diantaranya pembuatan checklist pada tray interior, pengukuran temperature infrared pada monopump interior, dan penyusunan standar proses suhu dan speed togum interor. Masing-masing alternatif perbaikan yang dilakukan dapat menjadi panduan bagi operator dan dapat meningkatkan mutu produk yang lebih baik serta proses yang efisien.
Keyword: chewy coated candy, mutu, pengendalian proses

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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