Judul: Program Minimalisasi Cacat (Grade B) Produk Marinasi A dan Peningkatan Quality Awareness di PT Belfoods Indonesia
Abstrak: Controlling program of production process for product marinated A that applied in PT Belfoods Indonesia still should be improved. This can be seen from the value of defect that has been result. The objectives of this research are to reduce the percentage of defect in product marinated A with using SPC tools, such as Pareto diagram, Ishikawa diagram and check list and also to analyze employee awareness of quality by using a questionnare. Based on Pareto diagram, dominant type of defect is pink bone and coating off more than 2 cm2. It was driven by a gap among implementation and work instruction. After the improvement has been implemented by controlling the parameter process, pink bone defect has been reduced until 70.83%. While based on the result of a quetionnare, the average level of awareness employee against of the outcome of production in the departement of QA is 85.8, departement of premix is 76.00, departement of RnD is 72.50, departement of QC is 71.71, departement of production is 68.43, departemen of engineering is 59.40, finish goods is 49.32, and raw material warehouse is 44.25. Overall, the average level of awareness employess of PT Belfoods against the quality of producing stuff 60.91.
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Judul: Penerapan Sistem Hazard Analysis Critical Control Point (HACCP) dan Statistical Process Control (SPC) dalam Proses Produksi Bumbu Penyedap Rasa di PT Unilever Indonesia Tbk
Abstrak: PT Unilever Indonesia Tbk built new factory, Lion, where new savoury products are produced. As one of big company who give priority to maintaining consistency and quality of products, food quality management sistem and quality control of process is very important to do. The purpose of this research is to apply HACCP system and SPC in monitoring the Aw quality of the product. The HACCP implementation methods used consisted of pre-requisite program HACCP study, and HACCP Plan preparation based on five steps and seven principles of HACCP and The SPC methods used consisted of observation and identification of problems, brainstorming, control chart, fishbone diagram, Pareto diagram and action plan. Based on the identification and determination of CCPs of HACCP, there are four groups material that are categorized as OPRP and one OPRP in the process. There is one CCP on filling process, which the product passed through a metal detector machine to prevent contamination of foreign matter in the form of metal. The conclusion of identification problem brainstorming is Aw out of standard spesification. measurement results of samples 252 batch using i-chart indicating that the process is out of control. Using fishbone diagram, why why analysis and pareto analysis,the causes of Aw problem were analyzed. it was observed that there were four main problems contributed to 82,5% causes of this case includes RH of packing hall outside the standard (25%), semi-finished goods packaging products during the process of filling opened (25%), RH of dehumidifier outside standard (25%), and unloading time (7.5%).The action plan such as material handling monitoring along the process has been implemented to solve the problems.
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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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