Judul: Aplikasi Statistical Process Control (SPC) Dalam Pengendalian Bobot Bersih Beef Sausage Kemfood di PT Kemang Food Industries
Abstrak: Sausage is one of the most popular processed meat products. It is produceed from mixing of fine meat and flour or starch, with or without adding of additional substances. PT Kemang Food Industries is one of the most wellknown producer of processed meat products in Indonesia. Among the products which are produced by PT Kemang Food Industries are meatball, sausage and beef slice ham. The present study is focused on the Beef Sausage Kemfood. One of the most important parameter that needs to be controlled in processed meat is its net weight. In order to evaluate the production performance on this parameter, the data of net weight of beef sausages have been collected daily for two months. Their values were then analyzed using X-bar and R control charts. The result showed that production performance is in the condition of out of control state. Further analysis using Ishikawa diagram showed that the root cause can be grouped into four categories, i.e. management, method, human and machine. To make corrective action, a survey has been conducted to determine the ultimate cause of variation of net weight of Beef Sausage Kemfood. The survey showed that the corrective action have to be focused on the filler machine. Several suggestions to improve this matter have been proposed, such as : periodical calibration and maintenance, and consideration to purchase new filling machine
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Judul: Penerapan Statistical Process Control (SPC) dalam Analisis Pengendalian Proses Produksi Chicken Nugget di PT.Belfoods Indonesia, Bogor Jawa Barat
Abstrak: Statistical Process Control (SPC) is one of method that’s widely used in industry to control the production process. Process control is always associate with quality of finish products. PT. Belfoods Indonesia as one of meat processing company with chicken nugget as main product has used the quality system in each production process. The practice of this internship program used application of SPC, including the use of check sheets, Pareto diagram, Ishikawa diagram, graphs and control charts and scatter diagram for regression and correlation analysis. Chicken nugget ‘B’ is the product with highest defect between other nugget. Based on the interpretation of Pareto diagram, there are many curved shape product. Ishikawa diagram showed that the main cause factor is meatmix temperature setting and texture changes rapidly during storage. From result of the control chart, we knew that the temperature of dough after the mixing process, before forming and when forming process are out of control. This condition indicated that process production had loss controlled. Some of data collected also showed the temperature conditions are out of the company's specifications. Based on analysis of regression and correlation, the increased of dough temperature during forming process was very influential to product defect. The result of data collections and observation about meatmix texture and dough temperature during storage used to determine the place and time limits of storage should be done. Meatmix can’t be put on cold storage more than one hour. The final results of this study can be used to evaluate of production process control and prevent product defect.
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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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