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: Aplikasi Siklus PDCA (Plan, Do, Check, Action) Dalam Upaya Menurunkan WIP (Work In Process) Produk Chicken Nugget di PT. Belfoods Indonesia
Abstrak: Chicken nugget is the main product that produced by PT. Belfoods Indonesia. The purpose of this research internship is reducing the amount of WIP (Work In Process) of chicken nuggets A which has size 250 grams during the production process. Chicken nugget production process has several stages. Packaging stage is the stage that determines the amount of WIP product. Working methods to implement PDCA cycle (Plan, Do, Check, Action). The analysis showed that there were four factors that influence the amount of WIP products, the amount of spade and design didn’t fit, unstructured product after filling, the difference determination officers to tidy packaging, and packaging decoding after exit IQF products. Work plan was prepared by providing employee training and submission of the purchase and design of a new tool. The results of the second times from repairing process after conducting employee training even without the use of alternative tools (shovel) was quite successfully. Control measures had been done by drafting some work rules and division of labor during packaging
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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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