Impact of Vacuum-Drying on Efficiency of Hardwood Products

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Impact of Vacuum-Drying on Efficiency of Hardwood Products ( impact-vacuum-drying-efficiency-hardwood-products )

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Creation of the base model by the use of SIMIO TM software Use of Easyfit Software for the input model of the distributions Simulation Model Simulations runs for a period of 13 weeks and with 30 replications each Creation of the vacuum with air drying and no air drying models based on the base model (VSM) Validation of the base model by queuing theory Analysis of the results Figure 10. Steps used to develop the simulation models 7.1 PLANT C AND D PRODUCTION PERFORMANCE GIVEN BY LITTLE’S LAW ANALYSIS Little’s Law is used by industrial engineers to predict system behavior and validate operational improvements in a variety of factory settings. Little’s Law establishes three comparison cases: the practical case, the best performance case, and the worst performance case, which were discussed in section 2.11 of the literature review. Little’s Law was used to analyze the production performance (how efficiently a production line is) of the two case studies. First the average process rate, which is the number of units that can be produced in certain period of time (in our case MBF/min) was calculated at each workstation. Then the bottleneck rate (rb) and raw process time (T0) were calculated. The bottleneck rate (rb) is the rate (parts per unit) of the workstation having the longest utilization. Raw process time (T0) is the sum of the long term average process time of each workstation. The results are presented in 107

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