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Little’s Law was used to calculate the throughput value for the worst practical case using the equation 5. The worst practical case is one of the three scenarios that Little’s Law uses to determine if a production line is working efficiently or not. It was calculated that throughput should be 7.95 MBF/day and 11.93 MBF/day for Plant C and D respectively. However, the measured values indicate that the system produces 16.275 MBF/day and 50 MBF/day for Plant C and D. The measured values are higher than the values suggested by Little’s Law. According to Little’s Law if the measured values are lower than those suggested by the practical worst case, it means that the production if not working efficiently; but if the measured values are higher than the ones suggested by Little’s Law the production line is working efficiently. Both companies (C and D) produce more throughput than the values given by Little’s Law, therefore the results show that both companies have a good performance. 7.2 SIMULATION RESULTS Simulation was used to model one production line for Plant C and D obtained in section 6. The purpose of the simulation was to simulate the actual system, and with this, to derive two new models using the same processes but changing the conventional drying operation to vacuum drying and air drying and vacuum drying. The model was run for a period of 13 weeks for both companies to represent an approximation of the amount of inventory they had in their production according to the time line of their respective VSM. Validation of the simulation model consisted of comparing the cycle times and throughput of the simulation with the values from the production line. SimioTM software establishes as a minimum of 30 replications to obtain statistics of the results. The obtained results are shown in 110PDF Image | Impact of Vacuum-Drying on Efficiency of Hardwood Products
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