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The simulation models were used to demonstrate how vacuum drying could influence the throughput, WIP, and cycle time of one part of Plant C. The desired throughput was met using vacuum drying while WIP and cycle times were reduced. WIP and cycle time reductions from case A were respectively 48% and 87% less than conventional drying Plant C (VSM C). WIP and cycle time from case B were respectively 84% and 95% less than conventional drying Plant C (VSM C). The obtained values from case B were chosen to create the future state map, because they presented the best results of WIP and cycle time, while meeting the customers desired demand. Thus, the obtained values from Case B can more positively improve the part of the production line. 7.2.2 CASE A AND B FOR PLANT D Little’s Law was used to determine the WIP0 for case A (vacuum with air drying) and case B (vacuum with no air drying). The critical WIP gives a total number of WIP does not specify the amount that corresponds to each process. A proportion from the base model (VSM for Plant D) was determined by dividing the WIP of each process by the total WIP (the sum up of WIP at each process). The obtained value was projected for a period of 13 weeks. The two scenarios were run with 30 replications each. The obtained values are summarized in . Table 37 with a 95% of confidence. Table 37. Comparison of Throughput, WIP, and Cycle Time for Case A and B for Plant D Variables VSM C Simulation Models Plant D Case A CI* Case B CI* Throughput (MBF) 1057 3245.07 ± 3239 ± 2479 ± 44.99 3240.08 ± 3088 327 ± 311 8.33 ± 8.31 WIP (MBF) 3811 2602.98 CT (days) 233 45.11 It can be observed that for Plant D, the obtained WIP and cycle time for case A were 43% and 51% lower than conventional drying. The obtained WIP and cycle time for case B were 92% and 90% lower than conventional drying. These values show how vacuum drying can reduce WIP 115PDF Image | Impact of Vacuum-Drying on Efficiency of Hardwood Products
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