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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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Table 7. Data Collection instrument for the Value Stream Map for the Two Case Studies Production Process 1. Description of changeover constraints, if applicable 2. Supplier of material and frequency of deliveries Customer Requirements 1. Customer orders per month 2. Quantity contained in customer shipments 3. Frequency of shipments to customers Work Time 1. Work day per month 2. Shifts per day at each process 3. Frequency and length of standard employees breaks Production Control Data 1. Type of production control system 2. Frequency of receiving orders and method in which they are received 3. Variables influencing production control 4. Length of schedule and what processes receive the schedule. Process Information 1.Operators required 2. Numbers of machines 3. Batch size 4. Cycle Time 5. Changeover time if applicable 6.Inventory 7. Setup time 8. Quality 9. Uptime 10. Yield Processing times for each machine were measured using a stop watch. Thirty processing times were measured for each machine. Thirty is the minimum sample size to have accurate statistical results as suggested by Kelton et. al (2011) Also, Plant C provided additional data on their production rate for a period of a year (2013 period). Plant D was able only to provide data of their production rate for a month due to company’s policies. Both companies provided information of their actual inventories. 50

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