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A six-station automatic assembly machine has an ideal cycle time of 12 s. Downtime occurs for two reasons. First, mechanical and electrical failures of the
A six-station automatic assembly machine has an ideal cycle time of 12 s. Downtime occurs for two reasons. First, mechanical and electrical failures of the work head occurs with frequency of once per 50 cycles. Average downtime for these causes is 3 min. Second defective components also result in downtime. The fraction defect rate of the six components added to the base part at the six stations is q = 2%. The probability that a defective component will cause a station jam is m = 0.5 for all stations. Downtime per occurrence for defective parts is 2 min. Determine the yield of assemblies that are free of defective components, the proportion of assemblies that contain at least one defective component, the average production rate, and the uptime efficiency A six-station automatic assembly machine has an ideal cycle time of 12 s. Downtime occurs for two reasons. First, mechanical and electrical failures of the work head occurs with frequency of once per 50 cycles. Average downtime for these causes is 3 min. Second defective components also result in downtime. The fraction defect rate of the six components added to the base part at the six stations is q = 2%. The probability that a defective component will cause a station jam is m = 0.5 for all stations. Downtime per occurrence for defective parts is 2 min. Determine the yield of assemblies that are free of defective components, the proportion of assemblies that contain at least one defective component, the average production rate, and the uptime efficiency
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