Question
A semi automated assembly machine assembles & welds automotive components for a single shift of 8 hours, 5days a week planned throughput =275 units /hour
A semi automated assembly machine assembles & welds automotive components for a single shift of 8 hours, 5days a week planned throughput =275 units /hour actual output = 2200 units week. Calculate Overall Equipment Efficiency. The following losses are encountered during assembly Incorrect assembly causes the machine to stop and needs re-set on average 6 times/hr where 4 unit and 8 minutes are lost Worn out electrodes are to be replaced once per week, it takes 75 minutes when 45 units are scrapped Burst out cooling hose causes a machine breakdown once in a month and replacement takes 6.25hours Misaligned fixture causes a loss of 220 units/ weck For different size parts, fixtures to be removed and replaced and electrode position to be adjusted 3 times/weck which takes 3hours where 40 units are scrapped each time Actuating cylinder sometimes sticks for 35 minutes/adjustment causing production delay which takes double cycle time Application of rust protective spray by operator stopping the machine at the start and end of the day takes 8 minutes each time Limit Switches Corrode once in every 7 weeks stopping the machine& replacement takes 330 minutes
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