What proportion of machine time would be lost in operating four machines when the machine operates 70

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What proportion of machine time would be lost in operating four machines when the machine operates 70 percent of the time unattended and the operator attention time at irregular intervals averages 30 percent? Is this the best arrangement on the basis of minimizing the proportion of machine time lost?

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Niebels Methods, Standards and Work Design

ISBN: 978-0073376318

13th edition

Authors: Andris Freivalds, Benjamin Niebel

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