Q. In a job shop Machine Center A has a ten minute set-up time per batch and a 2 minute per unit run time. Machine Center B performs identical function but has a set-up time of thirty minutes and a 1 minute run time per unit. Job shop makes products in batches ranging from 1 unit to 1 hundred units. Assuming capacity is not a limitation on either machine, on which batches should Machine Center B be used?