BROKEN CASE PICKING SYSTEMS

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World-Class Warehousing and Material Handling

Figure 7.35 Tote picking system

more orders on each pass through the picking zones. Tote picking rates range from 150 to 300 lines per person-hour. The improvement over cart picking must be sufficient to justify the additional investment in conveying and sorting systems. Person-up Systems In the systems described thus far, the operator remains at floor level. To improve the utilization of building cube and floor space, order pickers can ride up on an order-picker truck or a person-aboard ASRS machine to locations as high as 40 to 50 feet (Figures 7.36 through 7.39). The operation of order-picker trucks was explained in Chapter 6. The operation of a person-aboard ASRSs is described next. A person-aboard ASRS (Figure 7.40), as the name implies, is an automated storage and retrieval system in which the picker rides aboard a storage/retrieval machine to the pick locations. The storage locations may be provided by stacked-bin shelving units, stacked storage cabinets, and/or pallet racks. The storage/retrieval machine may be aisle captive or free roaming. Typically, the order picker leaves from the front of the system at floor level and visits enough storage locations to fill one or multiple orders

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