Patent ID: 9111251
Filing Date: 2015-08-18
Classification: B65G,G05B,G06Q

Abstract:
1. A method comprising: positioning multiple inventory holders at multiple locations at a station of an inventory system, the multiple locations including a set of multiple primary locations and a set of multiple staging locations; repositioning a first inventory holder, a second inventory holder, a third inventory holder, and a fourth inventory holder of the multiple inventory holders among the multiple primary locations and the multiple staging locations at the station using multiple mobile drive units, the repositioning comprising: following a first inventory operation when the first inventory holder is positioned in a first primary location of the multiple primary locations, following a third inventory operation when the third inventory holder is positioned in a second primary location of the multiple primary locations, following a fifth inventory operation when the second inventory holder is positioned in the first primary location, following a seventh inventory operation when the fourth inventory holder is positioned in the second primary location,