Managing inventory items via overhead drive units
First Claim
1. An inventory management system to manage a plurality of inventory items, comprising:
- a plurality of inventory holders, each of the plurality of inventory holders configured to receive a subset of the plurality of inventory items;
a plurality of mobile drive units to move the inventory holders, the plurality of mobile drive units comprising a ground drive unit and an overhead drive unit;
a management module, comprising;
a memory that stores computer-executable instructions; and
a processor configured to access the memory and execute the computer-executable instructions to at least;
receive a storage request to store an inventory item of the plurality of inventory items;
access information about a frequency of access associated with the inventory item, the frequency of access representing a projected frequency that the inventory item will be accessed;
access a storage density indicator associated with each inventory holder of the plurality of inventory holders, the storage density indicator for each inventory holder representing a density of the inventory holders in a vicinity of the respective inventory holder;
select an inventory holder for the inventory item based in part on the storage density indicators of the plurality of inventory holders and the information about the frequency of access associated with the inventory item; and
instruct a mobile drive unit to store the inventory item in the selected inventory holder at the storage location.
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Accused Products
Abstract
The disclosed inventory system and methods can be used to improve storage time for storing less frequency accessed inventory items. Specifically, a mobile drive unit may be selected from a plurality of mobile drive units to store an inventory item by obtaining storage densities of available storage locations and selecting a storage location for an inventory item based on the projected frequency of access of the inventory item. An overhead drive unit may be selected over a ground drive unit to store less-frequently accessed inventory items in densely-packed storage areas. Inventory holders may be selected based on projected frequency of access of other inventory items stored therein.
42 Citations
20 Claims
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1. An inventory management system to manage a plurality of inventory items, comprising:
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a plurality of inventory holders, each of the plurality of inventory holders configured to receive a subset of the plurality of inventory items; a plurality of mobile drive units to move the inventory holders, the plurality of mobile drive units comprising a ground drive unit and an overhead drive unit; a management module, comprising; a memory that stores computer-executable instructions; and a processor configured to access the memory and execute the computer-executable instructions to at least; receive a storage request to store an inventory item of the plurality of inventory items; access information about a frequency of access associated with the inventory item, the frequency of access representing a projected frequency that the inventory item will be accessed; access a storage density indicator associated with each inventory holder of the plurality of inventory holders, the storage density indicator for each inventory holder representing a density of the inventory holders in a vicinity of the respective inventory holder; select an inventory holder for the inventory item based in part on the storage density indicators of the plurality of inventory holders and the information about the frequency of access associated with the inventory item; and instruct a mobile drive unit to store the inventory item in the selected inventory holder at the storage location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for storing an inventory item, comprising:
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identifying a popularity of an inventory item; determining a storage location for the inventory item, the storage location being characterized by a difficulty of access to the storage location by the ground drive unit; accessing information about an inventory holder having a first portion comprising a top of the inventory holder and a second portion comprising a bottom of the inventory holder; when the determined storage location exceeds a threshold for difficulty of access, selecting the first portion of the inventory holder for storage of the inventory item based at least in part on the popularity of the inventory item; and storing, at the determined storage location, by a mobile drive unit, the inventory holder containing the inventory item in the first portion. - View Dependent Claims (11, 12)
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13. A computer-implemented method for storing an inventory item, comprising:
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receiving instructions to store a first inventory item; selecting an inventory holder for receiving the first inventory item based on a first frequency of access associated with the first inventory item and a second frequency of access associated a second inventory item stored at the storage location, wherein the first frequency of access is related to the projected frequency with which the first inventory item will be retrieved and the second frequency of access is related to the projected frequency with which the second inventory item will be retrieved; selecting a storage location for storing the inventory holder containing the first inventory item based at least in part on the frequency of access associated with the first inventory item and on an estimated difficulty of accessing the storage location; selecting a mobile drive unit from a plurality of mobile drive units to store at least one portion of the inventory holder at the storage location, the plurality of mobile drive units comprising ground drive units and overhead drive units, wherein selecting the mobile drive unit comprises selecting an overhead drive unit to lift the at least one portion of the inventory holder from above and place the at least one portion of the inventory holder at the storage location, or selecting a ground based drive unit to lift the at least one portion of the inventory holder from below and move the at least one portion of the inventory holder of the storage location, the selecting based at least in part on an estimated difficulty of accessing the storage location by the ground drive unit; and instructing the selected mobile drive unit to store the at least one portion of the inventory holder, including the first inventory item, at the storage location. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification