Multi-Compartment Tote Decanting to Prevent ASRS Starvation
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Solution Overview
Problem
Existing decant operations in warehousing and order fulfillment systems often lead to starvation and bottlenecking due to the requirement for totes to be fully depleted before receiving additional inventory items, inefficient labor usage, and under-utilized storage volume in partially filled totes.
Innovation Solution
An automated warehouse system with multiple decant positions dedicated to receiving totes of specific compartment configurations, guided by a warehouse control system (WCS) to ensure continuous availability of empty compartments, and a transportation system to manage tote movement between ASRS and decant workstations, optimizing decanting without the need for reconfiguring dividers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If totes are required to be fully depleted before receiving additional inventory items, then inventory management is simplified, but storage volume utilization is under-utilized and downstream processes experience starvation
Solution Approach 1:
The system pre-positions totes with various compartment configurations at decant positions before they are needed. The WCS monitors compartment fill levels and proactively manages tote availability, allowing downstream processes to continuously receive inventory without waiting for upstream decant operations to complete full tote cycles.
Solution Approach 2:
The tote is divided into multiple compartments that can be independently managed. Each compartment can be filled, depleted, and refilled independently of others, allowing partial depletion and refill operations without requiring the entire tote to be emptied first. This segmentation enables continuous inventory flow while maintaining organized storage.
2Device complexity
If a single access portal feeds decant workstations, then system complexity is reduced, but tote availability becomes unpredictable causing bottlenecks
Solution Approach 1:
Multiple totes with different compartment configurations are pre-positioned at various decant positions simultaneously. When one tote is being used or is unavailable, other pre-positioned totes are immediately available for deployment, eliminating waiting time without requiring complex retrieval operations.
Solution Approach 2:
The system transitions from a single-queue tote supply model to a multi-position parallel supply model. Multiple totes are distributed across different decant positions in space, allowing simultaneous access and eliminating the sequential bottleneck of a single access portal.
3Adaptability or versatility
If decant operators must adjust dividers to accommodate products, then product placement flexibility is improved, but labor efficiency decreases
Solution Approach 1:
The tote is segmented into multiple fixed compartments of different sizes and configurations. Each compartment is pre-designed to accommodate specific product types or size ranges, eliminating the need for operators to adjust dividers while maintaining product placement flexibility through the variety of pre-configured compartments.
Solution Approach 2:
Different compartments within the same tote have different characteristics (sizes, shapes, configurations) optimized for specific product types. This local differentiation provides product accommodation flexibility without requiring global adjustment of the entire tote structure by the operator.
4Volume of stationary object
If multiple tote types with different compartment configurations are used, then storage optimization is improved, but system complexity increases
Solution Approach 1:
A single multi-functional decant workstation is designed to handle multiple tote types with different compartment configurations. The workstation can accept and process various tote formats, and the WCS intelligently routes appropriate totes to appropriate decant positions, providing storage optimization without requiring separate specialized equipment for each tote type.
Data Source
AI summary
A system and method are provided for decanting inbound goods into optimally dimensioned compartments of totes for storage in an ASRS storage system. The system includes decant workstations with multiple tote decant positions each dedicated to receive totes having a compartment configuration different than for those at the other decant positions. The method includes presenting a decant operator with multiple totes such that the operator substantially always has an empty or partially filled compartment of each available compartment size which to place inbound items into. A warehouse control system guides the operator to which presented tote and which compartment within that tote to place the items. The warehouse control system monitors each of the totes at the decant positions and once a tote's compartments are all filled to capacity, that tote is returned to the storage system and replaced with another tote having an identical compartment configuration.