Dynamic Negative Perpetual Inventory Resolution

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Solution Overview

Problem

Perpetual inventory systems often face inaccuracies leading to overstated or understated inventory values, resulting in premature ordering and increased costs due to negative PI values, which can occur from various errors such as damage, loss, or incorrect data entry.

Innovation Solution

A dynamic negative perpetual inventory adjustment system that utilizes sensors, data analysis, and reset rules to identify items with negative PI values and adjust them based on real-time activity data, resetting values to zero or updating them to reflect actual received quantities, thereby maintaining accurate inventory records without human intervention.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If negative PI values are not corrected, then inventory records remain inaccurate, but correcting them requires manual intervention which increases time and labor costs

Engineering Contradiction:
Improveinventory accuracyVSAvoidmanual correction time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The system enables automatic detection and correction of negative PI values through programmed components that continuously monitor inventory data, identify negative values, and reset them without human intervention, allowing the inventory system to self-correct errors

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The system implements continuous monitoring of PI values with automatic feedback loops that detect negative values and trigger correction procedures, creating a closed-loop control system that maintains inventory accuracy

Inventive Principle:
Principle #23Feedback

2Measurement precision

If negative PI values are corrected manually, then inventory accuracy improves, but operational efficiency decreases due to increased restocking tasks

Engineering Contradiction:
Improveinventory accuracyVSAvoidoperational efficiency
Core Design Contradiction:
Measurement precisionVSProductivity

Solution Approach 1:

The system performs preliminary detection and correction of negative PI values before they impact ordering decisions, preventing premature restocking orders and maintaining operational efficiency by addressing issues proactively rather than reactively

Inventive Principle:
Principle #10Preliminary action

3Measurement precision

If continuous monitoring of all items is implemented, then inventory accuracy improves, but system complexity increases

Engineering Contradiction:
Improveinventory accuracyVSAvoidsystem complexity
Core Design Contradiction:
Measurement precisionVSDevice complexity

Solution Approach 1:

The system extracts only the critical function of detecting negative PI values from the broader inventory management system, focusing monitoring resources on identifying and correcting negative values rather than continuously analyzing all inventory parameters

Inventive Principle:
Principle #2Taking out (Extraction)

Data Source

PatentUS11341453B2Dynamic negative perpetual inventory resolution system
Publication Date: 2022.05.24 WALMART APOLLO LLC
  • US11341453B2 patent drawing
  • US11341453B2 patent drawing
  • US11341453B2 patent drawing

AI summary

Examples provide a system for dynamically resolving negative PI. A negative reset component resets a negative PI value in an inventory record for a selected item to zero if there is an absence of activity associated with instances of the item. There is an absence of activity if there are no shipments, transactions, or items scans associated with instances of the item during a threshold time-period. An analysis component analyzes real-time data associated with the selected item, including invoice data, transaction data, and sensor data to determine whether there is activity associated with an item during the threshold time-period. A receiving component resets a negative PI value associated with an identified item to a positive PI value representing the number of instances of the item received during the threshold time-period.