Statistical sampling security methodology for self-scanning checkout system
US6092725A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1997 |
| Grant date | Jul 25, 2000 |
| Priority date | — |
| Expiry date | Sep 18, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07G3/003
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A statistical basis for use in a self-scanning checkout system determines how many items to check in a shopper's shopping cart for incorrect or missing scans as well as which particular or types of items to check to determine if they were properly scanned, if the shopper is determined to be audited. The present invention does not audit every customer, but rather determines whether a given shopper or customer is to be audited on a given shopping trip based upon obtaining a minimum checkout loss for such customer. The methodology determines how many items to check for a given shopper as well as which particular items to check for that shopper. The following factors attempt to model the real world of shopping and may be considered, alone or in varying combinations, in determining the number of items to check for a particular shopping transaction: shopper frequency; queue length; prior audit history; store location; time of day, day of week, date of year; number of times items are returned to shelf during shopping; dwell time between scans; customer loyalty; store shopping activity and other factors. Using statistical decision theory for auditing policies a minimum loss per shopper tra…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.