A method and system for updating and verifying the accuracy of a retailer's planogram, while using a portable shopper device having a location sensing means and an RFID reader in conjunction with RFID shelf labels, is provided for. In part, the method provides a system and steps associated with collecting RFID product label information and comparing collected information with product information in relation to an initial planogram, via a software means. Once differences are identified, an updated planogram may be created for the retailer's use using the system and method of the present invention.