Disclosed embodiments provide systems and methods related to managing inventory by validating physical quantities of items in fulfillment centers for use with a user interface. A method for managing inventory comprises receiving, from a mobile device, a request for one or more validation locations, a zone for performing a validation, a validation type, and a round of validation, retrieving validation locations, each location associated with a status of not assigned, assigned, problem zone, or validated, and determining which of the retrieved validation locations needing assignment have a location in the received zone, a match in the validation type, and a match round of validation. Based on the determination, the method further comprises selecting one or more of the matching validation locations if a status of each determined validation locations is equal to not assigned and responding to the received request by transmitting one or more selected validation locations to the mobile device.