A method is provided for delivering source containers, via a mobile robotic container delivery system, to a first shelf and a second shelf, and in a particular order. Each source container has a position on one of the first shelf or the second shelf. The method includes delivering recipient containers on a floor level below the first shelf, wherein each container of the recipient containers is configured on a respective mobile robot, providing instructions to a user to retrieve an item from a first respective source container on one of the first shelf or the second shelf, moving a respective first recipient container on its respective first mobile robot out from underneath the first shelf to receive the item retrieved from the respective first source container and receiving a confirmation that the item has been retrieved from the respective first source container and placed appropriately.