The user requires the ability to retrieve detailed information on a specific item in inventory by entering the item number and pressing the Retrieve button. When the detailed information is…

The user requires the ability to retrieve detailed information on a specific item in inventory by entering the item number and pressing the Retrieve button. When the detailed information is displayed, the user is also given the ability to change the detailed information or delete the entire item from the inventory and pressing either the Change or Delete button. How would this (these) transactional function(s) be measured?