An embodiment includes a method executed by at least one processor comprising: determining inventories for first and second times for a first vending machine (VM); determining inventories for first and second times for a second VM; determining inventories for first and second times for a third VM; and determining a service route to visit the first and second VMs on a specific date, and to specifically avoid visiting the third VM on the specific date, in response to determining the inventories for the second times for the first, second, and third VMs. Other embodiments are described herein.