The robot teaching device customizes the interface, and the teaching device adds control logic to the user. Once the operator has created and tested his program, he needs to run dozens of parts. Using the teaching device, he can add control logic so that the application can run unattended, and can usually be used with other robots or devices in the work unit. On the contrary, most OLRP software neither has a built-in control logic structure nor allows it to be added.