Robots are small software applications that would run your RPA workflow in a system.
Robots that needs to be triggered manually to start/stop , thus cannot be controlled without manual intervention.
Robots that can be remotely controlled or programmed to trigger automatically. Unattended Robot typically require a separate application license for their management console. A single management console can manage hundreds of Robot.
*Effort exclusive to workflow development only. Typically most RPA projects also includes effort for business analysis and testing. Typically the testing takes up to 30% of the development time where as the effort for business analysis might vary on requirement basis