TSI
A TSI (Task Specific Interface) contains selection levels and selection steps with several (predefined) business objects. A TSI offers various user groups with the required functionality to perform specific tasks and activities.
A selection level displays a BO's elements list. A selection level includes multiple layouts that determine how a BO or UDBO is presented to the end user. Each layout determines how fields, tabs, actions and status transitions are displayed. For the end users, TSIs are available in the Navigation panel.