S&R Activity for TU

Whenever you create a TU, the system automatically creates an S&R activity. The S&R activity holds data, such as direction (inbound or outbound) or the planned and actual arrival and departure times. All actions for a TU (for example, assigning deliveries) are executed in the S&R activity. After the creation of the S&R activity, the state of the object becomes Planned. When the TU arrives at the checkpoint, the state then becomes Active. After the departure from checkpoint, the state finally becomes Completed. This means that the S&R activity and its states for a TU comprises the period of the TU in the yard.

You can have only one active S&R activity for each TU. In this case, the TU is physically in the yard. However, you can have several planned or completed S&R activities for a TU.

S&R Activity for Vehicle

The S&R activity of a vehicle is analogous to the S&R activity of a TU, except that it contains no delivery assignments, only TU assignments.

S&R Activity for Door

The system creates the S&R activity for a door when you assign a door to a TU. The state of the S&R activity is Planned in this case. When the TU arrives at the door, the state of the S&R activity becomes Active. After departure from the door, the state becomes Completed. This means that the S&R activity and its states comprises the period of a TU at the door for loading or unloading.

You can have only one active S&R activity for each door. The door is occupied in this case. However, you can have several planned and completed S&R activities for each door.