Switching Operation Modes Manually 
Use
You can switch an operation mode manually at any time.
However, you must always ensure that a manual operation switch does not disrupt system operation, for example, by providing too few dialog processes.

Before you switch the operation mode in the system manually you can carry out a simulation of this
Procedure
The system displays information on operation modes and server statuses.
The system displays a list of the defined operation modes.
You return to the list of operation modes and server statuses.
The servers remain in the manually activated operation mode until the next switch time.

You can also switch the operation mode on individual servers. However, you should only do this in exceptional cases, for example, if automatic switching has not worked correctly.
The system displays an error message if the operation mode switch cannot be performed on all of the chosen servers. The test log for operation mode switching (Log) helps you decide whether or not to go ahead with the switch.
See also:
Platform Specificity Switching Operation Modes Automatically