Status Sequence 
Use
You can define restrictions and fixed sequences for the status change. For this reason, status sequences are defined in Customizing. Using the status sequence, you can also indicate which statuses are not allowed, and which are mandatory.
For each status, you define whether it is one of the following:
a mandatory status
a recommended status
an optional status
a prohibited status
The next status can be specified with the kanban signal:
If you use the bar code to change the status, the next status can be included in the bar code information.
The next status can also be selected in the input screen for the manual kanban signal or the kanban signal via bar code. If no next status has been selected and if this information is not included in the bar code, the system determines the next status automatically using the data recorded in the status sequence. If the next status field has been selected, and no status sequence has been defined, the system uses the standard status sequence with the two mandatory statuses FULL and EMPTY.
In the kanban board, the next status is always set by selecting the corresponding function.
Depending on whether the next status is specified or not, the status sequence has the following effect:
If the appropriate next status is included in the kanban signal, the system checks whether a status defined in Customizing as prohibited is to be set or whether a mandatory status has been missed out in the status sequence.
If the corresponding next status is not given with the kanban signal, the system determines the next status automatically using the status sequence. The next recommended or mandatory status is set in the status sequence as follows: WAIT, EMPTY, IN PROCESS, IN TRANSIT, IN USE.
Note
The status WAIT can only be prohibited for the status change by the user. However, the system will continue to set this status, even if it is set to "prohibited" in the status sequence (for example, if a new kanban is introduced to the control cycle).