5.1.3.3 Define Task Precedence

Task Precedence indicates the execution-flow of a batch. Task Precedence Value helps to determine the order in which the specific tasks of a batch are executed.

For example, consider a Batch consisting of four tasks. The first three tasks lack define precedence and hence will be executed simultaneously during batch execution. However, Task 4 has a precedence value as Task 1, indicating that Task 4 is executed only after the successful completion of Task 1.

You can set Task Precedence between Tasks or define to run a Task after a set of other tasks. While, multiple tasks can be executed simultaneously, cyclical execution is not permitted. Tasks without defined precedence execute immediately upon Batch Execution.

Note:

The Task Precedence option is disabled if a batch has only one associated task.

To define task precedence, follow these steps:

1. From the Define Task page, select Batch/Batch Group from the drop-down list.
2. Click Add or Remove Precedence corresponding to the task requiring precedence to access the Precedence Mapping list.
   1. Select a batch to execute before the current task, from the Available Tasks pane and click Move Selected. To move all the batches, click Move All.
   2. To remove a batch from the task precedence sequence, select the task from the Selected Tasks pane and click Remove. To remove all the selected batches, click Remove All.
3. Click Save to update Task Precedence in the batches.
4. Click Preview to view the precedence information.