When an action is in the In Progress state, the responsible person or action initiator can create tasks. When a task is created it proceeds through the workflow.
A task has the following workflow stages: Preparing, Not Complete and Complete.
The default state when a task is created. When the responsible person has finished preparing the task, the state can proceed to Not Complete.
This is the state in which the work should be performed. In the Not Complete state, the assignee can mark the task as completed. This proceeds the workflow to the Complete state,
The Complete state is the final state of task workflow. In this state the assignee would have completed the task.