Work Item Type: Task
This work item type is used to track the work associated with a task that is performed as part of an iteration.
Main description

During iteration planning, tasks are added to the work items list. Team members sign up for and take ownership of performing each task until they are done.

The following table shows the Task work item state machine:

Output States

Input States

New In Progress Done Invalid
  Initialize / Plan Iteration (Project Level)        
New    Start working / Complete / Invalidate /
In Progress Stop Working /   Complete / Invalidate /
Done   Reopen / Manage Iteration (Project Level)    
Invalid        

Table 1 - State machine of the Task work item