This article explains the states a work step can have and where to find the status:
waiting: The work step is not planned, yet (original state).
pending: The work step is planned, but the execution has not yet start.
running: The work step is being processed at the moment.
paused: The execution of the work step is paused.
completed: The execution of the work step is completed.
canceled: The execution of the work step is canceled.
The status is either displayed in your work steps list or when clicking on a particular work step in your production plan.
Note
When a work step is running, the business data can be tracked by using the iPad app.