The following table describes the states that appear on the State Transition Diagram. States ending in "ing" and marked by an asterisk are the active states.
| State | Description |
|---|---|
| Idle | The phase is ready for a Start command. |
| Running* | Normal sequence is in progress. |
| Complete | Normal sequence has completed. |
| Stopping* | Permanent (but not emergency) shutdown is in progress. |
| Stopped | Permanent (but not emergency) shutdown has completed. |
| Aborting* | Emergency shutdown is in progress. |
| Aborted | Emergency shutdown has completed. |
| Holding* | Temporary hold or failure handling sequence is in progress. |
| Held | Temporary hold or failure handling sequence has completed; the phase is ready for a Restart command. |
| Restarting* | Sequence for recovery from hold or failure handling is in progress. |