Which status can process instances have?
Status
A process instance can have any of the following statuses:
Running
The process instance is running the process.
Suspended
The Process Governance administrator suspended the process instance manually during process execution. This can be useful, for example, if a server outage would cause the process execution to fail.
Terminated
The Process Governance administrator terminated the process instance manually during process execution. This may be called for if, for example, the executable process is no longer relevant.
Failed
The process instance was not able to pass through the process completely due to an error. Failed process instances can be restarted after the error is fixed or re-triggered .
Idle
The process instance is in a waiting state because something unforeseen has happened while the process was passed through. The Process Governance administrator must check and resolve this.
Completed
The process instance has completely passed through the process.
Business status
The Business status is displayed in My tasks, as well as in views and filters of 
Process administration. For mini workflows and governance workflows, the business statuses are implemented by default, such as Waiting for approval or Rejected in the Submit change request workflow. For detailed information, refer to How to use the business status.