The link below gives you a good start.
again for the work flow in GRC tool is different..
Hope this helps
This tab is used when you need to include a process. for example if the employee want to book a company vehicle and need the approval of the manager.
here again there are multiple ways --either its a single step process or a multistep process.
why its not "normaly" used i s because such proceeses may be already included in th ecorporation thru another process for example notes or paper work or emails
hoep this helps !