I am looking for some document or any article that will have some introductory level of CA Process automation.
Below are some links which might help you to acclimate with CA Process Automation features and use cases.
CA Process Automation - CA Technologies
CA Process Automation Product Overview & Demo
Improve time to resolution using PAM
CA Process Automation Youtube Communities
Along the same lines, I think that CA's GIS BrightTalk web cast about automation of on- and off-boarding of employees using CA Process Automation can be quite inspirational input as well: https://www.ca.com/us/why-ca/connect-with-us/events/webcasts/ppm-and-agile.html?commid=236035&utm_campaign=communication_viewer_followup&utm_medium=email&utm_source=brighttalk-transact&utm_content=webcast
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