Safe specifications for Automation Engine setup

Discussion created by Duong_Nguyen-Nhat_2335 on Nov 18, 2016
This has been asked recently:
I am need info on server limits for users. 
Currently I have the following setup: 

- Windows 2012 R2 server 
- 12GB RAM of Memory 
- 2.70GHz (2 processors) CPU 

I need the safe specifications if there are 15-20 users logging in the server and using the application(Automic Engine) all at once. 
We do have a document about the Sizing of Automic Workload Automation Systems as in the following link:
Please follow the guidance in the above link to find out what is the safe specifications for your system.