Is the ERP system priced by concurrent users or named users?

In our opinion, concurrent user pricing is usually the most cost effective option.
This means, if you have 10 people who use the system, but only 5 of them need access at the same time, you only need to pay for 5 licenses.

To Save: If some people only need access to reports, consider publishing these on a web portal with limited access instead of buying an extra user license.