Each Herschel user enters the system by typing in their user code and a password. The system manager can define which options they can access in each module.

Also some options will only show certain information to certain users. For example, the partumber enquiry option will not show the costs of an item to users with a low access level.

All changes to data made by a user are “date-stamped” and marked with their initials, so it is easy to see who did what and when.