In Epan you can analyze activity log of your company.
Activity is event which create general notification. This notification and activity is visible to concern person based on ACL.
For ex : If you set access controls to view or edit "Approved" invoices by particular department's employees. So when an invoice will be approved by authorized employee then an notification will be pushed to all employees whose authorized to view "Approved" invoices.
Activities log can be viewed by an employee, click on My Menu >> Activity.
Here activities log list can be filtered too, based on date range , created by person name, related person name, department name or communication type.