Inventory
When stock does not match, does the system explain the movement or does a chat investigation begin?
Selling, invoicing and showing stock do not tell the whole story. Look at how much work your people do to complete what the system does not understand.
The test
When stock does not match, does the system explain the movement or does a chat investigation begin?
Do managers see progress during the month or only get the answer when there is nothing left to change?
Does the system know discounts, credit and exceptions, or does the most experienced employee know them?
Can you explain what a customer owes and why without rebuilding payments, notes and advances?
Are you managing one company or several versions of how things are done?
Can a new business question be answered in the ERP, or does it become a special request to IT?
The uncomfortable question
In spreadsheets. Chats. Calls. Someone's memory. Reports only one person knows how to prepare.

What we are after
Metrify was born because we also had an ERP that did the basics. The product changed when we started putting the operational knowledge that lived outside the system back inside it.
Bring the spreadsheet, exception or process that still depends on calls, memory or repeated data entry. Start there.