Comment by EdwardDiego

Billing, or anything else involving money, is so easy to get wrong.

The data team I ended up leading at a previous company, had an unfortunate habit of "losing" money - it wasn't real money being lost in transit elsewhere, but records of something we should charge a customer.

Or if the team wasn't losing revenue, it was double charging, etc. etc.

Took us 3 years of hard work to regain the trust of the business leaders.