When mobile data, video and streaming plans started offering an “all-you-can-eat” menu, they included just that – unlimited usage. Regardless of the amount of data used, the concept was that the subscriber was charged a single fixed rate each month, in order to avoid overage charges and customers’ experiencing bill shock. Many in the industry believed these flat rate tariffs would alleviate the need for billing and rating validations or requiring assurance services. Instead, what transpired was a realization that the complexities of revenue assurance audits simply shifted the goal posts for revenue assurance teams to continue to deliver billing accuracy.