Frameworks such as Multidimensional Quality Metrics (MQM) provide detailed feedback on translation quality and can pinpoint concrete linguistic errors. The quality of a translation is, however, also closely tied to its utility in a particular use case. Many customers have highly subjective expectations of translation quality. Features such as register, discourse style and brand consistency can be difficult to accommodate given a broadly applied translation solution. In this presentation we will introduce the concept of Business Critical Errors (BCE). Adapted from MQM, the BCE framework provides a perspective on translation quality that allows us to be reactive and adaptive to expectation whilst also maintaining consistency in our translation evaluation. We will demonstrate tooling used at Unbabel that allows us to evaluate the performance of our MT models on BCE using specialized test suites as well as the ability of our AI evaluation models to successfully capture BCE information.