Customer success (CS) is a vital business capability that can develop out of several existing functions including support, sales, or marketing. As a company grows, CS sprawl can increase, making it difficult to consolidate resources under dedicated leadership with the technology and processes designed to achieve agreed-upon outcomes. This report shows business leaders how to use Forrester’s Total Economic Impact™ (TEI) methodology to build a business case for combining distributed, nondedicated resources into a formally chartered CS function with the processes, responsibility, and technology to support any enterprise-scale business.