This document introduces the concept of a cloud-based clinical trial management system (CTMS) and discusses its potential advantages over traditional legacy CTMS systems. It defines cloud computing and explains how a cloud-based CTMS would work and be architected. Key benefits highlighted include scalability, elasticity, lower costs through a utility pricing model, and faster innovation cycles through a multi-tenant architecture. The document argues that a cloud-based CTMS could transform how clinical trials are conducted by enabling sponsors to instantly expand global trials. It concludes by noting that developing a successful cloud-based CTMS requires an accurate data model as the foundation.