This document presents a research-based maturity model for measuring organizations' progress in IT transformation. The model segments organizations into four levels of maturity based on surveys of 1,000 IT executives about their infrastructure, processes, and relationships. Only a small percentage have achieved the highest levels of modernized infrastructure, automated processes, and business-IT alignment needed for digital transformation. Higher maturity is correlated with improved agility, efficiency, innovation funding, and business outcomes. Adopting modern data center technologies, automated processes, and DevOps practices can help organizations progress to more mature states.