The document provides guidance on planning and running a digital transformation through an iterative architecture approach. It recommends starting with a minimum viable product and iterating quickly through a plan-build-test-run cycle. Both technical and non-technical ("peopleware") aspects should evolve iteratively. Software systems should follow modular architectures that separate systems of engagement, integration, automation and records. Tools like Scrum, SAFe and TOGAF can help structure the process. Enablers include APIs, open standards, containers and edge technologies. The overall approach is to think big through small iterative steps with rapid feedback.