Enterprise architecture programmes frequently struggle with scope confusion, misaligned stakeholder expectations, and poor traceability between business requirements and delivery plans. This paper presents a building block approach — distinguishing Business Building Blocks (capabilities) from Solution Building Blocks (systems and technologies) — developed and validated on a multi-project transformation programme at a rapidly expanding South African telecoms company. The result was dramatically improved communication between sponsors, stakeholders, programme managers, and development teams, and a shared, navigable picture of what would be delivered, when, and in what sequence.