Architecture Practice Methods

Jul 15, 2025 · Fundamentals

IBM BSP: The 1960s Enterprise Architecture Matrix That Still Guides Modern Practice

This article dissects IBM's Business Systems Planning (BSP) methodology, detailing its 4A×3 layer matrix that crosses four architecture domains (Business, Application, Data, Technology) with three abstraction layers (Conceptual, Functional, Operational), and highlights its engineering practicality and bidirectional traceability over later frameworks like Zachman and TOGAF.