Eoin Woods

Books in this wiki: Software Architecture Metrics (contributing author, ch. 7)

Background

Software architect and technology leader; co-author of Software Systems Architecture (Addison-Wesley) and Continuous Architecture in Practice (Addison-Wesley, 2021, with Murat Erder and Pierre Pureur). Long career in enterprise and financial systems architecture.

Core Positions

Measurement must be integrated into the architecture lifecycle from the beginning, not deferred to production. Quality attributes (performance, scalability, availability, security) have distinct measurement characteristics and pitfalls — architects should understand how to measure each specifically. The four-quadrant measurement framework (artifact/operational × external/internal) provides a practical taxonomy for when different measurements become available and what insights they provide. MTTR is more important than MTBF for most systems; RPO and RTO provide more actionable availability targets than "the nines." Fitness functions don't make measurement easier — they help use measurements effectively to guide architectural work.