Person

Ron Jeffries

Extreme Programming co-founder with Kent Beck; coach and writer on test-first development, pairing, and sustainable team practice.

Why this matters

Jeffries insists agile is technical, not ceremonial—without engineering discipline, iteration becomes theater.

Focus in observatory

Works

article

Manifesto for Agile Software Development.

Beck, Kent, Mike Beedle, Arie van Bennekum, Alistair Cockburn, Ward Cunningham, Martin Fowler, James Grenning, Jim Highsmith, Andrew Hunt, Ron Jeffries, Jon Kern, Brian Marick, Robert C. Martin, Steve Mellor, Ken Schwaber, Jeff Sutherland, and Dave Thomas. "Manifesto for Agile Software Development." 2001. https://agilemanifesto.org/.

Related concepts

Concept

Agile

Agile is used in a software engineering sense. Agile refers to iterative development approaches that shorten feedback cycles, emphasize incremental delivery, and increase team-level ownership of ongoing change.

Related books

Book

Coupling

Cohesion, Consequence, and the Architecture of Responsibility

A practical framework for seeing where systems are tightly joined, where they drift apart, and how those coupling choices shape accountability over time.