25th Anniversary Episode: Lean Horizons’ Reflections – The Rise of Lean Theater

As Lean Horizons celebrates its 25th anniversary, founder Mark DeLuzio reflects on a quarter century of transformation work across six continents and dozens of industries. In this special episode, Mark examines the evolution—and in some cases, the dilution—of Lean thinking since the early days of the Toyota Production System's global expansion.

How did a management system built on scientific thinking, respect for people, and leadership development become, in many organizations, a collection of tools, certifications, events, and visual displays? When did Lean transformation give way to Lean Theater?

Mark explores the "telephone game" effect that has altered Lean's original meaning over multiple generations of practitioners, consultants, academics, trainers, and certification programs. He discusses the rise of credentialism, the commercialization of Lean, the shortage of experienced transformation leaders, and the growing gap between performing Lean activities and achieving real business transformation.

Drawing on 25 years of hands-on experience, this episode challenges leaders to ask a difficult question:

Are we practicing Lean—or merely performing it?

Whether you're a Lean practitioner, executive, consultant, or student of organizational excellence, this candid reflection offers valuable lessons on what has been lost, what still works, and what the future of Lean must look like if it is to remain relevant for the next generation.

In This Episode:

The evolution of Lean over the last 25 years

How TPS principles became diluted through the "telephone game" effect

The difference between Lean transformation and Lean Theater

Why certifications don't equal capability

The commercialization of Lean and its unintended consequences