John Schleier

About the Author

John Schleier is a distinguished management consultant and thought leader in operations and process improvement, with decades of experience applying innovative methodologies to enhance organizational efficiency. As a key contributor to the Theory of Constraints (TOC) community, he has collaborated with luminaries like Eliyahu M. Goldratt to advance practical applications of constraint-based thinking in business. Schleier's expertise spans manufacturing, project management, and supply chain optimization, where he emphasizes systemic problem-solving over isolated fixes. His work has influenced countless professionals seeking sustainable performance gains, making complex concepts accessible through structured frameworks and real-world case studies. Beyond consulting, Schleier is committed to education, mentoring the next generation of leaders in lean and agile practices.