Lean Six Sigma Black Belt Leading Complex, Data-Driven Projects

Complex improvement projects do not fail through a lack of data. They fail when organisations collect the wrong data, trust unreliable measurements, confuse correlation with causation or cannot convert analytical evidence into controlled operational change.

Lean Six Sigma Black Belt: Leading Complex, Data-Driven Projects is an experience-led guide for practitioners responsible for leading high-value, cross-functional improvement programmes.

Drawing on the realities of service delivery, transport and safety-critical operations, Robert Porter explains how a Black Belt combines analytical depth, project governance, change leadership and professional judgement.

The book covers strategic project selection, complex project charters, cross-functional governance, measurement-system analysis, stratified baselines, process capability, hypothesis testing, regression, designed experiments, stakeholder leadership, benefit validation, statistical process control and operational response planning.

Original graphics and a worked cross-functional case study demonstrate how these methods support real decisions rather than becoming technical exercises. A governed DMAIC delivery model and Black Belt knowledge check reinforce the practical application.

The book is deliberately honest about statistical methods. Capability indices are only meaningful when the process is stable, the measurement system is suitable and the assumptions are defensible. A small p-value does not prove causation or business value. Regression models and experiments require competent design, validation and interpretation.

It also examines the wider Black Belt role: coaching Green and Yellow Belts, navigating organisational conflict, communicating uncertainty, protecting data integrity and ensuring that financial and operational benefits receive independent validation.

Aligned with ISO 13053 and informed by ISO 18404, ASQ and established Lean guidance, the book includes Harvard-style citations and a complete reference list.

This book supports professional knowledge but does not claim that reading alone provides certification, advanced statistical competence or the practical experience required to lead complex change.

For experienced improvement practitioners ready to lead across functions, challenge assumptions and turn evidence into sustainable performance, this is the practical next step.

Written by Robert Porter.

Book Four of The Lean Six Sigma Belt Series.